added max77696 backlight driver using the max77696 MFD driver, tested on kindle pw3

copied over from freescale kernels

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>

Documentation/devicetree/bindings/display/imx/fsl,mxc-epdc.yaml

@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,mxc-epdc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX6 EPDC
+
+maintainers:
+  - Andreas Kemnade <andreas@kemnade.info>
+
+description: |
+  The EPDC is a controller for handling electronic paper displays found in
+  i.MX6 SoCs.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx6sl-epdc
+      - fsl,imx6sll-epdc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bus clock
+      - description: Pixel clock
+
+  clock-names:
+    items:
+      - const: axi
+      - const: pix
+
+  interrupts:
+    maxItems: 1
+
+  vscan-holdoff:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  sdoed-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  sdoed-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  sdoez-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  sdoez-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  gdclk-hp-offs:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  gdsp-offs:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  gdoe-offs:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  gdclk-offs:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  num-ce:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maxItems: 1
+
+  timing:
+    $ref: /display/panel/panel-timing.yaml#
+
+  DISPLAY-supply:
+    description:
+      A couple of +/- voltages automatically powered on in a defintive order
+
+  VCOM-supply:
+    description: compensation voltage
+
+  V3P3-supply:
+    description: V3P3 supply
+
+  epd-thermal-zone:
+    description: 
+      Zone to get temperature of the EPD from, practically ambient temperature.
+
+
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+  - vscan-holdoff
+  - sdoed-width
+  - sdoed-delay
+  - sdoez-width
+  - sdoez-delay
+  - gdclk-hp-offs
+  - gdsp-offs
+  - gdoe-offs
+  - gdclk-offs
+  - num-ce
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx6sl-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    epdc: epdc@20f4000 {
+        compatible = "fsl,imx6sl-epdc";
+        reg = <0x020f4000 0x4000>;
+        interrupts = <0 97 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clks IMX6SL_CLK_EPDC_AXI>, <&clks IMX6SL_CLK_EPDC_PIX>;
+        clock-names = "axi", "pix";
+
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_epdc0>;
+        V3P3-supply = <&V3P3_reg>;
+        VCOM-supply = <&VCOM_reg>;
+        DISPLAY-supply = <&DISPLAY_reg>;
+        epd-thermal-zone = "epd-thermal";
+
+        vscan-holdoff = <4>;
+        sdoed-width = <10>;
+        sdoed-delay = <20>;
+        sdoez-width = <10>;
+        sdoez-delay = <20>;
+        gdclk-hp-offs = <562>;
+        gdsp-offs = <662>;
+        gdoe-offs = <0>;
+        gdclk-offs = <225>;
+        num-ce = <3>;
+        status = "okay";
+
+        timing {
+                clock-frequency = <80000000>;
+                hactive = <1448>;
+                hback-porch = <16>;
+                hfront-porch = <102>;
+                hsync-len = <28>;
+                vactive = <1072>;
+                vback-porch = <4>;
+                vfront-porch = <4>;
+                vsync-len = <2>;
+        };
+    };
+...

arch/arm/boot/dts/nxp/imx/e60k02.dtsi

@@ -73,6 +73,38 @@
 	};
 };
 
+&epdc {
+	safe-ticks-turnoff-ep3v3=<800>;
+	V3P3-supply = <&V3P3_reg>;      
+	VCOM-supply = <&VCOM_reg>;      
+	DISPLAY-supply = <&DISPLAY_reg>; 
+	epd-thermal-zone = "epd-thermal";
+
+	vscan-holdoff = <4>;
+	sdoed-width = <10>;
+	sdoed-delay = <20>;
+	sdoez-width = <10>;
+	sdoez-delay = <20>;
+	gdclk-hp-offs = <562>;
+	gdsp-offs = <662>;
+	gdoe-offs = <0>;
+	gdclk-offs = <225>;
+	num-ce = <3>;
+
+	status = "okay";
+
+	timing {
+		clock-frequency = <80000000>;
+		hactive = <1448>;
+		hback-porch = <16>;
+		hfront-porch = <102>;
+		hsync-len = <28>;
+		vactive = <1072>;
+		vback-porch = <4>;
+		vfront-porch = <4>;
+		vsync-len = <2>;
+	};
+};
 
 &i2c1 {
 	clock-frequency = <100000>;

arch/arm/boot/dts/nxp/imx/imx6sl-tolino-shine2hd.dts

@@ -112,6 +112,40 @@
 	};
 };
 
+&epdc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_epdc0>;
+	safe-ticks-turnoff-ep3v3 = <800>;
+	V3P3-supply = <&V3P3_reg>;
+	VCOM-supply = <&VCOM_reg>;
+	DISPLAY-supply = <&DISPLAY_reg>;
+	epd-thermal-zone = "epd-thermal";
+
+	vscan-holdoff = <4>;
+	sdoed-width = <10>;
+	sdoed-delay = <20>;
+	sdoez-width = <10>;
+	sdoez-delay = <20>;
+	gdclk-hp-offs = <562>;
+	gdsp-offs = <662>;
+	gdoe-offs = <0>;
+	gdclk-offs = <225>;
+	num-ce = <3>;
+	status = "okay";
+
+	timing {
+		clock-frequency = <80000000>;
+		hactive = <1448>;
+		hback-porch = <16>;
+		hfront-porch = <102>;
+		hsync-len = <28>;
+		vactive = <1072>;
+		vback-porch = <4>;
+		vfront-porch = <4>;
+		vsync-len = <2>;
+	};
+};
+
 &i2c1 {
 	pinctrl-names = "default","sleep";
 	pinctrl-0 = <&pinctrl_i2c1>;
@@ -337,6 +371,36 @@
 		>;
 	};
 
+	pinctrl_epdc0: epdcgrp0 {
+		fsl,pins = <
+			MX6SL_PAD_EPDC_D0__EPDC_DATA00     0x4100b1
+			MX6SL_PAD_EPDC_D1__EPDC_DATA01     0x4100b1
+			MX6SL_PAD_EPDC_D2__EPDC_DATA02     0x4100b1
+			MX6SL_PAD_EPDC_D3__EPDC_DATA03     0x4100b1
+			MX6SL_PAD_EPDC_D4__EPDC_DATA04     0x4100b1
+			MX6SL_PAD_EPDC_D5__EPDC_DATA05     0x4100b1
+			MX6SL_PAD_EPDC_D6__EPDC_DATA06     0x4100b1
+			MX6SL_PAD_EPDC_D7__EPDC_DATA07     0x4100b1
+			MX6SL_PAD_EPDC_D8__EPDC_DATA08     0x4100b1
+			MX6SL_PAD_EPDC_D9__EPDC_DATA09     0x4100b1
+			MX6SL_PAD_EPDC_D10__EPDC_DATA10     0x4100b1
+			MX6SL_PAD_EPDC_D11__EPDC_DATA11     0x4100b1
+			MX6SL_PAD_EPDC_D12__EPDC_DATA12     0x4100b1
+			MX6SL_PAD_EPDC_D13__EPDC_DATA13     0x4100b1
+			MX6SL_PAD_EPDC_D14__EPDC_DATA14     0x4100b1
+			MX6SL_PAD_EPDC_D15__EPDC_DATA15     0x4100b1
+			MX6SL_PAD_EPDC_SDCLK__EPDC_SDCLK_P     0x4100b1
+			MX6SL_PAD_EPDC_SDLE__EPDC_SDLE  0x4100b1
+			MX6SL_PAD_EPDC_SDOE__EPDC_SDOE  0x4100b1
+			MX6SL_PAD_EPDC_SDSHR__EPDC_SDSHR       0x4100b1
+			MX6SL_PAD_EPDC_SDCE0__EPDC_SDCE0       0x4100b1
+			MX6SL_PAD_EPDC_GDCLK__EPDC_GDCLK       0x4100b1
+			MX6SL_PAD_EPDC_GDOE__EPDC_GDOE  0x4100b1
+			MX6SL_PAD_EPDC_GDRL__EPDC_GDRL  0x4100b1
+			MX6SL_PAD_EPDC_GDSP__EPDC_GDSP  0x4100b1
+	       >;
+	};
+
 	pinctrl_hog: hoggrp {
 		fsl,pins = <
 			MX6SL_PAD_LCD_DAT0__GPIO2_IO20	0x79

arch/arm/boot/dts/nxp/imx/imx6sl-tolino-shine3.dts

@@ -26,6 +26,11 @@
 	compatible = "kobo,tolino-shine3", "fsl,imx6sl";
 };
 
+&epdc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_epdc0>;
+};
+
 &gpio_keys {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_gpio_keys>;
@@ -59,6 +64,36 @@
 		>;
 	};
 
+	pinctrl_epdc0: epdcgrp0 {
+		fsl,pins = <
+			MX6SL_PAD_EPDC_D0__EPDC_DATA00     0x4100b1
+			MX6SL_PAD_EPDC_D1__EPDC_DATA01     0x4100b1
+			MX6SL_PAD_EPDC_D2__EPDC_DATA02     0x4100b1
+			MX6SL_PAD_EPDC_D3__EPDC_DATA03     0x4100b1
+			MX6SL_PAD_EPDC_D4__EPDC_DATA04     0x4100b1
+			MX6SL_PAD_EPDC_D5__EPDC_DATA05     0x4100b1
+			MX6SL_PAD_EPDC_D6__EPDC_DATA06     0x4100b1
+			MX6SL_PAD_EPDC_D7__EPDC_DATA07     0x4100b1
+			MX6SL_PAD_EPDC_D8__EPDC_DATA08     0x4100b1
+			MX6SL_PAD_EPDC_D9__EPDC_DATA09     0x4100b1
+			MX6SL_PAD_EPDC_D10__EPDC_DATA10     0x4100b1
+			MX6SL_PAD_EPDC_D11__EPDC_DATA11     0x4100b1
+			MX6SL_PAD_EPDC_D12__EPDC_DATA12     0x4100b1
+			MX6SL_PAD_EPDC_D13__EPDC_DATA13     0x4100b1
+			MX6SL_PAD_EPDC_D14__EPDC_DATA14     0x4100b1
+			MX6SL_PAD_EPDC_D15__EPDC_DATA15     0x4100b1
+			MX6SL_PAD_EPDC_SDCLK__EPDC_SDCLK_P     0x4100b1
+			MX6SL_PAD_EPDC_SDLE__EPDC_SDLE  0x4100b1
+			MX6SL_PAD_EPDC_SDOE__EPDC_SDOE  0x4100b1
+			MX6SL_PAD_EPDC_SDSHR__EPDC_SDSHR       0x4100b1
+			MX6SL_PAD_EPDC_SDCE0__EPDC_SDCE0       0x4100b1
+			MX6SL_PAD_EPDC_GDCLK__EPDC_GDCLK       0x4100b1
+			MX6SL_PAD_EPDC_GDOE__EPDC_GDOE  0x4100b1
+			MX6SL_PAD_EPDC_GDRL__EPDC_GDRL  0x4100b1
+			MX6SL_PAD_EPDC_GDSP__EPDC_GDSP  0x4100b1
+	       >;
+	};
+
 	pinctrl_gpio_keys: gpio-keysgrp {
 		fsl,pins = <
 			MX6SL_PAD_SD1_DAT1__GPIO5_IO08	0x17059	/* PWR_SW */

arch/arm/boot/dts/nxp/imx/imx6sl.dtsi

@@ -771,8 +771,11 @@
 			};
 
 			epdc: epdc@20f4000 {
+				compatible = "fsl,imx6sl-epdc", "fsl,imx6dl-epdc";
 				reg = <0x020f4000 0x4000>;
 				interrupts = <0 97 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SL_CLK_EPDC_AXI>, <&clks IMX6SL_CLK_EPDC_PIX>;
+				clock-names = "epdc_axi", "epdc_pix";
 			};
 
 			lcdif: lcdif@20f8000 {

arch/arm/boot/dts/nxp/imx/imx6sll-kobo-clarahd.dts

@@ -36,6 +36,11 @@
 	soc-supply = <&dcdc1_reg>;
 };
 
+&epdc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_epdc0>;
+};
+
 &gpio_keys {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_gpio_keys>;
@@ -69,6 +74,36 @@
 		>;
 	};
 
+	pinctrl_epdc0: epdcgrp0 {
+		fsl,pins = <
+			MX6SLL_PAD_EPDC_DATA00__EPDC_DATA00     0x4100b1
+			MX6SLL_PAD_EPDC_DATA01__EPDC_DATA01     0x4100b1
+			MX6SLL_PAD_EPDC_DATA02__EPDC_DATA02     0x4100b1
+			MX6SLL_PAD_EPDC_DATA03__EPDC_DATA03     0x4100b1
+			MX6SLL_PAD_EPDC_DATA04__EPDC_DATA04     0x4100b1
+			MX6SLL_PAD_EPDC_DATA05__EPDC_DATA05     0x4100b1
+			MX6SLL_PAD_EPDC_DATA06__EPDC_DATA06     0x4100b1
+			MX6SLL_PAD_EPDC_DATA07__EPDC_DATA07     0x4100b1
+			MX6SLL_PAD_EPDC_DATA08__EPDC_DATA08     0x4100b1
+			MX6SLL_PAD_EPDC_DATA09__EPDC_DATA09     0x4100b1
+			MX6SLL_PAD_EPDC_DATA10__EPDC_DATA10     0x4100b1
+			MX6SLL_PAD_EPDC_DATA11__EPDC_DATA11     0x4100b1
+			MX6SLL_PAD_EPDC_DATA12__EPDC_DATA12     0x4100b1
+			MX6SLL_PAD_EPDC_DATA13__EPDC_DATA13     0x4100b1
+			MX6SLL_PAD_EPDC_DATA14__EPDC_DATA14     0x4100b1
+			MX6SLL_PAD_EPDC_DATA15__EPDC_DATA15     0x4100b1
+			MX6SLL_PAD_EPDC_SDCLK__EPDC_SDCLK_P     0x4100b1
+			MX6SLL_PAD_EPDC_SDLE__EPDC_SDLE	 0x4100b1
+			MX6SLL_PAD_EPDC_SDOE__EPDC_SDOE	 0x4100b1
+			MX6SLL_PAD_EPDC_SDSHR__EPDC_SDSHR       0x4100b1
+			MX6SLL_PAD_EPDC_SDCE0__EPDC_SDCE0       0x4100b1
+			MX6SLL_PAD_EPDC_GDCLK__EPDC_GDCLK       0x4100b1
+			MX6SLL_PAD_EPDC_GDOE__EPDC_GDOE	 0x4100b1
+			MX6SLL_PAD_EPDC_GDRL__EPDC_GDRL	 0x4100b1
+			MX6SLL_PAD_EPDC_GDSP__EPDC_GDSP	 0x4100b1
+	       >;
+	};
+
 	pinctrl_gpio_keys: gpio-keysgrp {
 		fsl,pins = <
 			MX6SLL_PAD_SD1_DATA1__GPIO5_IO08	0x17059	/* PWR_SW */

arch/arm/boot/dts/nxp/imx/imx6sll.dtsi

@@ -656,6 +656,15 @@
 				clock-names = "axi";
 			};
 
+			epdc: epdc@20f4000 {
+				compatible = "fsl,imx6sll-epdc", "fsl,imx7d-epdc";
+				reg = <0x020f4000 0x4000>;
+				interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_EPDC_AXI>, <&clks IMX6SLL_CLK_EPDC_PIX>;
+				clock-names = "epdc_axi", "epdc_pix";
+				status = "disabled";
+			};
+
 			lcdif: lcd-controller@20f8000 {
 				compatible = "fsl,imx6sll-lcdif", "fsl,imx28-lcdif";
 				reg = <0x020f8000 0x4000>;

arch/arm/configs/wario_defconfig

@@ -0,0 +1,494 @@
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=18
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_BPF=y
+CONFIG_NAMESPACES=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_PERF_EVENTS=y
+CONFIG_KEXEC=y
+CONFIG_ARCH_MULTI_V6=y
+CONFIG_ARCH_MXC=y
+CONFIG_SOC_IMX31=y
+CONFIG_SOC_IMX35=y
+CONFIG_SOC_IMX50=y
+CONFIG_SOC_IMX51=y
+CONFIG_SOC_IMX53=y
+CONFIG_SOC_IMX6Q=y
+CONFIG_SOC_IMX6SL=y
+CONFIG_SOC_IMX6SLL=y
+CONFIG_SOC_IMX6SX=y
+CONFIG_SOC_IMX6UL=y
+CONFIG_SOC_IMX7D=y
+CONFIG_SOC_IMX7ULP=y
+CONFIG_SOC_VF610=y
+CONFIG_SMP=y
+CONFIG_ARM_PSCI=y
+CONFIG_HIGHMEM=y
+CONFIG_ARCH_FORCE_MAX_ORDER=13
+CONFIG_CMDLINE="noinitrd console=ttymxc0,115200"
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_STAT=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_GOV_POWERSAVE=y
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
+CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
+CONFIG_CPUFREQ_DT=y
+CONFIG_ARM_IMX6Q_CPUFREQ=y
+CONFIG_ARM_IMX_CPUFREQ_DT=y
+CONFIG_CPU_IDLE=y
+CONFIG_ARM_CPUIDLE=y
+CONFIG_ARM_PSCI_CPUIDLE=y
+CONFIG_VFP=y
+CONFIG_NEON=y
+CONFIG_PM_DEBUG=y
+CONFIG_PM_TEST_SUSPEND=y
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODVERSIONS=y
+CONFIG_MODULE_SRCVERSION_ALL=y
+CONFIG_BINFMT_MISC=m
+# CONFIG_COMPAT_BRK is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_NETFILTER=y
+CONFIG_CAN=y
+CONFIG_BT=y
+CONFIG_BT_BNEP=m
+CONFIG_BT_HCIUART=y
+CONFIG_BT_HCIUART_LL=y
+CONFIG_BT_NXPUART=m
+CONFIG_CFG80211=y
+CONFIG_CFG80211_WEXT=y
+CONFIG_MAC80211=y
+CONFIG_RFKILL=y
+CONFIG_RFKILL_INPUT=y
+CONFIG_PCI=y
+CONFIG_PCI_MSI=y
+CONFIG_PCI_IMX6_HOST=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_EXTRA_FIRMWARE="ath6k/AR6003/hw2.1.1/bdata.SD31.bin ath6k/AR6003/hw2.1.1/athwlan.bin ath6k/AR6003/hw2.1.1/otp.bin ath6k/AR6003/hw2.1.1/data.patch.bin"
+CONFIG_IMX_WEIM=y
+CONFIG_CONNECTOR=y
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_CFI_STAA=y
+CONFIG_MTD_PHYSMAP=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_DATAFLASH=y
+CONFIG_MTD_SST25L=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_MTD_NAND_GPMI_NAND=y
+CONFIG_MTD_NAND_VF610_NFC=y
+CONFIG_MTD_NAND_MXC=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_FASTMAP=y
+CONFIG_MTD_UBI_BLOCK=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=65536
+CONFIG_EEPROM_AT24=y
+CONFIG_EEPROM_AT25=y
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+# CONFIG_BLK_DEV_BSG is not set
+CONFIG_SCSI_CONSTANTS=y
+CONFIG_SCSI_LOGGING=y
+CONFIG_SCSI_SCAN_ASYNC=y
+CONFIG_ATA=y
+CONFIG_SATA_AHCI_PLATFORM=y
+CONFIG_AHCI_IMX=y
+CONFIG_PATA_IMX=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_BROADCOM is not set
+CONFIG_CS89x0_PLATFORM=y
+# CONFIG_NET_VENDOR_FARADAY is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MICROCHIP is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+CONFIG_QCA7000_SPI=m
+# CONFIG_NET_VENDOR_SEEQ is not set
+CONFIG_SMC91X=y
+CONFIG_SMSC911X=y
+# CONFIG_NET_VENDOR_STMICRO is not set
+CONFIG_MICREL_PHY=y
+CONFIG_AT803X_PHY=y
+CONFIG_DP83867_PHY=y
+CONFIG_CAN_FLEXCAN=y
+CONFIG_USB_PEGASUS=m
+CONFIG_USB_RTL8150=m
+CONFIG_USB_RTL8152=y
+CONFIG_USB_LAN78XX=y
+CONFIG_USB_USBNET=y
+CONFIG_USB_NET_CDC_EEM=m
+CONFIG_USB_NET_SMSC95XX=y
+CONFIG_USB_NET_MCS7830=y
+CONFIG_ATH6KL=y
+CONFIG_ATH6KL_SDIO=y
+CONFIG_ATH10K=m
+CONFIG_ATH10K_SDIO=m
+CONFIG_BRCMFMAC=m
+CONFIG_MWIFIEX=m
+CONFIG_MWIFIEX_SDIO=m
+CONFIG_MWIFIEX_PCIE=m
+CONFIG_WL12XX=m
+CONFIG_WL18XX=m
+CONFIG_WLCORE_SDIO=m
+CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_GPIO=y
+CONFIG_KEYBOARD_SNVS_PWRKEY=y
+CONFIG_KEYBOARD_IMX=y
+CONFIG_MOUSE_PS2=m
+CONFIG_MOUSE_PS2_ELANTECH=y
+CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_TOUCHSCREEN_ADS7846=y
+CONFIG_TOUCHSCREEN_AD7879=y
+CONFIG_TOUCHSCREEN_AD7879_I2C=y
+CONFIG_TOUCHSCREEN_ATMEL_MXT=y
+CONFIG_TOUCHSCREEN_CYTTSP_CORE=m
+CONFIG_TOUCHSCREEN_CYTTSP_I2C=m
+CONFIG_TOUCHSCREEN_CYTTSP4_CORE=m
+CONFIG_TOUCHSCREEN_CYTTSP4_I2C=m
+CONFIG_TOUCHSCREEN_CYTTSP5=y
+CONFIG_TOUCHSCREEN_DA9052=y
+CONFIG_TOUCHSCREEN_EGALAX=y
+CONFIG_TOUCHSCREEN_GOODIX=y
+CONFIG_TOUCHSCREEN_ILI210X=y
+CONFIG_TOUCHSCREEN_MAX11801=y
+CONFIG_TOUCHSCREEN_IMX6UL_TSC=y
+CONFIG_TOUCHSCREEN_EDT_FT5X06=y
+CONFIG_TOUCHSCREEN_MC13783=y
+CONFIG_TOUCHSCREEN_TSC2004=y
+CONFIG_TOUCHSCREEN_TSC2007=y
+CONFIG_TOUCHSCREEN_STMPE=y
+CONFIG_TOUCHSCREEN_SX8654=y
+CONFIG_TOUCHSCREEN_COLIBRI_VF50=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_MMA8450=y
+CONFIG_INPUT_GPIO_BEEPER=m
+CONFIG_INPUT_UINPUT=m
+CONFIG_SERIO_SERPORT=m
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_IMX=y
+CONFIG_SERIAL_IMX_CONSOLE=y
+CONFIG_SERIAL_FSL_LPUART=y
+CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
+CONFIG_SERIAL_DEV_BUS=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MUX_GPIO=y
+# CONFIG_I2C_HELPER_AUTO is not set
+CONFIG_I2C_ALGOPCF=m
+CONFIG_I2C_ALGOPCA=m
+CONFIG_I2C_GPIO=y
+CONFIG_I2C_IMX=y
+CONFIG_SPI=y
+CONFIG_SPI_FSL_QUADSPI=y
+CONFIG_SPI_GPIO=y
+CONFIG_SPI_IMX=y
+CONFIG_SPI_FSL_DSPI=y
+CONFIG_PINCTRL_IMX8MM=y
+CONFIG_PINCTRL_IMX8MN=y
+CONFIG_PINCTRL_IMX8MP=y
+CONFIG_PINCTRL_IMX8MQ=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_MXC=y
+CONFIG_GPIO_SIOX=m
+CONFIG_GPIO_MAX732X=y
+CONFIG_GPIO_PCA953X=y
+CONFIG_GPIO_PCA953X_IRQ=y
+CONFIG_GPIO_PCF857X=y
+CONFIG_GPIO_BD71815=y
+CONFIG_GPIO_STMPE=y
+CONFIG_GPIO_74X164=y
+CONFIG_W1=m
+CONFIG_W1_MASTER_DS2482=m
+CONFIG_W1_SLAVE_THERM=m
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+CONFIG_POWER_RESET_SYSCON_POWEROFF=y
+CONFIG_RN5T618_POWER=m
+CONFIG_SENSORS_MC13783_ADC=y
+CONFIG_SENSORS_GPIO_FAN=y
+CONFIG_SENSORS_IIO_HWMON=y
+CONFIG_SENSORS_JC42=m
+CONFIG_SENSORS_LM75=m
+CONFIG_SENSORS_PWM_FAN=y
+CONFIG_SENSORS_SY7636A=y
+CONFIG_THERMAL_STATISTICS=y
+CONFIG_CPU_THERMAL=y
+CONFIG_IMX_THERMAL=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_SYSFS=y
+CONFIG_DA9063_WATCHDOG=m
+CONFIG_DA9062_WATCHDOG=y
+CONFIG_RN5T618_WATCHDOG=y
+CONFIG_IMX2_WDT=y
+CONFIG_IMX7ULP_WDT=y
+CONFIG_MFD_DA9052_I2C=y
+CONFIG_MFD_DA9062=y
+CONFIG_MFD_DA9063=y
+CONFIG_MFD_MC13XXX_SPI=y
+CONFIG_MFD_MC13XXX_I2C=y
+CONFIG_MFD_SY7636A=y
+CONFIG_MFD_RN5T618=y
+CONFIG_MFD_STMPE=y
+CONFIG_MFD_ROHM_BD71828=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_REGULATOR_ANATOP=y
+CONFIG_REGULATOR_BD71815=y
+CONFIG_REGULATOR_BD71828=y
+CONFIG_REGULATOR_DA9052=y
+CONFIG_REGULATOR_DA9062=y
+CONFIG_REGULATOR_DA9063=y
+CONFIG_REGULATOR_GPIO=y
+CONFIG_REGULATOR_LTC3676=y
+CONFIG_REGULATOR_MAX77696=m
+CONFIG_REGULATOR_MC13783=y
+CONFIG_REGULATOR_MC13892=y
+CONFIG_REGULATOR_PFUZE100=y
+CONFIG_REGULATOR_RN5T618=y
+CONFIG_REGULATOR_SY7636A=y
+CONFIG_RC_CORE=y
+CONFIG_RC_DEVICES=y
+CONFIG_IR_GPIO_CIR=y
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_MEDIA_USB_SUPPORT=y
+CONFIG_USB_VIDEO_CLASS=m
+CONFIG_V4L_PLATFORM_DRIVERS=y
+CONFIG_V4L_MEM2MEM_DRIVERS=y
+CONFIG_VIDEO_MUX=y
+CONFIG_VIDEO_CODA=m
+CONFIG_VIDEO_IMX_PXP=y
+CONFIG_VIDEO_OV2680=m
+CONFIG_VIDEO_OV5640=m
+CONFIG_VIDEO_OV5645=m
+CONFIG_VIDEO_ADV7180=m
+CONFIG_IMX_IPUV3_CORE=y
+CONFIG_DRM=y
+CONFIG_DRM_MSM=y
+CONFIG_DRM_PANEL_LVDS=y
+CONFIG_DRM_PANEL_SEIKO_43WVF1G=y
+CONFIG_DRM_PANEL_EDP=y
+CONFIG_DRM_PANEL_SIMPLE=y
+CONFIG_DRM_DISPLAY_CONNECTOR=y
+CONFIG_DRM_I2C_NXP_TDA998X=y
+CONFIG_DRM_LVDS_CODEC=m
+CONFIG_DRM_SII902X=y
+CONFIG_DRM_TI_TFP410=y
+CONFIG_DRM_DW_HDMI_AHB_AUDIO=m
+CONFIG_DRM_DW_HDMI_CEC=y
+CONFIG_DRM_IMX=y
+CONFIG_DRM_IMX_PARALLEL_DISPLAY=y
+CONFIG_DRM_IMX_TVE=y
+CONFIG_DRM_IMX_LDB=y
+CONFIG_DRM_IMX_HDMI=y
+CONFIG_DRM_ETNAVIV=y
+CONFIG_DRM_MXSFB=y
+CONFIG_DRM_MXC_EPDC=m
+CONFIG_FB=y
+CONFIG_FB_MODE_HELPERS=y
+CONFIG_LCD_CLASS_DEVICE=y
+CONFIG_LCD_L4F00242T03=y
+CONFIG_LCD_PLATFORM=y
+CONFIG_BACKLIGHT_CLASS_DEVICE=y
+CONFIG_BACKLIGHT_PWM=y
+CONFIG_BACKLIGHT_MAX77696=m
+CONFIG_BACKLIGHT_GPIO=y
+CONFIG_LOGO=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_USB_AUDIO=m
+CONFIG_SND_SOC=y
+CONFIG_SND_SOC_FSL_ASRC=y
+CONFIG_SND_IMX_SOC=y
+CONFIG_SND_SOC_EUKREA_TLV320=y
+CONFIG_SND_SOC_IMX_ES8328=y
+CONFIG_SND_SOC_IMX_SGTL5000=y
+CONFIG_SND_SOC_FSL_ASOC_CARD=y
+CONFIG_SND_SOC_AC97_CODEC=y
+CONFIG_SND_SOC_CS42XX8_I2C=y
+CONFIG_SND_SOC_SPDIF=y
+CONFIG_SND_SOC_TLV320AIC3X_I2C=y
+CONFIG_SND_SOC_WM8960=y
+CONFIG_SND_SOC_WM8962=y
+CONFIG_SND_SIMPLE_CARD=y
+CONFIG_HID_MULTITOUCH=y
+CONFIG_HID_WACOM=y
+CONFIG_I2C_HID_OF=y
+CONFIG_USB=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_ACM=m
+CONFIG_USB_STORAGE=y
+CONFIG_USB_CHIPIDEA=y
+CONFIG_USB_CHIPIDEA_UDC=y
+CONFIG_USB_CHIPIDEA_HOST=y
+CONFIG_USB_SERIAL=m
+CONFIG_USB_SERIAL_GENERIC=y
+CONFIG_USB_SERIAL_FTDI_SIO=m
+CONFIG_USB_SERIAL_OPTION=m
+CONFIG_USB_TEST=m
+CONFIG_USB_EHSET_TEST_FIXTURE=m
+CONFIG_USB_ONBOARD_DEV=y
+CONFIG_NOP_USB_XCEIV=y
+CONFIG_USB_MXS_PHY=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_CONFIGFS=y
+CONFIG_USB_CONFIGFS_SERIAL=y
+CONFIG_USB_CONFIGFS_ACM=y
+CONFIG_USB_CONFIGFS_OBEX=y
+CONFIG_USB_CONFIGFS_NCM=y
+CONFIG_USB_CONFIGFS_ECM=y
+CONFIG_USB_CONFIGFS_ECM_SUBSET=y
+CONFIG_USB_CONFIGFS_RNDIS=y
+CONFIG_USB_CONFIGFS_EEM=y
+CONFIG_USB_CONFIGFS_MASS_STORAGE=y
+CONFIG_USB_CONFIGFS_F_LB_SS=y
+CONFIG_USB_CONFIGFS_F_FS=y
+CONFIG_USB_CONFIGFS_F_UAC1=y
+CONFIG_USB_CONFIGFS_F_UAC2=y
+CONFIG_USB_CONFIGFS_F_MIDI=y
+CONFIG_USB_CONFIGFS_F_HID=y
+CONFIG_USB_CONFIGFS_F_UVC=y
+CONFIG_USB_CONFIGFS_F_PRINTER=y
+CONFIG_USB_ZERO=m
+CONFIG_USB_AUDIO=m
+CONFIG_USB_ETH=m
+CONFIG_USB_G_NCM=m
+CONFIG_USB_GADGETFS=m
+CONFIG_USB_FUNCTIONFS=m
+CONFIG_USB_MASS_STORAGE=m
+CONFIG_USB_G_SERIAL=m
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_SDHCI_ESDHC_IMX=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_PWM=y
+CONFIG_LEDS_TRIGGER_TIMER=y
+CONFIG_LEDS_TRIGGER_ONESHOT=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_LEDS_TRIGGER_BACKLIGHT=y
+CONFIG_LEDS_TRIGGER_GPIO=y
+CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_INTF_DEV_UIE_EMUL=y
+CONFIG_RTC_DRV_DS1307=y
+CONFIG_RTC_DRV_ISL1208=y
+CONFIG_RTC_DRV_PCF8523=y
+CONFIG_RTC_DRV_PCF8563=y
+CONFIG_RTC_DRV_M41T80=y
+CONFIG_RTC_DRV_BD70528=y
+CONFIG_RTC_DRV_RC5T619=y
+CONFIG_RTC_DRV_RV3029C2=y
+CONFIG_RTC_DRV_DA9063=y
+CONFIG_RTC_DRV_MC13XXX=y
+CONFIG_RTC_DRV_MXC=y
+CONFIG_RTC_DRV_MXC_V2=y
+CONFIG_RTC_DRV_SNVS=y
+CONFIG_DMADEVICES=y
+CONFIG_FSL_EDMA=y
+CONFIG_IMX_SDMA=m
+CONFIG_MXS_DMA=y
+CONFIG_DMATEST=m
+CONFIG_STAGING=y
+CONFIG_STAGING_MEDIA=y
+CONFIG_VIDEO_IMX_MEDIA=y
+CONFIG_COMMON_CLK_PWM=y
+CONFIG_COMMON_CLK_BD718XX=y
+CONFIG_CLK_IMX8MM=y
+CONFIG_CLK_IMX8MN=y
+CONFIG_CLK_IMX8MP=y
+CONFIG_CLK_IMX8MQ=y
+CONFIG_SOC_IMX8M=y
+CONFIG_EXTCON_USB_GPIO=y
+CONFIG_IIO=y
+CONFIG_IIO_ST_ACCEL_3AXIS=m
+CONFIG_MMA8452=y
+CONFIG_IMX7D_ADC=y
+CONFIG_RN5T618_ADC=y
+CONFIG_STMPE_ADC=y
+CONFIG_VF610_ADC=y
+CONFIG_SENSORS_ISL29018=y
+CONFIG_MAG3110=y
+CONFIG_MPL3115=y
+CONFIG_PWM=y
+CONFIG_PWM_FSL_FTM=y
+CONFIG_PWM_IMX27=y
+CONFIG_PWM_IMX_TPM=y
+CONFIG_NVMEM_IMX_OCOTP=y
+CONFIG_NVMEM_SNVS_LPGPR=y
+CONFIG_NVMEM_VF610_OCOTP=y
+CONFIG_TEE=y
+CONFIG_OPTEE=y
+CONFIG_MUX_MMIO=y
+CONFIG_SIOX=m
+CONFIG_SIOX_BUS_GPIO=m
+CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_XATTR=y
+CONFIG_EXT2_FS_POSIX_ACL=y
+CONFIG_EXT2_FS_SECURITY=y
+CONFIG_EXT3_FS=y
+CONFIG_EXT3_FS_POSIX_ACL=y
+CONFIG_EXT3_FS_SECURITY=y
+CONFIG_QUOTA=y
+CONFIG_QUOTA_NETLINK_INTERFACE=y
+CONFIG_AUTOFS_FS=y
+CONFIG_FUSE_FS=y
+CONFIG_ISO9660_FS=m
+CONFIG_JOLIET=y
+CONFIG_ZISOFS=y
+CONFIG_UDF_FS=m
+CONFIG_MSDOS_FS=m
+CONFIG_VFAT_FS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_JFFS2_FS=y
+CONFIG_UBIFS_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_V4_1=y
+CONFIG_NFS_V4_2=y
+CONFIG_ROOT_NFS=y
+CONFIG_NLS_DEFAULT="cp437"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_ISO8859_15=m
+CONFIG_NLS_UTF8=y
+CONFIG_SECURITYFS=y
+CONFIG_CRYPTO_DEV_FSL_CAAM=y
+CONFIG_CRYPTO_DEV_SAHARA=y
+CONFIG_CRYPTO_DEV_MXS_DCP=y
+CONFIG_CMA_SIZE_MBYTES=64
+CONFIG_FONTS=y
+CONFIG_FONT_8x8=y
+CONFIG_FONT_8x16=y
+CONFIG_PRINTK_TIME=y
+# CONFIG_DEBUG_BUGVERBOSE is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_FS=y
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_FTRACE is not set

drivers/gpu/drm/Kconfig

@@ -460,6 +460,8 @@ source "drivers/gpu/drm/sprd/Kconfig"
 
 source "drivers/gpu/drm/imagination/Kconfig"
 
+source "drivers/gpu/drm/mxc-epdc/Kconfig"
+
 config DRM_HYPERV
 	tristate "DRM Support for Hyper-V synthetic video device"
 	depends on DRM && PCI && MMU && HYPERV

drivers/gpu/drm/Makefile

@@ -216,6 +216,7 @@ obj-$(CONFIG_DRM_PANTHOR) += panthor/
 obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
 obj-$(CONFIG_DRM_MCDE) += mcde/
 obj-$(CONFIG_DRM_TIDSS) += tidss/
+obj-$(CONFIG_DRM_MXC_EPDC) += mxc-epdc/
 obj-y			+= xlnx/
 obj-y			+= gud/
 obj-$(CONFIG_DRM_HYPERV) += hyperv/

drivers/gpu/drm/mxc-epdc/Kconfig

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+config DRM_MXC_EPDC
+	tristate "i.MX EPD Controller"
+	depends on DRM && OF
+	depends on (COMPILE_TEST || ARCH_MXC)
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_TTM_HELPER
+	select DRM_CLIENT_SELECTION
+	select DMA_CMA if HAVE_DMA_CONTIGUOUS
+	select CMA if HAVE_DMA_CONTIGUOUS
+	select VIDEOMODE_HELPERS
+	help
+	  Choose this option if you have an i.MX system with an EPDC.
+
+	  If M is selected this module will be called mxc_epdc_drm.

drivers/gpu/drm/mxc-epdc/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+mxc_epdc_drm-y := mxc_epdc_drv.o epdc_hw.o epdc_update.o epdc_waveform.o
+
+obj-$(CONFIG_DRM_MXC_EPDC) += mxc_epdc_drm.o
+

drivers/gpu/drm/mxc-epdc/epdc_hw.c

@@ -0,0 +1,497 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (C) 2020 Andreas Kemnade
+//
+/*
+ * based on the EPDC framebuffer driver
+ * Copyright (C) 2010-2016 Freescale Semiconductor, Inc.
+ * Copyright 2017 NXP
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+
+#include "mxc_epdc.h"
+#include "epdc_regs.h"
+#include "epdc_hw.h"
+/* TODO: should probably be untangled */
+#include "epdc_update.h"
+#include "epdc_waveform.h"
+
+void mxc_epdc_powerup(struct mxc_epdc *priv)
+{
+	int ret = 0;
+
+	mutex_lock(&priv->power_mutex);
+
+	/*
+	 * If power down request is pending, clear
+	 * powering_down to cancel the request.
+	 */
+	if (priv->powering_down)
+		priv->powering_down = false;
+
+	if (priv->powered) {
+		mutex_unlock(&priv->power_mutex);
+		return;
+	}
+
+	dev_dbg(priv->drm.dev, "EPDC Powerup\n");
+
+	priv->updates_active = true;
+
+	/* Enable the v3p3 regulator */
+	ret = regulator_enable(priv->v3p3_regulator);
+	if (IS_ERR((void *)ret)) {
+		dev_err(priv->drm.dev,
+			"Unable to enable V3P3 regulator. err = 0x%x\n",
+			ret);
+		mutex_unlock(&priv->power_mutex);
+		return;
+	}
+
+	usleep_range(1000, 2000);
+
+	pm_runtime_get_sync(priv->drm.dev);
+
+	/* Enable clocks to EPDC */
+	clk_prepare_enable(priv->epdc_clk_axi);
+	clk_prepare_enable(priv->epdc_clk_pix);
+
+	epdc_write(priv, EPDC_CTRL_CLEAR, EPDC_CTRL_CLKGATE);
+
+	/* Enable power to the EPD panel */
+	ret = regulator_enable(priv->display_regulator);
+	if (IS_ERR((void *)ret)) {
+		dev_err(priv->drm.dev,
+			"Unable to enable DISPLAY regulator. err = 0x%x\n",
+			ret);
+		mutex_unlock(&priv->power_mutex);
+		return;
+	}
+	ret = regulator_enable(priv->vcom_regulator);
+	if (IS_ERR((void *)ret)) {
+		dev_err(priv->drm.dev,
+			"Unable to enable VCOM regulator. err = 0x%x\n",
+			ret);
+		mutex_unlock(&priv->power_mutex);
+		return;
+	}
+
+	priv->powered = true;
+
+	mutex_unlock(&priv->power_mutex);
+}
+
+void mxc_epdc_powerdown(struct mxc_epdc *priv)
+{
+	mutex_lock(&priv->power_mutex);
+
+	/* If powering_down has been cleared, a powerup
+	 * request is pre-empting this powerdown request.
+	 */
+	if (!priv->powering_down
+		|| (!priv->powered)) {
+		mutex_unlock(&priv->power_mutex);
+		return;
+	}
+
+	dev_dbg(priv->drm.dev, "EPDC Powerdown\n");
+
+	/* Disable power to the EPD panel */
+	regulator_disable(priv->vcom_regulator);
+	regulator_disable(priv->display_regulator);
+
+	/* Disable clocks to EPDC */
+	epdc_write(priv, EPDC_CTRL_SET, EPDC_CTRL_CLKGATE);
+	clk_disable_unprepare(priv->epdc_clk_pix);
+	clk_disable_unprepare(priv->epdc_clk_axi);
+
+	pm_runtime_put_sync_suspend(priv->drm.dev);
+
+	/* turn off the V3p3 */
+	regulator_disable(priv->v3p3_regulator);
+
+	priv->powered = false;
+	priv->powering_down = false;
+
+	if (priv->wait_for_powerdown) {
+		priv->wait_for_powerdown = false;
+		complete(&priv->powerdown_compl);
+	}
+
+	mutex_unlock(&priv->power_mutex);
+}
+
+static void epdc_set_horizontal_timing(struct mxc_epdc *priv, u32 horiz_start,
+				       u32 horiz_end,
+				       u32 hsync_width, u32 hsync_line_length)
+{
+	u32 reg_val =
+	    ((hsync_width << EPDC_TCE_HSCAN1_LINE_SYNC_WIDTH_OFFSET) &
+	     EPDC_TCE_HSCAN1_LINE_SYNC_WIDTH_MASK)
+	    | ((hsync_line_length << EPDC_TCE_HSCAN1_LINE_SYNC_OFFSET) &
+	       EPDC_TCE_HSCAN1_LINE_SYNC_MASK);
+	epdc_write(priv, EPDC_TCE_HSCAN1, reg_val);
+
+	reg_val =
+	    ((horiz_start << EPDC_TCE_HSCAN2_LINE_BEGIN_OFFSET) &
+	     EPDC_TCE_HSCAN2_LINE_BEGIN_MASK)
+	    | ((horiz_end << EPDC_TCE_HSCAN2_LINE_END_OFFSET) &
+	       EPDC_TCE_HSCAN2_LINE_END_MASK);
+	epdc_write(priv, EPDC_TCE_HSCAN2, reg_val);
+}
+
+static void epdc_set_vertical_timing(struct mxc_epdc *priv,
+				     u32 vert_start,
+				     u32 vert_end,
+				     u32 vsync_width)
+{
+	u32 reg_val =
+	    ((vert_start << EPDC_TCE_VSCAN_FRAME_BEGIN_OFFSET) &
+	     EPDC_TCE_VSCAN_FRAME_BEGIN_MASK)
+	    | ((vert_end << EPDC_TCE_VSCAN_FRAME_END_OFFSET) &
+	       EPDC_TCE_VSCAN_FRAME_END_MASK)
+	    | ((vsync_width << EPDC_TCE_VSCAN_FRAME_SYNC_OFFSET) &
+	       EPDC_TCE_VSCAN_FRAME_SYNC_MASK);
+	epdc_write(priv, EPDC_TCE_VSCAN, reg_val);
+}
+
+static inline void epdc_set_screen_res(struct mxc_epdc *priv,
+				       u32 width, u32 height)
+{
+	u32 val = (height << EPDC_RES_VERTICAL_OFFSET) | width;
+
+	epdc_write(priv, EPDC_RES, val);
+}
+
+
+void epdc_init_settings(struct mxc_epdc *priv, struct drm_display_mode *m)
+{
+	u32 reg_val;
+	int num_ce;
+	int i;
+
+	/* Enable clocks to access EPDC regs */
+	clk_prepare_enable(priv->epdc_clk_axi);
+	clk_prepare_enable(priv->epdc_clk_pix);
+
+	/* Reset */
+	epdc_write(priv, EPDC_CTRL_SET, EPDC_CTRL_SFTRST);
+	while (!(epdc_read(priv, EPDC_CTRL) & EPDC_CTRL_CLKGATE))
+		;
+	epdc_write(priv, EPDC_CTRL_CLEAR, EPDC_CTRL_SFTRST);
+
+	/* Enable clock gating (clear to enable) */
+	epdc_write(priv, EPDC_CTRL_CLEAR, EPDC_CTRL_CLKGATE);
+	while (epdc_read(priv, EPDC_CTRL) & (EPDC_CTRL_SFTRST | EPDC_CTRL_CLKGATE))
+		;
+
+	/* EPDC_CTRL */
+	reg_val = epdc_read(priv, EPDC_CTRL);
+	reg_val &= ~EPDC_CTRL_UPD_DATA_SWIZZLE_MASK;
+	reg_val |= EPDC_CTRL_UPD_DATA_SWIZZLE_NO_SWAP;
+	reg_val &= ~EPDC_CTRL_LUT_DATA_SWIZZLE_MASK;
+	reg_val |= EPDC_CTRL_LUT_DATA_SWIZZLE_NO_SWAP;
+	epdc_write(priv, EPDC_CTRL_SET, reg_val);
+
+	/* EPDC_FORMAT - 2bit TFT and buf_pix_fmt Buf pixel format */
+	reg_val = EPDC_FORMAT_TFT_PIXEL_FORMAT_2BIT
+		| priv->buf_pix_fmt
+	    | ((0x0 << EPDC_FORMAT_DEFAULT_TFT_PIXEL_OFFSET) &
+	       EPDC_FORMAT_DEFAULT_TFT_PIXEL_MASK);
+	epdc_write(priv, EPDC_FORMAT, reg_val);
+	if (priv->rev >= 30) {
+		if (priv->buf_pix_fmt == EPDC_FORMAT_BUF_PIXEL_FORMAT_P5N) {
+			/* 110 00101 0101 0100*/
+			epdc_write(priv, EPDC_WB_FIELD2, 0xc554);
+			/* 101 00000 0000 0100*/
+			epdc_write(priv, EPDC_WB_FIELD1, 0xa004);
+		} else {
+			/* 110 00101 0101 0100*/
+			epdc_write(priv, EPDC_WB_FIELD2, 0xc443);
+			/* 101 00000 0000 0100*/
+			epdc_write(priv, EPDC_WB_FIELD1, 0xa003);
+		}
+	}
+
+	/* EPDC_FIFOCTRL (disabled) */
+	reg_val =
+	    ((100 << EPDC_FIFOCTRL_FIFO_INIT_LEVEL_OFFSET) &
+	     EPDC_FIFOCTRL_FIFO_INIT_LEVEL_MASK)
+	    | ((200 << EPDC_FIFOCTRL_FIFO_H_LEVEL_OFFSET) &
+	       EPDC_FIFOCTRL_FIFO_H_LEVEL_MASK)
+	    | ((100 << EPDC_FIFOCTRL_FIFO_L_LEVEL_OFFSET) &
+	       EPDC_FIFOCTRL_FIFO_L_LEVEL_MASK);
+	epdc_write(priv, EPDC_FIFOCTRL, reg_val);
+
+	/* EPDC_TEMP - Use default temp to get index */
+	epdc_write(priv, EPDC_TEMP,
+		   mxc_epdc_fb_get_temp_index(priv, TEMP_USE_AMBIENT));
+
+	/* EPDC_RES */
+	epdc_set_screen_res(priv, m->hdisplay, m->vdisplay);
+
+	/* EPDC_AUTOWV_LUT */
+	/* Initialize all auto-wavefrom look-up values to 2 - GC16 */
+	for (i = 0; i < 8; i++)
+		epdc_write(priv, EPDC_AUTOWV_LUT,
+			(2 << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+			(i << EPDC_AUTOWV_LUT_ADDR_OFFSET));
+
+	/*
+	 * EPDC_TCE_CTRL
+	 * VSCAN_HOLDOFF = 4
+	 * VCOM_MODE = MANUAL
+	 * VCOM_VAL = 0
+	 * DDR_MODE = DISABLED
+	 * LVDS_MODE_CE = DISABLED
+	 * LVDS_MODE = DISABLED
+	 * DUAL_SCAN = DISABLED
+	 * SDDO_WIDTH = 8bit
+	 * PIXELS_PER_SDCLK = 4
+	 */
+	reg_val =
+	    ((priv->imx_mode.vscan_holdoff << EPDC_TCE_CTRL_VSCAN_HOLDOFF_OFFSET) &
+	     EPDC_TCE_CTRL_VSCAN_HOLDOFF_MASK)
+	    | EPDC_TCE_CTRL_PIXELS_PER_SDCLK_4;
+	epdc_write(priv, EPDC_TCE_CTRL, reg_val);
+
+	/* EPDC_TCE_HSCAN */
+	epdc_set_horizontal_timing(priv, m->hsync_start - m->hdisplay,
+				   m->htotal - m->hsync_end,
+				   m->hsync_end - m->hsync_start,
+				   m->hsync_end - m->hsync_start);
+
+	/* EPDC_TCE_VSCAN */
+	epdc_set_vertical_timing(priv, m->vsync_start - m->vdisplay,
+				 m->vtotal - m->vsync_end,
+				 m->vsync_end - m->vsync_start);
+
+	/* EPDC_TCE_OE */
+	reg_val =
+	    ((priv->imx_mode.sdoed_width << EPDC_TCE_OE_SDOED_WIDTH_OFFSET) &
+	     EPDC_TCE_OE_SDOED_WIDTH_MASK)
+	    | ((priv->imx_mode.sdoed_delay << EPDC_TCE_OE_SDOED_DLY_OFFSET) &
+	       EPDC_TCE_OE_SDOED_DLY_MASK)
+	    | ((priv->imx_mode.sdoez_width << EPDC_TCE_OE_SDOEZ_WIDTH_OFFSET) &
+	       EPDC_TCE_OE_SDOEZ_WIDTH_MASK)
+	    | ((priv->imx_mode.sdoez_delay << EPDC_TCE_OE_SDOEZ_DLY_OFFSET) &
+	       EPDC_TCE_OE_SDOEZ_DLY_MASK);
+	epdc_write(priv, EPDC_TCE_OE, reg_val);
+
+	/* EPDC_TCE_TIMING1 */
+	epdc_write(priv, EPDC_TCE_TIMING1, 0x0);
+
+	/* EPDC_TCE_TIMING2 */
+	reg_val =
+	    ((priv->imx_mode.gdclk_hp_offs << EPDC_TCE_TIMING2_GDCLK_HP_OFFSET) &
+	     EPDC_TCE_TIMING2_GDCLK_HP_MASK)
+	    | ((priv->imx_mode.gdsp_offs << EPDC_TCE_TIMING2_GDSP_OFFSET_OFFSET) &
+	       EPDC_TCE_TIMING2_GDSP_OFFSET_MASK);
+	epdc_write(priv, EPDC_TCE_TIMING2, reg_val);
+
+	/* EPDC_TCE_TIMING3 */
+	reg_val =
+	    ((priv->imx_mode.gdoe_offs << EPDC_TCE_TIMING3_GDOE_OFFSET_OFFSET) &
+	     EPDC_TCE_TIMING3_GDOE_OFFSET_MASK)
+	    | ((priv->imx_mode.gdclk_offs << EPDC_TCE_TIMING3_GDCLK_OFFSET_OFFSET) &
+	       EPDC_TCE_TIMING3_GDCLK_OFFSET_MASK);
+	epdc_write(priv, EPDC_TCE_TIMING3, reg_val);
+
+	/*
+	 * EPDC_TCE_SDCFG
+	 * SDCLK_HOLD = 1
+	 * SDSHR = 1
+	 * NUM_CE = 1
+	 * SDDO_REFORMAT = FLIP_PIXELS
+	 * SDDO_INVERT = DISABLED
+	 * PIXELS_PER_CE = display horizontal resolution
+	 */
+	num_ce = priv->imx_mode.num_ce;
+	if (num_ce == 0)
+		num_ce = 1;
+	reg_val = EPDC_TCE_SDCFG_SDCLK_HOLD | EPDC_TCE_SDCFG_SDSHR
+	    | ((num_ce << EPDC_TCE_SDCFG_NUM_CE_OFFSET) &
+	       EPDC_TCE_SDCFG_NUM_CE_MASK)
+	    | EPDC_TCE_SDCFG_SDDO_REFORMAT_FLIP_PIXELS
+	    | ((priv->epdc_mem_width/num_ce << EPDC_TCE_SDCFG_PIXELS_PER_CE_OFFSET) &
+	       EPDC_TCE_SDCFG_PIXELS_PER_CE_MASK);
+	epdc_write(priv, EPDC_TCE_SDCFG, reg_val);
+
+	/*
+	 * EPDC_TCE_GDCFG
+	 * GDRL = 1
+	 * GDOE_MODE = 0;
+	 * GDSP_MODE = 0;
+	 */
+	reg_val = EPDC_TCE_SDCFG_GDRL;
+	epdc_write(priv, EPDC_TCE_GDCFG, reg_val);
+
+	/*
+	 * EPDC_TCE_POLARITY
+	 * SDCE_POL = ACTIVE LOW
+	 * SDLE_POL = ACTIVE HIGH
+	 * SDOE_POL = ACTIVE HIGH
+	 * GDOE_POL = ACTIVE HIGH
+	 * GDSP_POL = ACTIVE LOW
+	 */
+	reg_val = EPDC_TCE_POLARITY_SDLE_POL_ACTIVE_HIGH
+	    | EPDC_TCE_POLARITY_SDOE_POL_ACTIVE_HIGH
+	    | EPDC_TCE_POLARITY_GDOE_POL_ACTIVE_HIGH;
+	epdc_write(priv, EPDC_TCE_POLARITY, reg_val);
+
+	/* EPDC_IRQ_MASK */
+	epdc_write(priv, EPDC_IRQ_MASK, EPDC_IRQ_TCE_UNDERRUN_IRQ);
+
+	/*
+	 * EPDC_GPIO
+	 * PWRCOM = ?
+	 * PWRCTRL = ?
+	 * BDR = ?
+	 */
+	reg_val = ((0 << EPDC_GPIO_PWRCTRL_OFFSET) & EPDC_GPIO_PWRCTRL_MASK)
+	    | ((0 << EPDC_GPIO_BDR_OFFSET) & EPDC_GPIO_BDR_MASK);
+	epdc_write(priv, EPDC_GPIO, reg_val);
+
+	epdc_write(priv, EPDC_WVADDR, priv->waveform_buffer_phys);
+	epdc_write(priv, EPDC_WB_ADDR, priv->working_buffer_phys);
+	if (priv->rev >= 30)
+		epdc_write(priv, EPDC_WB_ADDR_TCE_V3,
+			   priv->working_buffer_phys);
+	else
+		epdc_write(priv, EPDC_WB_ADDR_TCE,
+			   priv->working_buffer_phys);
+
+	/* Disable clock */
+	clk_disable_unprepare(priv->epdc_clk_axi);
+	clk_disable_unprepare(priv->epdc_clk_pix);
+}
+
+void mxc_epdc_init_sequence(struct mxc_epdc *priv, struct drm_display_mode *m)
+{
+	/* Initialize EPDC, passing pointer to EPDC registers */
+	struct clk *epdc_parent;
+	unsigned long rounded_parent_rate, epdc_pix_rate,
+			rounded_pix_clk, target_pix_clk;
+
+	/* Enable pix clk for EPDC */
+	clk_prepare_enable(priv->epdc_clk_axi);
+
+	target_pix_clk = m->clock * 1000;
+	rounded_pix_clk = clk_round_rate(priv->epdc_clk_pix, target_pix_clk);
+
+	if (((rounded_pix_clk >= target_pix_clk + target_pix_clk/100) ||
+		(rounded_pix_clk <= target_pix_clk - target_pix_clk/100))) {
+		/* Can't get close enough without changing parent clk */
+		epdc_parent = clk_get_parent(priv->epdc_clk_pix);
+		rounded_parent_rate = clk_round_rate(epdc_parent, target_pix_clk);
+
+		epdc_pix_rate = target_pix_clk;
+		while (epdc_pix_rate < rounded_parent_rate)
+			epdc_pix_rate *= 2;
+		clk_set_rate(epdc_parent, epdc_pix_rate);
+
+		rounded_pix_clk = clk_round_rate(priv->epdc_clk_pix, target_pix_clk);
+		if (((rounded_pix_clk >= target_pix_clk + target_pix_clk/100) ||
+			(rounded_pix_clk <= target_pix_clk - target_pix_clk/100)))
+			/* Still can't get a good clock, provide warning */
+			dev_err(priv->drm.dev, "Unable to get an accurate EPDC pix clk"
+				"desired = %lu, actual = %lu\n", target_pix_clk,
+				rounded_pix_clk);
+	}
+
+	clk_set_rate(priv->epdc_clk_pix, rounded_pix_clk);
+	clk_prepare_enable(priv->epdc_clk_pix);
+
+	epdc_init_settings(priv, m);
+
+	priv->in_init = true;
+	mxc_epdc_powerup(priv);
+	mxc_epdc_draw_mode0(priv);
+	/* Force power down event */
+	priv->powering_down = true;
+	mxc_epdc_powerdown(priv);
+	priv->updates_active = false;
+
+	/* Disable clocks */
+	clk_disable_unprepare(priv->epdc_clk_axi);
+	clk_disable_unprepare(priv->epdc_clk_pix);
+	priv->hw_ready = true;
+	priv->hw_initializing = false;
+
+}
+
+int mxc_epdc_init_hw(struct mxc_epdc *priv)
+{
+	struct pinctrl *pinctrl;
+	const char *thermal = NULL;
+	u32 val;
+
+	/* get pmic regulators */
+	priv->display_regulator = devm_regulator_get(priv->drm.dev, "DISPLAY");
+	if (IS_ERR(priv->display_regulator))
+		return dev_err_probe(priv->drm.dev, PTR_ERR(priv->display_regulator),
+				     "Unable to get display PMIC regulator\n");
+
+	priv->vcom_regulator = devm_regulator_get(priv->drm.dev, "VCOM");
+	if (IS_ERR(priv->vcom_regulator))
+		return dev_err_probe(priv->drm.dev, PTR_ERR(priv->vcom_regulator),
+				     "Unable to get VCOM regulator\n");
+
+	priv->v3p3_regulator = devm_regulator_get(priv->drm.dev, "V3P3");
+	if (IS_ERR(priv->v3p3_regulator))
+		return dev_err_probe(priv->drm.dev, PTR_ERR(priv->v3p3_regulator),
+				     "Unable to get V3P3 regulator\n");
+
+	of_property_read_string(priv->drm.dev->of_node,
+				"epd-thermal-zone", &thermal);
+	if (thermal) {
+		priv->thermal = thermal_zone_get_zone_by_name(thermal);
+		if (IS_ERR(priv->thermal))
+			return dev_err_probe(priv->drm.dev, PTR_ERR(priv->thermal),
+					     "unable to get thermal");
+	}
+	priv->iobase = devm_platform_get_and_ioremap_resource(to_platform_device(priv->drm.dev),
+							      0, NULL);
+	if (priv->iobase == NULL)
+		return -ENOMEM;
+
+//	priv->auto_mode = AUTO_UPDATE_MODE_REGION_MODE;
+
+	priv->epdc_clk_axi = devm_clk_get(priv->drm.dev, "epdc_axi");
+	if (IS_ERR(priv->epdc_clk_axi))
+		return dev_err_probe(priv->drm.dev, PTR_ERR(priv->epdc_clk_axi),
+				     "Unable to get EPDC AXI clk\n");
+
+	priv->epdc_clk_pix = devm_clk_get(priv->drm.dev, "epdc_pix");
+	if (IS_ERR(priv->epdc_clk_pix))
+		return dev_err_probe(priv->drm.dev, PTR_ERR(priv->epdc_clk_pix),
+				     "Unable to get EPDC pix clk\n");
+
+	clk_prepare_enable(priv->epdc_clk_axi);
+	val = epdc_read(priv, EPDC_VERSION);
+	clk_disable_unprepare(priv->epdc_clk_axi);
+	priv->rev = ((val & EPDC_VERSION_MAJOR_MASK) >>
+				EPDC_VERSION_MAJOR_OFFSET) * 10
+			+ ((val & EPDC_VERSION_MINOR_MASK) >>
+				EPDC_VERSION_MINOR_OFFSET);
+	dev_dbg(priv->drm.dev, "EPDC version = %d\n", priv->rev);
+
+	/* Initialize EPDC pins */
+	pinctrl = devm_pinctrl_get_select_default(priv->drm.dev);
+	if (IS_ERR(pinctrl)) {
+		dev_err(priv->drm.dev, "can't get/select pinctrl\n");
+		return PTR_ERR(pinctrl);
+	}
+
+	mutex_init(&priv->power_mutex);
+
+	return 0;
+}

drivers/gpu/drm/mxc-epdc/epdc_hw.h

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2020 Andreas Kemnade */
+void mxc_epdc_init_sequence(struct mxc_epdc *priv, struct drm_display_mode *m);
+int mxc_epdc_init_hw(struct mxc_epdc *priv);
+
+void mxc_epdc_powerup(struct mxc_epdc *priv);
+void mxc_epdc_powerdown(struct mxc_epdc *priv);
+

drivers/gpu/drm/mxc-epdc/epdc_regs.h

@@ -0,0 +1,442 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2010-2013 Freescale Semiconductor, Inc. */
+
+#ifndef __EPDC_REGS_INCLUDED__
+#define __EPDC_REGS_INCLUDED__
+
+/*************************************
+ * Register addresses
+ **************************************/
+
+#define EPDC_CTRL			0x000
+#define EPDC_CTRL_SET			0x004
+#define EPDC_CTRL_CLEAR			0x008
+#define EPDC_CTRL_TOGGLE		0x00C
+#define EPDC_WB_ADDR_TCE_V3		0x010
+#define EPDC_WVADDR			0x020
+#define EPDC_WB_ADDR			0x030
+#define EPDC_RES			0x040
+#define EPDC_FORMAT			0x050
+#define EPDC_FORMAT_SET			0x054
+#define EPDC_FORMAT_CLEAR		0x058
+#define EPDC_FORMAT_TOGGLE		0x05C
+#define EPDC_WB_FIELD0			0x060
+#define EPDC_WB_FIELD0_SET		0x064
+#define EPDC_WB_FIELD0_CLEAR		0x068
+#define EPDC_WB_FIELD0_TOGGLE		0x06C
+#define EPDC_WB_FIELD1			0x070
+#define EPDC_WB_FIELD1_SET		0x074
+#define EPDC_WB_FIELD1_CLEAR		0x078
+#define EPDC_WB_FIELD1_TOGGLE		0x07C
+#define EPDC_WB_FIELD2			0x080
+#define EPDC_WB_FIELD2_SET		0x084
+#define EPDC_WB_FIELD2_CLEAR		0x088
+#define EPDC_WB_FIELD2_TOGGLE		0x08C
+#define EPDC_WB_FIELD3			0x090
+#define EPDC_WB_FIELD3_SET		0x094
+#define EPDC_WB_FIELD3_CLEAR		0x098
+#define EPDC_WB_FIELD3_TOGGLE		0x09C
+#define EPDC_FIFOCTRL			0x0A0
+#define EPDC_FIFOCTRL_SET		0x0A4
+#define EPDC_FIFOCTRL_CLEAR		0x0A8
+#define EPDC_FIFOCTRL_TOGGLE		0x0AC
+#define EPDC_UPD_ADDR			0x100
+#define EPDC_UPD_STRIDE			0x110
+#define EPDC_UPD_CORD			0x120
+#define EPDC_UPD_SIZE			0x140
+#define EPDC_UPD_CTRL			0x160
+#define EPDC_UPD_FIXED			0x180
+#define EPDC_TEMP			0x1A0
+#define EPDC_AUTOWV_LUT			0x1C0
+#define EPDC_TCE_CTRL			0x200
+#define EPDC_TCE_SDCFG			0x220
+#define EPDC_TCE_GDCFG			0x240
+#define EPDC_TCE_HSCAN1			0x260
+#define EPDC_TCE_HSCAN2			0x280
+#define EPDC_TCE_VSCAN			0x2A0
+#define EPDC_TCE_OE			0x2C0
+#define EPDC_TCE_POLARITY		0x2E0
+#define EPDC_TCE_TIMING1		0x300
+#define EPDC_TCE_TIMING2		0x310
+#define EPDC_TCE_TIMING3		0x320
+#define EPDC_PIGEON_CTRL0		0x380
+#define EPDC_PIGEON_CTRL1		0x390
+#define EPDC_IRQ_MASK1			0x3C0
+#define EPDC_IRQ_MASK1_SET		0x3C4
+#define EPDC_IRQ_MASK1_CLEAR		0x3C8
+#define EPDC_IRQ_MASK1_TOGGLE		0x3CC
+#define EPDC_IRQ_MASK2			0x3D0
+#define EPDC_IRQ_MASK2_SET		0x3D4
+#define EPDC_IRQ_MASK2_CLEAR		0x3D8
+#define EPDC_IRQ_MASK2_TOGGLE		0x3DC
+#define EPDC_IRQ1			0x3E0
+#define EPDC_IRQ1_SET			0x3E4
+#define EPDC_IRQ1_CLEAR			0x3E8
+#define EPDC_IRQ1_TOGGLE		0x3EC
+#define EPDC_IRQ2			0x3F0
+#define EPDC_IRQ2_SET			0x3F4
+#define EPDC_IRQ2_CLEAR			0x3F8
+#define EPDC_IRQ2_TOGGLE		0x3FC
+#define EPDC_IRQ_MASK			0x400
+#define EPDC_IRQ_MASK_SET		0x404
+#define EPDC_IRQ_MASK_CLEAR		0x408
+#define EPDC_IRQ_MASK_TOGGLE		0x40C
+#define EPDC_IRQ			0x420
+#define EPDC_IRQ_SET			0x424
+#define EPDC_IRQ_CLEAR			0x428
+#define EPDC_IRQ_TOGGLE			0x42C
+#define EPDC_STATUS_LUTS		0x440
+#define EPDC_STATUS_LUTS_SET		0x444
+#define EPDC_STATUS_LUTS_CLEAR		0x448
+#define EPDC_STATUS_LUTS_TOGGLE		0x44C
+#define EPDC_STATUS_LUTS2		0x450
+#define EPDC_STATUS_LUTS2_SET		0x454
+#define EPDC_STATUS_LUTS2_CLEAR		0x458
+#define EPDC_STATUS_LUTS2_TOGGLE	0x45C
+#define EPDC_STATUS_NEXTLUT		0x460
+#define EPDC_STATUS_COL			0x480
+#define EPDC_STATUS_COL2		0x490
+#define EPDC_STATUS			0x4A0
+#define EPDC_STATUS_SET			0x4A4
+#define EPDC_STATUS_CLEAR		0x4A8
+#define EPDC_STATUS_TOGGLE		0x4AC
+#define EPDC_UPD_COL_CORD		0x4C0
+#define EPDC_UPD_COL_SIZE		0x4E0
+#define EPDC_DEBUG			0x500
+#define EPDC_DEBUG_LUT			0x530
+#define EPDC_HIST1_PARAM		0x600
+#define EPDC_HIST2_PARAM		0x610
+#define EPDC_HIST4_PARAM		0x620
+#define EPDC_HIST8_PARAM0		0x630
+#define EPDC_HIST8_PARAM1		0x640
+#define EPDC_HIST16_PARAM0		0x650
+#define EPDC_HIST16_PARAM1		0x660
+#define EPDC_HIST16_PARAM2		0x670
+#define EPDC_HIST16_PARAM3		0x680
+#define EPDC_GPIO			0x700
+#define EPDC_VERSION			0x7F0
+#define EPDC_PIGEON_0_0			0x800
+#define EPDC_PIGEON_0_1			0x810
+#define EPDC_PIGEON_0_2			0x820
+#define EPDC_PIGEON_1_0			0x840
+#define EPDC_PIGEON_1_1			0x850
+#define EPDC_PIGEON_1_2			0x860
+#define EPDC_PIGEON_2_0			0x880
+#define EPDC_PIGEON_2_1			0x890
+#define EPDC_PIGEON_2_2			0x8A0
+#define EPDC_PIGEON_3_0			0x8C0
+#define EPDC_PIGEON_3_1			0x8D0
+#define EPDC_PIGEON_3_2			0x8E0
+#define EPDC_PIGEON_4_0			0x900
+#define EPDC_PIGEON_4_1			0x910
+#define EPDC_PIGEON_4_2			0x920
+#define EPDC_PIGEON_5_0			0x940
+#define EPDC_PIGEON_5_1			0x950
+#define EPDC_PIGEON_5_2			0x960
+#define EPDC_PIGEON_6_0			0x980
+#define EPDC_PIGEON_6_1			0x990
+#define EPDC_PIGEON_6_2			0x9A0
+#define EPDC_PIGEON_7_0			0x9C0
+#define EPDC_PIGEON_7_1			0x9D0
+#define EPDC_PIGEON_7_2			0x9E0
+#define EPDC_PIGEON_8_0			0xA00
+#define EPDC_PIGEON_8_1			0xA10
+#define EPDC_PIGEON_8_2			0xA20
+#define EPDC_PIGEON_9_0			0xA40
+#define EPDC_PIGEON_9_1			0xA50
+#define EPDC_PIGEON_9_2			0xA60
+#define EPDC_PIGEON_10_0		0xA80
+#define EPDC_PIGEON_10_1		0xA90
+#define EPDC_PIGEON_10_2		0xAA0
+#define EPDC_PIGEON_11_0		0xAC0
+#define EPDC_PIGEON_11_1		0xAD0
+#define EPDC_PIGEON_11_2		0xAE0
+#define EPDC_PIGEON_12_0		0xB00
+#define EPDC_PIGEON_12_1		0xB10
+#define EPDC_PIGEON_12_2		0xB20
+#define EPDC_PIGEON_13_0		0xB40
+#define EPDC_PIGEON_13_1		0xB50
+#define EPDC_PIGEON_13_2		0xB60
+#define EPDC_PIGEON_14_0		0xB80
+#define EPDC_PIGEON_14_1		0xB90
+#define EPDC_PIGEON_14_2		0xBA0
+#define EPDC_PIGEON_15_0		0xBC0
+#define EPDC_PIGEON_15_1		0xBD0
+#define EPDC_PIGEON_15_2		0xBE0
+#define EPDC_WB_ADDR_TCE		0xC10
+
+/*
+ * Register field definitions
+ */
+
+enum {
+/* EPDC_CTRL field values */
+	EPDC_CTRL_SFTRST = 0x80000000,
+	EPDC_CTRL_CLKGATE = 0x40000000,
+	EPDC_CTRL_SRAM_POWERDOWN = 0x100,
+	EPDC_CTRL_UPD_DATA_SWIZZLE_MASK = 0xC0,
+	EPDC_CTRL_UPD_DATA_SWIZZLE_NO_SWAP = 0,
+	EPDC_CTRL_UPD_DATA_SWIZZLE_ALL_BYTES_SWAP = 0x40,
+	EPDC_CTRL_UPD_DATA_SWIZZLE_HWD_SWAP = 0x80,
+	EPDC_CTRL_UPD_DATA_SWIZZLE_HWD_BYTE_SWAP = 0xC0,
+	EPDC_CTRL_LUT_DATA_SWIZZLE_MASK = 0x30,
+	EPDC_CTRL_LUT_DATA_SWIZZLE_NO_SWAP = 0,
+	EPDC_CTRL_LUT_DATA_SWIZZLE_ALL_BYTES_SWAP = 0x10,
+	EPDC_CTRL_LUT_DATA_SWIZZLE_HWD_SWAP = 0x20,
+	EPDC_CTRL_LUT_DATA_SWIZZLE_HWD_BYTE_SWAP = 0x30,
+	EPDC_CTRL_BURST_LEN_8_8 = 0x1,
+	EPDC_CTRL_BURST_LEN_8_16 = 0,
+
+/* EPDC_RES field values */
+	EPDC_RES_VERTICAL_MASK = 0x1FFF0000,
+	EPDC_RES_VERTICAL_OFFSET = 16,
+	EPDC_RES_HORIZONTAL_MASK = 0x1FFF,
+	EPDC_RES_HORIZONTAL_OFFSET = 0,
+
+/* EPDC_FORMAT field values */
+	EPDC_FORMAT_BUF_PIXEL_SCALE_ROUND = 0x1000000,
+	EPDC_FORMAT_DEFAULT_TFT_PIXEL_MASK = 0xFF0000,
+	EPDC_FORMAT_DEFAULT_TFT_PIXEL_OFFSET = 16,
+	EPDC_FORMAT_BUF_PIXEL_FORMAT_MASK = 0x700,
+	EPDC_FORMAT_BUF_PIXEL_FORMAT_P2N = 0x200,
+	EPDC_FORMAT_BUF_PIXEL_FORMAT_P3N = 0x300,
+	EPDC_FORMAT_BUF_PIXEL_FORMAT_P4N = 0x400,
+	EPDC_FORMAT_BUF_PIXEL_FORMAT_P5N = 0x500,
+	EPDC_FORMAT_TFT_PIXEL_FORMAT_2BIT = 0x0,
+	EPDC_FORMAT_TFT_PIXEL_FORMAT_2BIT_VCOM = 0x1,
+	EPDC_FORMAT_TFT_PIXEL_FORMAT_4BIT = 0x2,
+	EPDC_FORMAT_TFT_PIXEL_FORMAT_4BIT_VCOM = 0x3,
+
+/* EPDC_FIFOCTRL field values */
+	EPDC_FIFOCTRL_ENABLE_PRIORITY = 0x80000000,
+	EPDC_FIFOCTRL_FIFO_INIT_LEVEL_MASK = 0xFF0000,
+	EPDC_FIFOCTRL_FIFO_INIT_LEVEL_OFFSET = 16,
+	EPDC_FIFOCTRL_FIFO_H_LEVEL_MASK = 0xFF00,
+	EPDC_FIFOCTRL_FIFO_H_LEVEL_OFFSET = 8,
+	EPDC_FIFOCTRL_FIFO_L_LEVEL_MASK = 0xFF,
+	EPDC_FIFOCTRL_FIFO_L_LEVEL_OFFSET = 0,
+
+/* EPDC_UPD_CORD field values */
+	EPDC_UPD_CORD_YCORD_MASK = 0x1FFF0000,
+	EPDC_UPD_CORD_YCORD_OFFSET = 16,
+	EPDC_UPD_CORD_XCORD_MASK = 0x1FFF,
+	EPDC_UPD_CORD_XCORD_OFFSET = 0,
+
+/* EPDC_UPD_SIZE field values */
+	EPDC_UPD_SIZE_HEIGHT_MASK = 0x1FFF0000,
+	EPDC_UPD_SIZE_HEIGHT_OFFSET = 16,
+	EPDC_UPD_SIZE_WIDTH_MASK = 0x1FFF,
+	EPDC_UPD_SIZE_WIDTH_OFFSET = 0,
+
+/* EPDC_UPD_CTRL field values */
+	EPDC_UPD_CTRL_USE_FIXED = 0x80000000,
+	EPDC_UPD_CTRL_LUT_SEL_MASK = 0x3F0000,
+	EPDC_UPD_CTRL_LUT_SEL_OFFSET = 16,
+	EPDC_UPD_CTRL_WAVEFORM_MODE_MASK = 0xFF00,
+	EPDC_UPD_CTRL_WAVEFORM_MODE_OFFSET = 8,
+	EPDC_UPD_CTRL_AUTOWV_PAUSE = 0x8,
+	EPDC_UPD_CTRL_AUTOWV = 0x4,
+	EPDC_UPD_CTRL_DRY_RUN = 0x2,
+	EPDC_UPD_CTRL_UPDATE_MODE_FULL = 0x1,
+
+/* EPDC_UPD_FIXED field values */
+	EPDC_UPD_FIXED_FIXNP_EN = 0x80000000,
+	EPDC_UPD_FIXED_FIXCP_EN = 0x40000000,
+	EPDC_UPD_FIXED_FIXNP_MASK = 0xFF00,
+	EPDC_UPD_FIXED_FIXNP_OFFSET = 8,
+	EPDC_UPD_FIXED_FIXCP_MASK = 0xFF,
+	EPDC_UPD_FIXED_FIXCP_OFFSET = 0,
+
+/* EPDC_AUTOWV_LUT field values */
+	EPDC_AUTOWV_LUT_DATA_MASK = 0xFF0000,
+	EPDC_AUTOWV_LUT_DATA_OFFSET = 16,
+	EPDC_AUTOWV_LUT_ADDR_MASK = 0xFF,
+	EPDC_AUTOWV_LUT_ADDR_OFFSET = 0,
+
+/* EPDC_TCE_CTRL field values */
+	EPDC_TCE_CTRL_VSCAN_HOLDOFF_MASK = 0x1FF0000,
+	EPDC_TCE_CTRL_VSCAN_HOLDOFF_OFFSET = 16,
+	EPDC_TCE_CTRL_VCOM_VAL_MASK = 0xC00,
+	EPDC_TCE_CTRL_VCOM_VAL_OFFSET = 10,
+	EPDC_TCE_CTRL_VCOM_MODE_AUTO = 0x200,
+	EPDC_TCE_CTRL_VCOM_MODE_MANUAL = 0x000,
+	EPDC_TCE_CTRL_DDR_MODE_ENABLE = 0x100,
+	EPDC_TCE_CTRL_LVDS_MODE_CE_ENABLE = 0x80,
+	EPDC_TCE_CTRL_LVDS_MODE_ENABLE = 0x40,
+	EPDC_TCE_CTRL_SCAN_DIR_1_UP = 0x20,
+	EPDC_TCE_CTRL_SCAN_DIR_0_UP = 0x10,
+	EPDC_TCE_CTRL_DUAL_SCAN_ENABLE = 0x8,
+	EPDC_TCE_CTRL_SDDO_WIDTH_16BIT = 0x4,
+	EPDC_TCE_CTRL_PIXELS_PER_SDCLK_2 = 1,
+	EPDC_TCE_CTRL_PIXELS_PER_SDCLK_4 = 2,
+	EPDC_TCE_CTRL_PIXELS_PER_SDCLK_8 = 3,
+
+/* EPDC_TCE_SDCFG field values */
+	EPDC_TCE_SDCFG_SDCLK_HOLD = 0x200000,
+	EPDC_TCE_SDCFG_SDSHR = 0x100000,
+	EPDC_TCE_SDCFG_NUM_CE_MASK = 0xF0000,
+	EPDC_TCE_SDCFG_NUM_CE_OFFSET = 16,
+	EPDC_TCE_SDCFG_SDDO_REFORMAT_STANDARD = 0,
+	EPDC_TCE_SDCFG_SDDO_REFORMAT_FLIP_PIXELS = 0x4000,
+	EPDC_TCE_SDCFG_SDDO_INVERT_ENABLE = 0x2000,
+	EPDC_TCE_SDCFG_PIXELS_PER_CE_MASK = 0x1FFF,
+	EPDC_TCE_SDCFG_PIXELS_PER_CE_OFFSET = 0,
+
+/* EPDC_TCE_GDCFG field values */
+	EPDC_TCE_SDCFG_GDRL = 0x10,
+	EPDC_TCE_SDCFG_GDOE_MODE_DELAYED_GDCLK = 0x2,
+	EPDC_TCE_SDCFG_GDSP_MODE_FRAME_SYNC = 0x1,
+	EPDC_TCE_SDCFG_GDSP_MODE_ONE_LINE = 0x0,
+
+/* EPDC_TCE_HSCAN1 field values */
+	EPDC_TCE_HSCAN1_LINE_SYNC_WIDTH_MASK = 0xFFF0000,
+	EPDC_TCE_HSCAN1_LINE_SYNC_WIDTH_OFFSET = 16,
+	EPDC_TCE_HSCAN1_LINE_SYNC_MASK = 0xFFF,
+	EPDC_TCE_HSCAN1_LINE_SYNC_OFFSET = 0,
+
+/* EPDC_TCE_HSCAN2 field values */
+	EPDC_TCE_HSCAN2_LINE_END_MASK = 0xFFF0000,
+	EPDC_TCE_HSCAN2_LINE_END_OFFSET = 16,
+	EPDC_TCE_HSCAN2_LINE_BEGIN_MASK = 0xFFF,
+	EPDC_TCE_HSCAN2_LINE_BEGIN_OFFSET = 0,
+
+/* EPDC_TCE_VSCAN field values */
+	EPDC_TCE_VSCAN_FRAME_END_MASK = 0xFF0000,
+	EPDC_TCE_VSCAN_FRAME_END_OFFSET = 16,
+	EPDC_TCE_VSCAN_FRAME_BEGIN_MASK = 0xFF00,
+	EPDC_TCE_VSCAN_FRAME_BEGIN_OFFSET = 8,
+	EPDC_TCE_VSCAN_FRAME_SYNC_MASK = 0xFF,
+	EPDC_TCE_VSCAN_FRAME_SYNC_OFFSET = 0,
+
+/* EPDC_TCE_OE field values */
+	EPDC_TCE_OE_SDOED_WIDTH_MASK = 0xFF000000,
+	EPDC_TCE_OE_SDOED_WIDTH_OFFSET = 24,
+	EPDC_TCE_OE_SDOED_DLY_MASK = 0xFF0000,
+	EPDC_TCE_OE_SDOED_DLY_OFFSET = 16,
+	EPDC_TCE_OE_SDOEZ_WIDTH_MASK = 0xFF00,
+	EPDC_TCE_OE_SDOEZ_WIDTH_OFFSET = 8,
+	EPDC_TCE_OE_SDOEZ_DLY_MASK = 0xFF,
+	EPDC_TCE_OE_SDOEZ_DLY_OFFSET = 0,
+
+/* EPDC_TCE_POLARITY field values */
+	EPDC_TCE_POLARITY_GDSP_POL_ACTIVE_HIGH = 0x10,
+	EPDC_TCE_POLARITY_GDOE_POL_ACTIVE_HIGH = 0x8,
+	EPDC_TCE_POLARITY_SDOE_POL_ACTIVE_HIGH = 0x4,
+	EPDC_TCE_POLARITY_SDLE_POL_ACTIVE_HIGH = 0x2,
+	EPDC_TCE_POLARITY_SDCE_POL_ACTIVE_HIGH = 0x1,
+
+/* EPDC_TCE_TIMING1 field values */
+	EPDC_TCE_TIMING1_SDLE_SHIFT_NONE = 0x00,
+	EPDC_TCE_TIMING1_SDLE_SHIFT_1 = 0x10,
+	EPDC_TCE_TIMING1_SDLE_SHIFT_2 = 0x20,
+	EPDC_TCE_TIMING1_SDLE_SHIFT_3 = 0x30,
+	EPDC_TCE_TIMING1_SDCLK_INVERT = 0x8,
+	EPDC_TCE_TIMING1_SDCLK_SHIFT_NONE = 0,
+	EPDC_TCE_TIMING1_SDCLK_SHIFT_1CYCLE = 1,
+	EPDC_TCE_TIMING1_SDCLK_SHIFT_2CYCLES = 2,
+	EPDC_TCE_TIMING1_SDCLK_SHIFT_3CYCLES = 3,
+
+/* EPDC_TCE_TIMING2 field values */
+	EPDC_TCE_TIMING2_GDCLK_HP_MASK = 0xFFFF0000,
+	EPDC_TCE_TIMING2_GDCLK_HP_OFFSET = 16,
+	EPDC_TCE_TIMING2_GDSP_OFFSET_MASK = 0xFFFF,
+	EPDC_TCE_TIMING2_GDSP_OFFSET_OFFSET = 0,
+
+/* EPDC_TCE_TIMING3 field values */
+	EPDC_TCE_TIMING3_GDOE_OFFSET_MASK = 0xFFFF0000,
+	EPDC_TCE_TIMING3_GDOE_OFFSET_OFFSET = 16,
+	EPDC_TCE_TIMING3_GDCLK_OFFSET_MASK = 0xFFFF,
+	EPDC_TCE_TIMING3_GDCLK_OFFSET_OFFSET = 0,
+
+/* EPDC_IRQ_MASK/EPDC_IRQ field values */
+	EPDC_IRQ_WB_CMPLT_IRQ = 0x10000,
+	EPDC_IRQ_LUT_COL_IRQ = 0x20000,
+	EPDC_IRQ_TCE_UNDERRUN_IRQ = 0x40000,
+	EPDC_IRQ_FRAME_END_IRQ = 0x80000,
+	EPDC_IRQ_BUS_ERROR_IRQ = 0x100000,
+	EPDC_IRQ_TCE_IDLE_IRQ = 0x200000,
+	EPDC_IRQ_UPD_DONE_IRQ = 0x400000,
+	EPDC_IRQ_PWR_IRQ = 0x800000,
+
+/* EPDC_STATUS_NEXTLUT field values */
+	EPDC_STATUS_NEXTLUT_NEXT_LUT_VALID = 0x100,
+	EPDC_STATUS_NEXTLUT_NEXT_LUT_MASK = 0x3F,
+	EPDC_STATUS_NEXTLUT_NEXT_LUT_OFFSET = 0,
+
+/* EPDC_STATUS field values */
+	EPDC_STATUS_HISTOGRAM_CP_MASK = 0x1F0000,
+	EPDC_STATUS_HISTOGRAM_CP_OFFSET = 16,
+	EPDC_STATUS_HISTOGRAM_NP_MASK = 0x1F00,
+	EPDC_STATUS_HISTOGRAM_NP_OFFSET = 8,
+	EPDC_STATUS_UPD_VOID = 0x8,
+	EPDC_STATUS_LUTS_UNDERRUN = 0x4,
+	EPDC_STATUS_LUTS_BUSY = 0x2,
+	EPDC_STATUS_WB_BUSY = 0x1,
+
+/* EPDC_UPD_COL_CORD field values */
+	EPDC_UPD_COL_CORD_YCORD_MASK = 0x1FFF0000,
+	EPDC_UPD_COL_CORD_YCORD_OFFSET = 16,
+	EPDC_UPD_COL_CORD_XCORD_MASK = 0x1FFF,
+	EPDC_UPD_COL_CORD_XCORD_OFFSET = 0,
+
+/* EPDC_UPD_COL_SIZE field values */
+	EPDC_UPD_COL_SIZE_HEIGHT_MASK = 0x1FFF0000,
+	EPDC_UPD_COL_SIZE_HEIGHT_OFFSET = 16,
+	EPDC_UPD_COL_SIZE_WIDTH_MASK = 0x1FFF,
+	EPDC_UPD_COL_SIZE_WIDTH_OFFSET = 0,
+
+/* EPDC_DEBUG field values */
+	EPDC_DEBUG_UNDERRUN_RECOVER = 0x2,
+	EPDC_DEBUG_COLLISION_OFF = 0x1,
+
+/* EPDC_HISTx_PARAM field values */
+	EPDC_HIST_PARAM_VALUE0_MASK = 0x1F,
+	EPDC_HIST_PARAM_VALUE0_OFFSET = 0,
+	EPDC_HIST_PARAM_VALUE1_MASK = 0x1F00,
+	EPDC_HIST_PARAM_VALUE1_OFFSET = 8,
+	EPDC_HIST_PARAM_VALUE2_MASK = 0x1F0000,
+	EPDC_HIST_PARAM_VALUE2_OFFSET = 16,
+	EPDC_HIST_PARAM_VALUE3_MASK = 0x1F000000,
+	EPDC_HIST_PARAM_VALUE3_OFFSET = 24,
+	EPDC_HIST_PARAM_VALUE4_MASK = 0x1F,
+	EPDC_HIST_PARAM_VALUE4_OFFSET = 0,
+	EPDC_HIST_PARAM_VALUE5_MASK = 0x1F00,
+	EPDC_HIST_PARAM_VALUE5_OFFSET = 8,
+	EPDC_HIST_PARAM_VALUE6_MASK = 0x1F0000,
+	EPDC_HIST_PARAM_VALUE6_OFFSET = 16,
+	EPDC_HIST_PARAM_VALUE7_MASK = 0x1F000000,
+	EPDC_HIST_PARAM_VALUE7_OFFSET = 24,
+	EPDC_HIST_PARAM_VALUE8_MASK = 0x1F,
+	EPDC_HIST_PARAM_VALUE8_OFFSET = 0,
+	EPDC_HIST_PARAM_VALUE9_MASK = 0x1F00,
+	EPDC_HIST_PARAM_VALUE9_OFFSET = 8,
+	EPDC_HIST_PARAM_VALUE10_MASK = 0x1F0000,
+	EPDC_HIST_PARAM_VALUE10_OFFSET = 16,
+	EPDC_HIST_PARAM_VALUE11_MASK = 0x1F000000,
+	EPDC_HIST_PARAM_VALUE11_OFFSET = 24,
+	EPDC_HIST_PARAM_VALUE12_MASK = 0x1F,
+	EPDC_HIST_PARAM_VALUE12_OFFSET = 0,
+	EPDC_HIST_PARAM_VALUE13_MASK = 0x1F00,
+	EPDC_HIST_PARAM_VALUE13_OFFSET = 8,
+	EPDC_HIST_PARAM_VALUE14_MASK = 0x1F0000,
+	EPDC_HIST_PARAM_VALUE14_OFFSET = 16,
+	EPDC_HIST_PARAM_VALUE15_MASK = 0x1F000000,
+	EPDC_HIST_PARAM_VALUE15_OFFSET = 24,
+
+/* EPDC_GPIO field values */
+	EPDC_GPIO_PWRCOM = 0x40,
+	EPDC_GPIO_PWRCTRL_MASK = 0x3C,
+	EPDC_GPIO_PWRCTRL_OFFSET = 2,
+	EPDC_GPIO_BDR_MASK = 0x3,
+	EPDC_GPIO_BDR_OFFSET = 0,
+
+/* EPDC_VERSION field values */
+	EPDC_VERSION_MAJOR_MASK = 0xFF000000,
+	EPDC_VERSION_MAJOR_OFFSET = 24,
+	EPDC_VERSION_MINOR_MASK = 0xFF0000,
+	EPDC_VERSION_MINOR_OFFSET = 16,
+	EPDC_VERSION_STEP_MASK = 0xFFFF,
+	EPDC_VERSION_STEP_OFFSET = 0,
+};
+
+#endif	/* __EPDC_REGS_INCLUDED__ */

drivers/gpu/drm/mxc-epdc/epdc_update.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2020 Andreas Kemnade */
+int mxc_epdc_send_single_update(struct drm_rect *clip, int pitch,
+				void *vaddr,
+                                struct mxc_epdc *priv);
+void mxc_epdc_draw_mode0(struct mxc_epdc *priv);
+int mxc_epdc_init_update(struct mxc_epdc *priv);
+void mxc_epdc_flush_updates(struct mxc_epdc *priv);
+

drivers/gpu/drm/mxc-epdc/epdc_waveform.c

@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (C) 2020 Andreas Kemnade
+//
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include "mxc_epdc.h"
+
+#define DEFAULT_TEMP_INDEX      0
+#define DEFAULT_TEMP            20 /* room temp in deg Celsius */
+
+struct waveform_data_header {
+	unsigned int wi0;
+	unsigned int wi1;
+	unsigned int wi2;
+	unsigned int wi3;
+	unsigned int wi4;
+	unsigned int wi5;
+	unsigned int wi6;
+	unsigned int xwia:24;
+	unsigned int cs1:8;
+	unsigned int wmta:24;
+	unsigned int fvsn:8;
+	unsigned int luts:8;
+	unsigned int mc:8;
+	unsigned int trc:8;
+	unsigned int reserved0_0:8;
+	unsigned int eb:8;
+	unsigned int sb:8;
+	unsigned int reserved0_1:8;
+	unsigned int reserved0_2:8;
+	unsigned int reserved0_3:8;
+	unsigned int reserved0_4:8;
+	unsigned int reserved0_5:8;
+	unsigned int cs2:8;
+};
+
+struct mxcfb_waveform_data_file {
+	struct waveform_data_header wdh;
+	u32 *data;      /* Temperature Range Table + Waveform Data */
+};
+
+void mxc_epdc_set_update_waveform(struct mxc_epdc *priv,
+				  struct mxcfb_waveform_modes *wv_modes)
+{
+	u32 val;
+
+	/* Configure the auto-waveform look-up table based on waveform modes */
+
+	/* Entry 1 = DU, 2 = GC4, 3 = GC8, etc. */
+	val = (wv_modes->mode_du << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+		(0 << EPDC_AUTOWV_LUT_ADDR_OFFSET);
+	epdc_write(priv, EPDC_AUTOWV_LUT, val);
+	val = (wv_modes->mode_du << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+		(1 << EPDC_AUTOWV_LUT_ADDR_OFFSET);
+	epdc_write(priv, EPDC_AUTOWV_LUT, val);
+	val = (wv_modes->mode_gc4 << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+		(2 << EPDC_AUTOWV_LUT_ADDR_OFFSET);
+	epdc_write(priv, EPDC_AUTOWV_LUT, val);
+	val = (wv_modes->mode_gc8 << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+		(3 << EPDC_AUTOWV_LUT_ADDR_OFFSET);
+	epdc_write(priv, EPDC_AUTOWV_LUT, val);
+	val = (wv_modes->mode_gc16 << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+		(4 << EPDC_AUTOWV_LUT_ADDR_OFFSET);
+	epdc_write(priv, EPDC_AUTOWV_LUT, val);
+	val = (wv_modes->mode_gc32 << EPDC_AUTOWV_LUT_DATA_OFFSET) |
+		(5 << EPDC_AUTOWV_LUT_ADDR_OFFSET);
+	epdc_write(priv, EPDC_AUTOWV_LUT, val);
+}
+
+int mxc_epdc_fb_get_temp_index(struct mxc_epdc *priv, int temp)
+{
+	int i;
+	int index = -1;
+
+	if (temp == TEMP_USE_AMBIENT) {
+		if (priv->thermal) {
+			if (thermal_zone_get_temp(priv->thermal, &temp)) {
+				dev_err(priv->drm.dev,
+					"reading temperature failed");
+				return DEFAULT_TEMP_INDEX;
+			}
+			temp /= 1000;
+		} else
+			temp = DEFAULT_TEMP;
+	}
+
+	if (priv->trt_entries == 0) {
+		dev_err(priv->drm.dev,
+			"No TRT exists...using default temp index\n");
+		return DEFAULT_TEMP_INDEX;
+	}
+
+	/* Search temperature ranges for a match */
+	for (i = 0; i < priv->trt_entries - 1; i++) {
+		if ((temp >= priv->temp_range_bounds[i])
+			&& (temp < priv->temp_range_bounds[i+1])) {
+			index = i;
+			break;
+		}
+	}
+
+	if (index < 0) {
+		dev_err(priv->drm.dev,
+			"No TRT index match...using lowest/highest\n");
+		if (temp < priv->temp_range_bounds[0]) {
+			dev_dbg(priv->drm.dev, "temperature < minimum range\n");
+			return 0;
+		}
+
+		if (temp >= priv->temp_range_bounds[priv->trt_entries-1]) {
+			dev_dbg(priv->drm.dev, "temperature >= maximum range\n");
+			return priv->trt_entries-1;
+		}
+
+		return DEFAULT_TEMP_INDEX;
+	}
+
+	dev_dbg(priv->drm.dev, "Using temperature index %d\n", index);
+
+	return index;
+}
+
+
+
+int mxc_epdc_prepare_waveform(struct mxc_epdc *priv,
+			      const u8 *data, size_t size)
+{
+	int ret;
+	const struct mxcfb_waveform_data_file *wv_file;
+	int wv_data_offs;
+	int i;
+
+	priv->wv_modes.mode_init = 0;
+	priv->wv_modes.mode_du = 1;
+	priv->wv_modes.mode_gc4 = 3;
+	priv->wv_modes.mode_gc8 = 2;
+	priv->wv_modes.mode_gc16 = 2;
+	priv->wv_modes.mode_gc32 = 2;
+	priv->wv_modes_update = true;
+
+	wv_file = (struct mxcfb_waveform_data_file *)data;
+
+	/* Get size and allocate temperature range table */
+	priv->trt_entries = wv_file->wdh.trc + 1;
+	priv->temp_range_bounds = devm_kzalloc(priv->drm.dev, priv->trt_entries, GFP_KERNEL);
+
+	for (i = 0; i < priv->trt_entries; i++)
+		dev_dbg(priv->drm.dev, "trt entry #%d = 0x%x\n", i, *((u8 *)&wv_file->data + i));
+
+	/* Copy TRT data */
+	memcpy(priv->temp_range_bounds, &wv_file->data, priv->trt_entries);
+
+	/* Set default temperature index using TRT and room temp */
+	priv->temp_index = mxc_epdc_fb_get_temp_index(priv, DEFAULT_TEMP);
+
+	/* Get offset and size for waveform data */
+	wv_data_offs = sizeof(wv_file->wdh) + priv->trt_entries + 1;
+	priv->waveform_buffer_size = size - wv_data_offs;
+
+	/* Allocate memory for waveform data */
+	priv->waveform_buffer_virt = dmam_alloc_coherent(priv->drm.dev,
+						priv->waveform_buffer_size,
+						&priv->waveform_buffer_phys,
+						GFP_DMA | GFP_KERNEL);
+	if (priv->waveform_buffer_virt == NULL) {
+		dev_err(priv->drm.dev, "Can't allocate mem for waveform!\n");
+		return -ENOMEM;
+	}
+
+	memcpy(priv->waveform_buffer_virt, (u8 *)(data) + wv_data_offs,
+		priv->waveform_buffer_size);
+
+	/* Read field to determine if 4-bit or 5-bit mode */
+	if ((wv_file->wdh.luts & 0xC) == 0x4)
+		priv->buf_pix_fmt = EPDC_FORMAT_BUF_PIXEL_FORMAT_P5N;
+	else
+		priv->buf_pix_fmt = EPDC_FORMAT_BUF_PIXEL_FORMAT_P4N;
+
+	dev_info(priv->drm.dev, "EPDC pix format: %x\n",
+		 priv->buf_pix_fmt);
+
+	return 0;
+}

drivers/gpu/drm/mxc-epdc/epdc_waveform.h

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2020 Andreas Kemnade */
+int mxc_epdc_fb_get_temp_index(struct mxc_epdc *priv, int temp);
+int mxc_epdc_prepare_waveform(struct mxc_epdc *priv,
+			      const u8 *waveform, size_t size);
+void mxc_epdc_set_update_waveform(struct mxc_epdc *priv,
+				  struct mxcfb_waveform_modes *wv_modes);

drivers/gpu/drm/mxc-epdc/mxc_epdc.h

@@ -0,0 +1,153 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2020 Andreas Kemnade */
+
+#include <video/display_timing.h>
+#include <video/of_display_timing.h>
+#include <video/videomode.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <linux/thermal.h>
+#include "epdc_regs.h"
+
+#define GRAYSCALE_8BIT				0x1
+#define GRAYSCALE_8BIT_INVERTED			0x2
+#define GRAYSCALE_4BIT			  0x3
+#define GRAYSCALE_4BIT_INVERTED		 0x4
+
+#define AUTO_UPDATE_MODE_REGION_MODE		0
+#define AUTO_UPDATE_MODE_AUTOMATIC_MODE		1
+
+#define UPDATE_SCHEME_SNAPSHOT			0
+#define UPDATE_SCHEME_QUEUE			1
+#define UPDATE_SCHEME_QUEUE_AND_MERGE		2
+
+#define UPDATE_MODE_PARTIAL			0x0
+#define UPDATE_MODE_FULL			0x1
+
+#define WAVEFORM_MODE_GLR16			4
+#define WAVEFORM_MODE_GLD16			5
+#define WAVEFORM_MODE_AUTO			257
+
+#define TEMP_USE_AMBIENT			0x1000
+
+#define FB_POWERDOWN_DISABLE			-1
+
+struct mxcfb_update_data {
+	struct drm_rect update_region;
+	u32 waveform_mode;
+	u32 update_mode;
+	int temp;
+	int dither_mode;
+	int quant_bit;
+};
+
+struct mxcfb_waveform_modes {
+	int mode_init;
+	int mode_du;
+	int mode_gc4;
+	int mode_gc8;
+	int mode_gc16;
+	int mode_gc32;
+};
+
+struct imx_epdc_fb_mode {
+	u32 vscan_holdoff;
+	u32 sdoed_width;
+	u32 sdoed_delay;
+	u32 sdoez_width;
+	u32 sdoez_delay;
+	u32 gdclk_hp_offs;
+	u32 gdsp_offs;
+	u32 gdoe_offs;
+	u32 gdclk_offs;
+	u32 num_ce;
+};
+
+struct clk;
+struct regulator;
+struct mxc_epdc {
+	struct drm_device drm;
+	struct drm_simple_display_pipe pipe;
+	struct drm_connector connector;
+	struct display_timing timing;
+	struct imx_epdc_fb_mode imx_mode;
+	void __iomem *iobase;
+	struct completion powerdown_compl;
+	struct clk *epdc_clk_axi;
+	struct clk *epdc_clk_pix;
+	struct regulator *display_regulator;
+	struct regulator *vcom_regulator;
+	struct regulator *v3p3_regulator;
+	struct thermal_zone_device *thermal;
+	int rev;
+
+	dma_addr_t epdc_mem_phys;
+	void *epdc_mem_virt;
+	int epdc_mem_width;
+	int epdc_mem_height;
+	u32 *working_buffer_virt;
+	dma_addr_t working_buffer_phys;
+	u32 working_buffer_size;
+
+	/* waveform related stuff */
+	int trt_entries;
+	int temp_index;
+	u8 *temp_range_bounds;
+	int buf_pix_fmt;
+	struct mxcfb_waveform_modes wv_modes;
+	bool wv_modes_update;
+	u32 *waveform_buffer_virt;
+	dma_addr_t waveform_buffer_phys;
+	u32 waveform_buffer_size;
+
+	struct mutex power_mutex;
+	bool powered;
+	bool powering_down;
+	bool updates_active;
+	int wait_for_powerdown;
+	int pwrdown_delay;
+
+	/* elements related to EPDC updates */
+	int num_luts;
+	int max_num_updates;
+#warning take of init of in_init hw_ready, hw_initializing
+	bool in_init;
+	bool hw_ready;
+	bool hw_initializing;
+	bool waiting_for_idle;
+
+	int order_cnt;
+	struct list_head upd_pending_list;
+	struct list_head upd_buf_queue;
+	struct list_head upd_buf_free_list;
+	struct list_head upd_buf_collision_list;
+	struct update_data_list *cur_update;
+	struct mutex queue_mutex;
+	int epdc_irq;
+	struct list_head full_marker_list;
+	u32 *lut_update_order;
+	u64 epdc_colliding_luts;
+	u64 luts_complete_wb;
+	struct completion updates_done;
+	struct delayed_work epdc_done_work;
+	struct workqueue_struct *epdc_submit_workqueue;
+	struct work_struct epdc_submit_work;
+	struct workqueue_struct *epdc_intr_workqueue;
+	struct work_struct epdc_intr_work;
+	bool waiting_for_wb;
+	bool waiting_for_lut;
+	struct completion update_res_free;
+};
+
+static inline u32 epdc_read(struct mxc_epdc *priv, u32 reg)
+{
+	return readl(priv->iobase + reg);
+}
+
+static inline void epdc_write(struct mxc_epdc *priv, u32 reg, u32 data)
+{
+	writel(data, priv->iobase + reg);
+}
+

drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c

@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (C) 2020 Andreas Kemnade
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/fs.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/clients/drm_client_setup.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fbdev_ttm.h>
+#include <drm/drm_file.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include <drm/drm_ioctl.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_probe_helper.h>
+#include "mxc_epdc.h"
+#include "epdc_hw.h"
+#include "epdc_update.h"
+#include "epdc_waveform.h"
+
+#define DRIVER_NAME "mxc_epdc"
+#define DRIVER_DESC "IMX EPDC"
+#define DRIVER_MAJOR 1
+#define DRIVER_MINOR 0
+#define DRIVER_PATCHLEVEL 0
+
+#define to_mxc_epdc(x) container_of(x, struct mxc_epdc, drm)
+
+static const struct drm_mode_config_funcs mxc_epdc_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create_with_dirty,
+	.atomic_check	   = drm_atomic_helper_check,
+	.atomic_commit	  = drm_atomic_helper_commit,
+};
+
+static struct mxc_epdc *
+drm_pipe_to_mxc_epdc(struct drm_simple_display_pipe *pipe)
+{
+	return container_of(pipe, struct mxc_epdc, pipe);
+}
+
+static struct mxc_epdc *
+drm_connector_to_mxc_epdc(struct drm_connector *connector)
+{
+	return container_of(connector, struct mxc_epdc, connector);
+}
+
+static void mxc_epdc_setup_mode_config(struct drm_device *drm)
+{
+	drm_mode_config_init(drm);
+
+	drm->mode_config.min_width = 0;
+	drm->mode_config.min_height = 0;
+	/*
+	 * Maximum update buffer image width due to v2.0 and v2.1 errata
+	 * ERR005313.
+	 */
+	drm->mode_config.max_width = 2047;
+	drm->mode_config.max_height = 2048;
+	drm->mode_config.funcs = &mxc_epdc_mode_config_funcs;
+}
+
+
+DEFINE_DRM_GEM_DMA_FOPS(fops);
+
+static int mxc_epdc_get_modes(struct drm_connector *connector)
+{
+	struct mxc_epdc *priv = drm_connector_to_mxc_epdc(connector);
+	struct drm_display_mode *mode;
+	struct videomode vm;
+
+	videomode_from_timing(&priv->timing, &vm);
+	mode = drm_mode_create(connector->dev);
+	if (!mode) {
+		dev_err(priv->drm.dev, "failed to add mode\n");
+		return 0;
+	}
+
+	drm_display_mode_from_videomode(&vm, mode);
+	mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct
+drm_connector_helper_funcs mxc_epdc_connector_helper_funcs = {
+	.get_modes = mxc_epdc_get_modes,
+};
+
+static const struct drm_connector_funcs mxc_epdc_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy  = drm_connector_cleanup,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+int mxc_epdc_output(struct drm_device *drm)
+{
+	struct mxc_epdc *priv = to_mxc_epdc(drm);
+	int ret;
+
+	priv->connector.dpms = DRM_MODE_DPMS_OFF;
+	priv->connector.polled = 0;
+	drm_connector_helper_add(&priv->connector,
+				 &mxc_epdc_connector_helper_funcs);
+	ret = drm_connector_init(drm, &priv->connector,
+				 &mxc_epdc_connector_funcs,
+				 DRM_MODE_CONNECTOR_Unknown);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "vscan-holdoff",
+				   &priv->imx_mode.vscan_holdoff);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "sdoed-width",
+				   &priv->imx_mode.sdoed_width);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "sdoed-delay",
+				   &priv->imx_mode.sdoed_delay);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "sdoez-width",
+				   &priv->imx_mode.sdoez_width);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "sdoez-delay",
+				   &priv->imx_mode.sdoez_delay);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "gdclk-hp-offs",
+				   &priv->imx_mode.gdclk_hp_offs);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "gdsp-offs",
+				   &priv->imx_mode.gdsp_offs);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "gdoe-offs",
+				   &priv->imx_mode.gdoe_offs);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "gdclk-offs",
+				   &priv->imx_mode.gdclk_offs);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(drm->dev->of_node, "num-ce",
+				   &priv->imx_mode.num_ce);
+	if (ret)
+		return ret;
+
+	ret = of_get_display_timing(drm->dev->of_node, "timing", &priv->timing);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void mxc_epdc_pipe_enable(struct drm_simple_display_pipe *pipe,
+				   struct drm_crtc_state *crtc_state,
+				   struct drm_plane_state *plane_state)
+{
+	struct mxc_epdc *priv = drm_pipe_to_mxc_epdc(pipe);
+	struct drm_display_mode *m = &pipe->crtc.state->adjusted_mode;
+
+	dev_info(priv->drm.dev, "Mode: %d x %d\n", m->hdisplay, m->vdisplay);
+	priv->epdc_mem_width = m->hdisplay;
+	priv->epdc_mem_height = m->vdisplay;
+	priv->epdc_mem_virt = dma_alloc_wc(priv->drm.dev,
+					   m->hdisplay * m->vdisplay,
+					   &priv->epdc_mem_phys, GFP_DMA | GFP_KERNEL);
+	priv->working_buffer_size = m->hdisplay * m->vdisplay * 2;
+	priv->working_buffer_virt =
+		dma_alloc_coherent(priv->drm.dev,
+				   priv->working_buffer_size,
+				   &priv->working_buffer_phys,
+				   GFP_DMA | GFP_KERNEL);
+
+	if (priv->working_buffer_virt && priv->epdc_mem_virt)
+		mxc_epdc_init_sequence(priv, m);
+}
+
+static void mxc_epdc_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct mxc_epdc *priv = drm_pipe_to_mxc_epdc(pipe);
+
+	dev_dbg(priv->drm.dev, "pipe disable\n");
+	mxc_epdc_flush_updates(priv);
+
+	if (priv->epdc_mem_virt) {
+		dma_free_wc(priv->drm.dev, priv->epdc_mem_width * priv->epdc_mem_height,
+			    priv->epdc_mem_virt, priv->epdc_mem_phys);
+		priv->epdc_mem_virt = NULL;
+	}
+
+	if (priv->working_buffer_virt) {
+		dma_free_wc(priv->drm.dev, priv->working_buffer_size,
+			    priv->working_buffer_virt,
+			    priv->working_buffer_phys);
+		priv->working_buffer_virt = NULL;
+	}
+}
+
+static void mxc_epdc_pipe_update(struct drm_simple_display_pipe *pipe,
+				   struct drm_plane_state *old_state)
+{
+	struct mxc_epdc *priv = drm_pipe_to_mxc_epdc(pipe);
+	struct drm_gem_dma_object *gem;
+	struct drm_atomic_helper_damage_iter iter;
+	struct drm_rect clip;
+
+
+	dev_dbg(priv->drm.dev, "pipe update\n");
+	if (!old_state->fb) {
+		dev_dbg(priv->drm.dev, "no fb, nothing to update\n");
+		return;
+	}
+
+	if (priv->epdc_mem_virt == NULL)
+		return;
+
+	gem = drm_fb_dma_get_gem_obj(pipe->plane.state->fb, 0);
+	drm_atomic_helper_damage_iter_init(&iter, old_state, pipe->plane.state);
+	drm_atomic_for_each_plane_damage(&iter, &clip) {
+
+		dev_dbg(priv->drm.dev, "damaged: %d,%d-%d,%d\n",
+			clip.x1, clip.y1, clip.x2, clip.y2);
+
+		mxc_epdc_send_single_update(&clip, old_state->fb->pitches[0],
+					    gem->vaddr, priv);
+	}
+
+	return;
+}
+
+static const struct drm_simple_display_pipe_funcs mxc_epdc_funcs = {
+	.enable	 = mxc_epdc_pipe_enable,
+	.disable = mxc_epdc_pipe_disable,
+	.update	= mxc_epdc_pipe_update,
+};
+
+
+static const uint32_t mxc_epdc_formats[] = {
+	DRM_FORMAT_XRGB8888,
+};
+
+static struct drm_driver mxc_epdc_driver = {
+	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops = &fops,
+	.dumb_create	    = drm_gem_dma_dumb_create,
+	.gem_prime_import_sg_table = drm_gem_dma_prime_import_sg_table,
+	DRM_FBDEV_TTM_DRIVER_OPS,
+
+	.name = DRIVER_NAME,
+	.desc = DRIVER_DESC,
+	.major = DRIVER_MAJOR,
+	.minor = DRIVER_MINOR,
+	.patchlevel = DRIVER_PATCHLEVEL,
+};
+
+
+static int mxc_epdc_probe(struct platform_device *pdev)
+{
+	struct mxc_epdc *priv;
+	const struct firmware *firmware;
+	int ret;
+
+	priv = devm_drm_dev_alloc(&pdev->dev, &mxc_epdc_driver, struct mxc_epdc, drm);
+	if (IS_ERR(priv))
+		return PTR_ERR(priv);
+
+	platform_set_drvdata(pdev, priv);
+
+	ret = mxc_epdc_init_hw(priv);
+	if (ret)
+		return ret;
+
+	ret = mxc_epdc_init_update(priv);
+	if (ret)
+		return ret;
+
+	ret = request_firmware(&firmware, "imx/epdc/epdc.fw", priv->drm.dev);
+	if (ret)
+		return ret;
+
+	ret = mxc_epdc_prepare_waveform(priv, firmware->data, firmware->size);
+	release_firmware(firmware);
+	if (ret)
+		return ret;
+
+	mxc_epdc_setup_mode_config(&priv->drm);
+
+	ret = mxc_epdc_output(&priv->drm);
+	if (ret)
+		return ret;
+
+	drm_simple_display_pipe_init(&priv->drm, &priv->pipe, &mxc_epdc_funcs,
+				     mxc_epdc_formats,
+				     ARRAY_SIZE(mxc_epdc_formats),
+				     NULL,
+				     &priv->connector);
+	drm_plane_enable_fb_damage_clips(&priv->pipe.plane);
+
+	drm_mode_config_reset(&priv->drm);
+
+	ret = drm_dev_register(&priv->drm, 0);
+
+	drm_client_setup(&priv->drm, NULL);
+	return 0;
+}
+
+static void mxc_epdc_remove(struct platform_device *pdev)
+{
+	struct mxc_epdc *priv = platform_get_drvdata(pdev);
+
+	drm_dev_unregister(&priv->drm);
+	drm_kms_helper_poll_fini(&priv->drm);
+	drm_mode_config_cleanup(&priv->drm);
+}
+
+static const struct of_device_id imx_epdc_dt_ids[] = {
+	{ .compatible = "fsl,imx6sl-epdc", },
+	{ .compatible = "fsl,imx6sll-epdc", },
+	{ .compatible = "fsl,imx6ull-epdc", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_epdc_dt_ids);
+
+static struct platform_driver pdev = {
+	.driver = {
+		.name   = "mxc_epdc",
+		.of_match_table = of_match_ptr(imx_epdc_dt_ids),
+	},
+	.probe  = mxc_epdc_probe,
+	.remove = mxc_epdc_remove,
+};
+
+module_platform_driver(pdev);
+MODULE_DESCRIPTION("IMX EPDC driver");
+MODULE_LICENSE("GPL");
+

drivers/input/touchscreen/Kconfig

@@ -267,6 +267,36 @@ config TOUCHSCREEN_CYTTSP_SPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called cyttsp_spi.
 
+config TOUCHSCREEN_CYTTSP4_CORE
+        tristate "Cypress TrueTouch Gen4 Touchscreen Driver"
+        help
+          Core driver for Cypress TrueTouch(tm) Standard Product
+          Generation4 touchscreen controllers.
+
+          Say Y here if you have a Cypress Gen4 touchscreen.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here.
+
+config TOUCHSCREEN_CYTTSP4_I2C
+        tristate "support I2C bus connection"
+        depends on TOUCHSCREEN_CYTTSP4_CORE && I2C
+        help
+          Say Y here if the touchscreen is connected via I2C bus.
+
+          To compile this driver as a module, choose M here: the
+          module will be called cyttsp4_i2c.
+
+config TOUCHSCREEN_CYTTSP4_SPI
+        tristate "support SPI bus connection"
+        depends on TOUCHSCREEN_CYTTSP4_CORE && SPI_MASTER
+        help
+          Say Y here if the touchscreen is connected via SPI bus.
+
+          To compile this driver as a module, choose M here: the
+          module will be called cyttsp4_spi.
+
 config TOUCHSCREEN_CYTTSP5
 	tristate "Cypress TrueTouch Gen5 Touchscreen Driver"
 	depends on I2C

drivers/input/touchscreen/Makefile

@@ -27,6 +27,9 @@ obj-$(CONFIG_TOUCHSCREEN_CY8CTMA140)	+= cy8ctma140.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE)	+= cyttsp_core.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_CORE)  += cyttsp4_core.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_I2C)   += cyttsp4_i2c.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_SPI)   += cyttsp4_spi.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)	+= cyttsp_spi.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP5)	+= cyttsp5.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o

drivers/input/touchscreen/cyttsp4_core.h

@@ -0,0 +1,446 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * cyttsp4_core.h
+ * Cypress TrueTouch(TM) Standard Product V4 Core driver module.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2012 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#ifndef _LINUX_CYTTSP4_CORE_H
+#define _LINUX_CYTTSP4_CORE_H
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/module.h>
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <linux/platform_data/cyttsp4.h>
+#include <linux/of_gpio.h>
+
+#define CY_REG_BASE			0x00
+
+#define CY_POST_CODEL_WDG_RST		0x01
+#define CY_POST_CODEL_CFG_DATA_CRC_FAIL	0x02
+#define CY_POST_CODEL_PANEL_TEST_FAIL	0x04
+
+#define CY_NUM_BTN_PER_REG		4
+
+/* touch record system information offset masks and shifts */
+#define CY_BYTE_OFS_MASK		0x1F
+#define CY_BOFS_MASK			0xE0
+#define CY_BOFS_SHIFT			5
+
+#define CY_TMA1036_TCH_REC_SIZE		6
+#define CY_TMA4XX_TCH_REC_SIZE		9
+#define CY_TMA1036_MAX_TCH		0x0E
+#define CY_TMA4XX_MAX_TCH		0x1E
+
+#define CY_NORMAL_ORIGIN		0	/* upper, left corner */
+#define CY_INVERT_ORIGIN		1	/* lower, right corner */
+
+/* helpers */
+#define GET_NUM_TOUCHES(x)		((x) & 0x1F)
+#define IS_LARGE_AREA(x)		((x) & 0x20)
+#define IS_BAD_PKT(x)			((x) & 0x20)
+#define IS_BOOTLOADER(hst_mode, reset_detect)	\
+		((hst_mode) & 0x01 || (reset_detect) != 0)
+#define IS_TMO(t)			((t) == 0)
+
+
+enum cyttsp_cmd_bits {
+	CY_CMD_COMPLETE = (1 << 6),
+};
+
+/* Timeout in ms. */
+#define CY_WATCHDOG_TIMEOUT		1000
+
+#define CY_MAX_PRINT_SIZE		512
+#ifdef VERBOSE_DEBUG
+#define CY_MAX_PRBUF_SIZE		PIPE_BUF
+#define CY_PR_TRUNCATED			" truncated..."
+#endif
+
+enum cyttsp4_ic_grpnum {
+	CY_IC_GRPNUM_RESERVED,
+	CY_IC_GRPNUM_CMD_REGS,
+	CY_IC_GRPNUM_TCH_REP,
+	CY_IC_GRPNUM_DATA_REC,
+	CY_IC_GRPNUM_TEST_REC,
+	CY_IC_GRPNUM_PCFG_REC,
+	CY_IC_GRPNUM_TCH_PARM_VAL,
+	CY_IC_GRPNUM_TCH_PARM_SIZE,
+	CY_IC_GRPNUM_RESERVED1,
+	CY_IC_GRPNUM_RESERVED2,
+	CY_IC_GRPNUM_OPCFG_REC,
+	CY_IC_GRPNUM_DDATA_REC,
+	CY_IC_GRPNUM_MDATA_REC,
+	CY_IC_GRPNUM_TEST_REGS,
+	CY_IC_GRPNUM_BTN_KEYS,
+	CY_IC_GRPNUM_TTHE_REGS,
+	CY_IC_GRPNUM_NUM
+};
+
+enum cyttsp4_int_state {
+	CY_INT_NONE,
+	CY_INT_IGNORE      = (1 << 0),
+	CY_INT_MODE_CHANGE = (1 << 1),
+	CY_INT_EXEC_CMD    = (1 << 2),
+	CY_INT_AWAKE       = (1 << 3),
+};
+
+enum cyttsp4_mode {
+	CY_MODE_UNKNOWN,
+	CY_MODE_BOOTLOADER   = (1 << 1),
+	CY_MODE_OPERATIONAL  = (1 << 2),
+	CY_MODE_SYSINFO      = (1 << 3),
+	CY_MODE_CAT          = (1 << 4),
+	CY_MODE_STARTUP      = (1 << 5),
+	CY_MODE_LOADER       = (1 << 6),
+	CY_MODE_CHANGE_MODE  = (1 << 7),
+	CY_MODE_CHANGED      = (1 << 8),
+	CY_MODE_CMD_COMPLETE = (1 << 9),
+};
+
+enum cyttsp4_sleep_state {
+	SS_SLEEP_OFF,
+	SS_SLEEP_ON,
+	SS_SLEEPING,
+	SS_WAKING,
+};
+
+enum cyttsp4_startup_state {
+	STARTUP_NONE,
+	STARTUP_QUEUED,
+	STARTUP_RUNNING,
+};
+
+#define CY_NUM_REVCTRL			8
+struct cyttsp4_cydata {
+	u8 ttpidh;
+	u8 ttpidl;
+	u8 fw_ver_major;
+	u8 fw_ver_minor;
+	u8 revctrl[CY_NUM_REVCTRL];
+	u8 blver_major;
+	u8 blver_minor;
+	u8 jtag_si_id3;
+	u8 jtag_si_id2;
+	u8 jtag_si_id1;
+	u8 jtag_si_id0;
+	u8 mfgid_sz;
+	u8 cyito_idh;
+	u8 cyito_idl;
+	u8 cyito_verh;
+	u8 cyito_verl;
+	u8 ttsp_ver_major;
+	u8 ttsp_ver_minor;
+	u8 device_info;
+	u8 mfg_id[];
+} __packed;
+
+struct cyttsp4_test {
+	u8 post_codeh;
+	u8 post_codel;
+} __packed;
+
+struct cyttsp4_pcfg {
+	u8 electrodes_x;
+	u8 electrodes_y;
+	u8 len_xh;
+	u8 len_xl;
+	u8 len_yh;
+	u8 len_yl;
+	u8 res_xh;
+	u8 res_xl;
+	u8 res_yh;
+	u8 res_yl;
+	u8 max_zh;
+	u8 max_zl;
+	u8 panel_info0;
+} __packed;
+
+struct cyttsp4_tch_rec_params {
+	u8 loc;
+	u8 size;
+} __packed;
+
+#define CY_NUM_TCH_FIELDS		7
+#define CY_NUM_EXT_TCH_FIELDS		3
+struct cyttsp4_opcfg {
+	u8 cmd_ofs;
+	u8 rep_ofs;
+	u8 rep_szh;
+	u8 rep_szl;
+	u8 num_btns;
+	u8 tt_stat_ofs;
+	u8 obj_cfg0;
+	u8 max_tchs;
+	u8 tch_rec_size;
+	struct cyttsp4_tch_rec_params tch_rec_old[CY_NUM_TCH_FIELDS];
+	u8 btn_rec_size;	/* btn record size (in bytes) */
+	u8 btn_diff_ofs;	/* btn data loc, diff counts  */
+	u8 btn_diff_size;	/* btn size of diff counts (in bits) */
+	struct cyttsp4_tch_rec_params tch_rec_new[CY_NUM_EXT_TCH_FIELDS];
+} __packed;
+
+struct cyttsp4_sysinfo_ptr {
+	struct cyttsp4_cydata *cydata;
+	struct cyttsp4_test *test;
+	struct cyttsp4_pcfg *pcfg;
+	struct cyttsp4_opcfg *opcfg;
+	struct cyttsp4_ddata *ddata;
+	struct cyttsp4_mdata *mdata;
+} __packed;
+
+struct cyttsp4_sysinfo_data {
+	u8 hst_mode;
+	u8 reserved;
+	u8 map_szh;
+	u8 map_szl;
+	u8 cydata_ofsh;
+	u8 cydata_ofsl;
+	u8 test_ofsh;
+	u8 test_ofsl;
+	u8 pcfg_ofsh;
+	u8 pcfg_ofsl;
+	u8 opcfg_ofsh;
+	u8 opcfg_ofsl;
+	u8 ddata_ofsh;
+	u8 ddata_ofsl;
+	u8 mdata_ofsh;
+	u8 mdata_ofsl;
+} __packed;
+
+enum cyttsp4_tch_abs {	/* for ordering within the extracted touch data array */
+	CY_TCH_X,	/* X */
+	CY_TCH_Y,	/* Y */
+	CY_TCH_P,	/* P (Z) */
+	CY_TCH_T,	/* TOUCH ID */
+	CY_TCH_E,	/* EVENT ID */
+	CY_TCH_O,	/* OBJECT ID */
+	CY_TCH_W,	/* SIZE */
+	CY_TCH_MAJ,	/* TOUCH_MAJOR */
+	CY_TCH_MIN,	/* TOUCH_MINOR */
+	CY_TCH_OR,	/* ORIENTATION */
+	CY_TCH_NUM_ABS
+};
+
+struct cyttsp4_touch {
+	int abs[CY_TCH_NUM_ABS];
+};
+
+struct cyttsp4_tch_abs_params {
+	size_t ofs;	/* abs byte offset */
+	size_t size;	/* size in bits */
+	size_t max;	/* max value */
+	size_t bofs;	/* bit offset */
+};
+
+struct cyttsp4_sysinfo_ofs {
+	size_t chip_type;
+	size_t cmd_ofs;
+	size_t rep_ofs;
+	size_t rep_sz;
+	size_t num_btns;
+	size_t num_btn_regs;	/* ceil(num_btns/4) */
+	size_t tt_stat_ofs;
+	size_t tch_rec_size;
+	size_t obj_cfg0;
+	size_t max_tchs;
+	size_t mode_size;
+	size_t data_size;
+	size_t map_sz;
+	size_t max_x;
+	size_t x_origin;	/* left or right corner */
+	size_t max_y;
+	size_t y_origin;	/* upper or lower corner */
+	size_t max_p;
+	size_t cydata_ofs;
+	size_t test_ofs;
+	size_t pcfg_ofs;
+	size_t opcfg_ofs;
+	size_t ddata_ofs;
+	size_t mdata_ofs;
+	size_t cydata_size;
+	size_t test_size;
+	size_t pcfg_size;
+	size_t opcfg_size;
+	size_t ddata_size;
+	size_t mdata_size;
+	size_t btn_keys_size;
+	struct cyttsp4_tch_abs_params tch_abs[CY_TCH_NUM_ABS];
+	size_t btn_rec_size; /* btn record size (in bytes) */
+	size_t btn_diff_ofs;/* btn data loc ,diff counts, (Op-Mode byte ofs) */
+	size_t btn_diff_size;/* btn size of diff counts (in bits) */
+};
+
+enum cyttsp4_btn_state {
+	CY_BTN_RELEASED,
+	CY_BTN_PRESSED,
+	CY_BTN_NUM_STATE
+};
+
+struct cyttsp4_btn {
+	bool enabled;
+	int state;	/* CY_BTN_PRESSED, CY_BTN_RELEASED */
+	int key_code;
+};
+
+struct cyttsp4_sysinfo {
+	bool ready;
+	struct cyttsp4_sysinfo_data si_data;
+	struct cyttsp4_sysinfo_ptr si_ptrs;
+	struct cyttsp4_sysinfo_ofs si_ofs;
+	struct cyttsp4_btn *btn;	/* button states */
+	u8 *btn_rec_data;		/* button diff count data */
+	u8 *xy_mode;			/* operational mode and status regs */
+	u8 *xy_data;			/* operational touch regs */
+};
+
+struct cyttsp4_mt_data {
+	struct cyttsp4_mt_platform_data *pdata;
+	struct cyttsp4_sysinfo *si;
+	struct input_dev *input;
+	struct mutex report_lock;
+	bool is_suspended;
+	char phys[NAME_MAX];
+	int num_prv_tch;
+};
+
+struct cyttsp4 {
+	struct device *dev;
+	struct mutex system_lock;
+	struct mutex adap_lock;
+	enum cyttsp4_mode mode;
+	enum cyttsp4_sleep_state sleep_state;
+	enum cyttsp4_startup_state startup_state;
+	int int_status;
+	wait_queue_head_t wait_q;
+	int irq;
+	struct work_struct startup_work;
+	struct work_struct watchdog_work;
+	struct timer_list watchdog_timer;
+	struct cyttsp4_sysinfo sysinfo;
+	void *exclusive_dev;
+	int exclusive_waits;
+	atomic_t ignore_irq;
+	bool invalid_touch_app;
+	struct cyttsp4_mt_data md;
+	struct cyttsp4_platform_data *pdata;
+	struct cyttsp4_core_platform_data *cpdata;
+	const struct cyttsp4_bus_ops *bus_ops;
+	u8 *xfer_buf;
+#ifdef VERBOSE_DEBUG
+	u8 pr_buf[CY_MAX_PRBUF_SIZE];
+#endif
+};
+
+struct cyttsp4_bus_ops {
+	u16 bustype;
+	int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
+			const void *values);
+	int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
+			void *values);
+};
+
+enum cyttsp4_hst_mode_bits {
+	CY_HST_TOGGLE      = (1 << 7),
+	CY_HST_MODE_CHANGE = (1 << 3),
+	CY_HST_MODE        = (7 << 4),
+	CY_HST_OPERATE     = (0 << 4),
+	CY_HST_SYSINFO     = (1 << 4),
+	CY_HST_CAT         = (2 << 4),
+	CY_HST_LOWPOW      = (1 << 2),
+	CY_HST_SLEEP       = (1 << 1),
+	CY_HST_RESET       = (1 << 0),
+};
+
+/* abs settings */
+#define CY_IGNORE_VALUE			0xFFFF
+
+/* abs signal capabilities offsets in the frameworks array */
+enum cyttsp4_sig_caps {
+	CY_SIGNAL_OST,
+	CY_MIN_OST,
+	CY_MAX_OST,
+	CY_FUZZ_OST,
+	CY_FLAT_OST,
+	CY_NUM_ABS_SET	/* number of signal capability fields */
+};
+
+/* abs axis signal offsets in the framworks array  */
+enum cyttsp4_sig_ost {
+	CY_ABS_X_OST,
+	CY_ABS_Y_OST,
+	CY_ABS_P_OST,
+	CY_ABS_W_OST,
+	CY_ABS_ID_OST,
+	CY_ABS_MAJ_OST,
+	CY_ABS_MIN_OST,
+	CY_ABS_OR_OST,
+	CY_NUM_ABS_OST	/* number of abs signals */
+};
+
+enum cyttsp4_flags {
+	CY_FLAG_NONE = 0x00,
+	CY_FLAG_HOVER = 0x04,
+	CY_FLAG_FLIP = 0x08,
+	CY_FLAG_INV_X = 0x10,
+	CY_FLAG_INV_Y = 0x20,
+	CY_FLAG_VKEYS = 0x40,
+};
+
+enum cyttsp4_object_id {
+	CY_OBJ_STANDARD_FINGER,
+	CY_OBJ_LARGE_OBJECT,
+	CY_OBJ_STYLUS,
+	CY_OBJ_HOVER,
+};
+
+enum cyttsp4_event_id {
+	CY_EV_NO_EVENT,
+	CY_EV_TOUCHDOWN,
+	CY_EV_MOVE,		/* significant displacement (> act dist) */
+	CY_EV_LIFTOFF,		/* record reports last position */
+};
+
+/* x-axis resolution of panel in pixels */
+#define CY_PCFG_RESOLUTION_X_MASK	0x7F
+
+/* y-axis resolution of panel in pixels */
+#define CY_PCFG_RESOLUTION_Y_MASK	0x7F
+
+/* x-axis, 0:origin is on left side of panel, 1: right */
+#define CY_PCFG_ORIGIN_X_MASK		0x80
+
+/* y-axis, 0:origin is on top side of panel, 1: bottom */
+#define CY_PCFG_ORIGIN_Y_MASK		0x80
+
+static inline int cyttsp4_adap_read(struct cyttsp4 *ts, u16 addr, int size,
+		void *buf)
+{
+	return ts->bus_ops->read(ts->dev, ts->xfer_buf, addr, size, buf);
+}
+
+static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u16 addr, int size,
+		const void *buf)
+{
+	return ts->bus_ops->write(ts->dev, ts->xfer_buf, addr, size, buf);
+}
+
+extern struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
+		struct device *dev, u16 irq, size_t xfer_buf_size);
+extern int cyttsp4_remove(struct cyttsp4 *ts);
+
+extern const struct dev_pm_ops cyttsp4_pm_ops;
+
+#endif /* _LINUX_CYTTSP4_CORE_H */

drivers/input/touchscreen/cyttsp4_i2c.c

@@ -0,0 +1,178 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cyttsp_i2c.c
+ * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
+ * For use with Cypress  Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ * Copyright (C) 2013 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#include "cyttsp4_core.h"
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/delay.h>
+
+#define CYTTSP4_I2C_DATA_SIZE	(3 * 256)
+
+static int cyttsp4_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
+                u16 addr, u8 length, void *values)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        int rc;
+
+        xfer_buf[0] = addr;
+        rc = i2c_master_send(client, xfer_buf, 1);
+        if (rc < 0)
+                return rc;
+
+        rc = i2c_master_recv(client, values, length);
+        return rc < 0 ? rc : 0;
+}
+
+static int cyttsp4_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
+                u16 addr, u8 length, const void *values)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+
+        xfer_buf[0] = addr;
+        memcpy(&xfer_buf[1], values, length);
+        return i2c_master_send(client, xfer_buf, length + 1) < 0 ? -EIO : 0;
+}
+
+static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
+        .bustype        = BUS_I2C,
+        .write          = cyttsp4_i2c_write_block_data,
+        .read           = cyttsp4_i2c_read_block_data,
+};
+
+static const int16_t cyttsp4_abs[] = {
+	ABS_MT_POSITION_X, 0, 758, 0, 0,
+	ABS_MT_POSITION_Y, 0, 1024, 0, 0,
+	ABS_MT_PRESSURE, 0, 255, 0, 0,
+	ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0,
+	ABS_MT_TRACKING_ID, 0, 15, 0, 0,
+	CY_IGNORE_VALUE, 0, 255, 0, 0,
+	CY_IGNORE_VALUE, 0, 255, 0, 0,
+	CY_IGNORE_VALUE, -128, 127, 0, 0,
+};
+
+static struct touch_framework cyttsp4_framework = {
+	.abs = cyttsp4_abs,
+	.size = ARRAY_SIZE(cyttsp4_abs),
+	.enable_vkeys = 0,
+};
+
+static int cyttsp4_xres(struct cyttsp4_core_platform_data *pdata,
+		struct device *dev)
+{
+	int rst_gpio = pdata->rst_gpio;
+
+	gpio_set_value(rst_gpio, 1);
+	msleep(20);
+	gpio_set_value(rst_gpio, 0);
+	msleep(40);
+	gpio_set_value(rst_gpio, 1);
+	msleep(20);
+	return 0;
+}
+
+static int cyttsp4_i2c_probe(struct i2c_client *client)
+{
+	struct cyttsp4_platform_data *pdata;
+	struct cyttsp4_core_platform_data *core_pdata;
+	struct cyttsp4_mt_platform_data *mt_pdata;
+	struct gpio_desc *irq_desc, *rst_desc;
+	struct cyttsp4 *ts;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev, "I2C functionality not Supported\n");
+		return -EIO;
+	}
+
+	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+	core_pdata = devm_kzalloc(&client->dev, sizeof(*core_pdata), GFP_KERNEL);
+	mt_pdata = devm_kzalloc(&client->dev, sizeof(*mt_pdata), GFP_KERNEL);
+	if (!pdata || !core_pdata || !mt_pdata)
+		return -ENOMEM;
+
+	irq_desc = devm_gpiod_get(&client->dev, "irq", GPIOD_IN);
+	if (IS_ERR(irq_desc))
+		return PTR_ERR(irq_desc);
+
+	rst_desc = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(rst_desc))
+		return PTR_ERR(rst_desc);
+
+	core_pdata->irq_gpio = desc_to_gpio(irq_desc);
+	core_pdata->rst_gpio = desc_to_gpio(rst_desc);
+	mt_pdata->inp_dev_name = CYTTSP4_MT_NAME;
+
+
+	mt_pdata->frmwrk = &cyttsp4_framework;
+
+	pdata->core_pdata = core_pdata;
+	pdata->mt_pdata = mt_pdata;
+	client->dev.platform_data = pdata;
+
+	/* Reset the touch controller */
+	gpiod_set_value(rst_desc, 1);
+	msleep(20);
+	gpiod_set_value(rst_desc, 0);
+	msleep(40);
+	gpiod_set_value(rst_desc, 1);
+	msleep(20);
+
+	core_pdata->xres = cyttsp4_xres;
+
+	ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
+			  CYTTSP4_I2C_DATA_SIZE);
+
+	return PTR_ERR_OR_ZERO(ts);
+}
+
+static void cyttsp4_i2c_remove(struct i2c_client *client)
+{
+	struct cyttsp4 *ts = i2c_get_clientdata(client);
+
+	cyttsp4_remove(ts);
+}
+
+#define CYTTSP4_I2C_NAME "cyttsp4_i2c_adapter"
+
+static const struct i2c_device_id cyttsp4_i2c_id[] = {
+	{ CYTTSP4_I2C_NAME, 0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
+
+static const struct of_device_id cyttsp4_of_match[] = {
+	{ .compatible = "cypress,cyttsp4-i2c", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cyttsp4_of_match);
+
+static struct i2c_driver cyttsp4_i2c_driver = {
+	.driver = {
+		.name		= CYTTSP4_I2C_NAME,
+		.of_match_table	= cyttsp4_of_match,
+		.pm		= &cyttsp4_pm_ops,
+	},
+	.probe		= cyttsp4_i2c_probe,
+	.remove		= cyttsp4_i2c_remove,
+	.id_table	= cyttsp4_i2c_id,
+};
+
+module_i2c_driver(cyttsp4_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
+MODULE_AUTHOR("Cypress");

drivers/input/touchscreen/cyttsp4_spi.c

@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Source for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) SPI touchscreen driver.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ * Copyright (C) 2013 Cypress Semiconductor
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ */
+
+#include "cyttsp4_core.h"
+
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/spi/spi.h>
+
+#define CY_SPI_WR_OP		0x00 /* r/~w */
+#define CY_SPI_RD_OP		0x01
+#define CY_SPI_BITS_PER_WORD	8
+#define CY_SPI_A8_BIT		0x02
+#define CY_SPI_WR_HEADER_BYTES	2
+#define CY_SPI_RD_HEADER_BYTES	1
+#define CY_SPI_CMD_BYTES	2
+#define CY_SPI_SYNC_BYTE	0
+#define CY_SPI_SYNC_ACK		0x62 /* from TRM *A protocol */
+#define CY_SPI_DATA_SIZE	(2 * 256)
+
+#define CY_SPI_DATA_BUF_SIZE	(CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE)
+
+static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
+			   u8 op, u16 reg, u8 *buf, int length)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	struct spi_message msg;
+	struct spi_transfer xfer[2];
+	u8 *wr_buf = &xfer_buf[0];
+	u8 rd_buf[CY_SPI_CMD_BYTES];
+	int retval;
+	int i;
+
+	if (length > CY_SPI_DATA_SIZE) {
+		dev_err(dev, "%s: length %d is too big.\n",
+			__func__, length);
+		return -EINVAL;
+	}
+
+	memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE);
+	memset(rd_buf, 0, CY_SPI_CMD_BYTES);
+
+	wr_buf[0] = op + (((reg >> 8) & 0x1) ? CY_SPI_A8_BIT : 0);
+	if (op == CY_SPI_WR_OP) {
+		wr_buf[1] = reg & 0xFF;
+		if (length > 0)
+			memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length);
+	}
+
+	memset(xfer, 0, sizeof(xfer));
+	spi_message_init(&msg);
+
+	/*
+	  We set both TX and RX buffers because Cypress TTSP
+	  requires full duplex operation.
+	*/
+	xfer[0].tx_buf = wr_buf;
+	xfer[0].rx_buf = rd_buf;
+	switch (op) {
+	case CY_SPI_WR_OP:
+		xfer[0].len = length + CY_SPI_CMD_BYTES;
+		spi_message_add_tail(&xfer[0], &msg);
+		break;
+
+	case CY_SPI_RD_OP:
+		xfer[0].len = CY_SPI_RD_HEADER_BYTES;
+		spi_message_add_tail(&xfer[0], &msg);
+
+		xfer[1].rx_buf = buf;
+		xfer[1].len = length;
+		spi_message_add_tail(&xfer[1], &msg);
+		break;
+
+	default:
+		dev_err(dev, "%s: bad operation code=%d\n", __func__, op);
+		return -EINVAL;
+	}
+
+	retval = spi_sync(spi, &msg);
+	if (retval < 0) {
+		dev_dbg(dev, "%s: spi_sync() error %d, len=%d, op=%d\n",
+			__func__, retval, xfer[1].len, op);
+
+		/*
+		 * do not return here since was a bad ACK sequence
+		 * let the following ACK check handle any errors and
+		 * allow silent retries
+		 */
+	}
+
+	if (rd_buf[CY_SPI_SYNC_BYTE] != CY_SPI_SYNC_ACK) {
+		dev_dbg(dev, "%s: operation %d failed\n", __func__, op);
+
+		for (i = 0; i < CY_SPI_CMD_BYTES; i++)
+			dev_dbg(dev, "%s: test rd_buf[%d]:0x%02x\n",
+				__func__, i, rd_buf[i]);
+		for (i = 0; i < length; i++)
+			dev_dbg(dev, "%s: test buf[%d]:0x%02x\n",
+				__func__, i, buf[i]);
+
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf,
+				      u16 addr, u8 length, void *data)
+{
+	int rc;
+
+	rc = cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, NULL, 0);
+	if (rc)
+		return rc;
+	else
+		return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_RD_OP, addr, data,
+				length);
+}
+
+static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf,
+				       u16 addr, u8 length, const void *data)
+{
+	return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data,
+			length);
+}
+
+static const struct cyttsp4_bus_ops cyttsp_spi_bus_ops = {
+	.bustype	= BUS_SPI,
+	.write		= cyttsp_spi_write_block_data,
+	.read		= cyttsp_spi_read_block_data,
+};
+
+static int cyttsp4_spi_probe(struct spi_device *spi)
+{
+	struct cyttsp4 *ts;
+	int error;
+
+	/* Set up SPI*/
+	spi->bits_per_word = CY_SPI_BITS_PER_WORD;
+	spi->mode = SPI_MODE_0;
+	error = spi_setup(spi);
+	if (error < 0) {
+		dev_err(&spi->dev, "%s: SPI setup error %d\n",
+			__func__, error);
+		return error;
+	}
+
+	ts = cyttsp4_probe(&cyttsp_spi_bus_ops, &spi->dev, spi->irq,
+			  CY_SPI_DATA_BUF_SIZE);
+
+	return PTR_ERR_OR_ZERO(ts);
+}
+
+static void cyttsp4_spi_remove(struct spi_device *spi)
+{
+	struct cyttsp4 *ts = spi_get_drvdata(spi);
+	cyttsp4_remove(ts);
+}
+
+static struct spi_driver cyttsp4_spi_driver = {
+	.driver = {
+		.name	= CYTTSP4_SPI_NAME,
+		.pm	= &cyttsp4_pm_ops,
+	},
+	.probe  = cyttsp4_spi_probe,
+	.remove = cyttsp4_spi_remove,
+};
+
+module_spi_driver(cyttsp4_spi_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) SPI driver");
+MODULE_AUTHOR("Cypress");
+MODULE_ALIAS("spi:cyttsp4");

drivers/mfd/Kconfig

@@ -916,6 +916,20 @@ config MFD_MAX77693
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_MAX77696
+        tristate "Maxim MAX77696 PMIC Support"
+        depends on I2C
+        depends on OF
+        select MFD_CORE
+        select REGMAP_I2C
+        help
+          Say Y here to add support for Maxim Semiconductor MAX77696
+          Power Management ICs. This is the core multifunction
+          driver for interacting with the device. The module name is
+          'max77696'. Additional drivers can be enabled in order to use
+          the following functionalities of the device: GPIO, regulator,
+          charger, LED.
+
 config MFD_MAX77705
 	tristate "Maxim MAX77705 PMIC Support"
 	depends on I2C

drivers/mfd/Makefile

@@ -167,6 +167,7 @@ obj-$(CONFIG_MFD_MAX77620)	+= max77620.o
 obj-$(CONFIG_MFD_MAX77650)	+= max77650.o
 obj-$(CONFIG_MFD_MAX77686)	+= max77686.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o
+obj-$(CONFIG_MFD_MAX77696)	+= max77696.o
 obj-$(CONFIG_MFD_MAX77705)	+= max77705.o
 obj-$(CONFIG_MFD_MAX77714)	+= max77714.o
 obj-$(CONFIG_MFD_MAX77843)	+= max77843.o

drivers/mfd/max77696.c

@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2026 smallsoalr
+// Author: smallsolar <solarcene@protonmail.com>
+//
+// Core MFD driver for MAXIM 77696 power-supply.
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77696.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+static const struct mfd_cell max77696_cells[] = {
+	{
+		.name		= "max77696-regulator",
+		.of_compatible	= "maxim,max77696-regulator",
+	}, {
+		.name		= "max77696-epd",
+		.of_compatible	= "maxim,max77696-epd",
+	}, {
+		.name		= "max77696-wled",
+		.of_compatible	= "maxim,max77696-wled",
+	},
+};
+
+static const struct regmap_config max77696_regmap_config = {
+	.name		= "max77696",
+	.reg_bits	= 8,
+	.val_bits	= 8,
+};
+
+static int max77696_i2c_probe(struct i2c_client *client)
+{
+	struct max77696 *chip;
+	unsigned int val;
+	int rv;
+
+	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->dev = &client->dev;
+    	i2c_set_clientdata(client, chip);
+
+	chip->regmap = devm_regmap_init_i2c(client, &max77696_regmap_config);
+	if (IS_ERR(chip->regmap)) {
+		dev_err(chip->dev, "Unable to initialise I2C Regmap\n");
+		return PTR_ERR(chip->regmap);
+	}
+
+	rv = regmap_read(chip->regmap, MAX77696_REG_CID, &val);
+	if (rv) {
+		dev_err(chip->dev, "Unable to read Chip ID\n");
+		return rv;
+	}
+
+	dev_info(chip->dev, "Chip Detected ID: 0x%02x\n", val);
+
+	return devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
+				    max77696_cells, ARRAY_SIZE(max77696_cells),
+				    NULL, 0, NULL);
+}
+
+static const struct of_device_id max77696_of_match[] = {
+	{ .compatible = "maxim,max77696" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max77696_of_match);
+
+static struct i2c_driver max77696_i2c_driver = {
+	.driver = {
+		.name = "max77696",
+		.of_match_table = max77696_of_match,
+	},
+	.probe = max77696_i2c_probe,
+};
+module_i2c_driver(max77696_i2c_driver);
+
+MODULE_DESCRIPTION("MAXIM 77696 multi-function core driver");
+MODULE_AUTHOR("smallsolar <solarcene@protonmail.com>");
+MODULE_LICENSE("GPL v2");

drivers/regulator/Kconfig

@@ -747,6 +747,12 @@ config REGULATOR_MAX77693
 	  and one current regulator 'CHARGER'. This is suitable for
 	  Exynos-4x12 (MAX77693) or Exynos5433 (MAX77843) SoC chips.
 
+config REGULATOR_MAX77696
+        tristate "Maxim 77696 regulator"
+        depends on MFD_MAX77696 || COMPILE_TEST
+        help
+          This driver controls a Maxim 77693/77843 regulators via I2C bus.
+
 config REGULATOR_MAX77802
 	tristate "Maxim 77802 regulator"
 	depends on MFD_MAX77686 || COMPILE_TEST

drivers/regulator/Makefile

@@ -89,6 +89,7 @@ obj-$(CONFIG_REGULATOR_MAX20086) += max20086-regulator.o
 obj-$(CONFIG_REGULATOR_MAX20411) += max20411-regulator.o
 obj-$(CONFIG_REGULATOR_MAX77686) += max77686-regulator.o
 obj-$(CONFIG_REGULATOR_MAX77693) += max77693-regulator.o
+obj-$(CONFIG_REGULATOR_MAX77696) += max77696-epd.o
 obj-$(CONFIG_REGULATOR_MAX77802) += max77802-regulator.o
 obj-$(CONFIG_REGULATOR_MAX77826) += max77826-regulator.o
 obj-$(CONFIG_REGULATOR_MAX77857) += max77857-regulator.o

drivers/regulator/max77696-epd.c

@@ -0,0 +1,236 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MAX77696 EPD (E-Paper Display) power supply driver
+ *
+ * Drives the EPD regulator block of the MAX77696 PMIC.
+ * Registers DISPLAY, VCOM and V3P3 regulators needed by
+ * the i.MX6SL EPDC driver.
+ *
+ * Copyright (C) 2026 smallsolar <solarcene@protonmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/mfd/max77696.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+
+enum {
+	MAX77696_EPD_DISPLAY,
+	MAX77696_EPD_VCOM,
+	MAX77696_EPD_V3P3,
+	MAX77696_EPD_NUM_REGS,
+};
+
+/*
+ * max77696_epd_vcom_enable - enable VCOM with fault detection and retry.
+ *
+ * EPDINT (0x62) is read-to-clear: a single read both samples and clears
+ * the fault bit, so no separate clear step is needed.
+ *
+ * Called by the regulator core as the .enable op for VCOM only.
+ * DISPLAY and V3P3 use the generic regmap enable op.
+ */
+static int max77696_vcom_enable(struct regulator_dev *rdev)
+{
+
+	struct max77696 *chip = rdev_get_drvdata(rdev);
+	struct regmap *regmap = chip->regmap;
+	struct device *dev = chip->dev;
+
+	unsigned int val;
+	int i, ret;
+
+	for (i = 0; i < MAX77696_EPD_VCOM_FAULT_RETRIES; i++) {
+		/* Enable VCOM via the standard regmap bit */
+		ret = regulator_enable_regmap(rdev);
+		if (ret) {
+			dev_err(dev, "VCOM enable failed (attempt %d): %d\n",
+				i + 1, ret);
+			return ret;
+		}
+
+		msleep(MAX77696_EPD_VCOM_SETTLE_MS);
+
+		/*
+		 * Read EPDINT. This is read-to-clear, so a single read
+		 * both samples and clears the fault status.
+		 */
+		ret = regmap_read(regmap, EPDINT_REG, &val);
+		if (ret) {
+			dev_err(dev, "EPDINT read failed: %d\n", ret);
+			return ret;
+		}
+
+		if (!(val & EPDINT_VCOM_FAULT)) {
+			if (i > 0)
+				dev_info(dev,
+					 "VCOM stable after %d attempt(s)\n",
+					 i + 1);
+			return 0;
+		}
+
+		dev_warn(chip->dev,
+			 "VCOM fault detected (EPDINT=0x%02x), "
+			 "retrying (%d/%d)\n",
+			 val, i + 1, MAX77696_EPD_VCOM_FAULT_RETRIES);
+
+		ret = regulator_disable_regmap(rdev);
+		if (ret) {
+			dev_err(dev, "VCOM disable (for retry) failed: %d\n",
+				ret);
+			return ret;
+		}
+
+		msleep(MAX77696_EPD_VCOM_RETRY_DELAY_MS);
+	}
+
+	dev_err(dev,
+		"VCOM failed to stabilise after %d attempts; "
+		"last EPDINT=0x%02x\n",
+		MAX77696_EPD_VCOM_FAULT_RETRIES, val);
+	return -EIO;
+}
+
+static const struct regulator_ops max77696_regmap_ops = {
+	.enable     = regulator_enable_regmap,
+	.disable    = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+};
+
+static const struct regulator_ops max77696_vcom_ops = {
+	.enable     = max77696_vcom_enable,
+	.disable    = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+};
+
+static const struct regulator_desc max77696_regs[] = {
+	[MAX77696_EPD_DISPLAY] = {
+		.name           = "DISPLAY",
+		.of_match       = "DISPLAY",
+		.regulators_node = "regulators",
+		.id             = MAX77696_EPD_DISPLAY,
+		.ops            = &max77696_regmap_ops,
+		.type           = REGULATOR_VOLTAGE,
+		.owner          = THIS_MODULE,
+		.enable_reg     = EPDCNFG_REG,
+		.enable_mask    = EPDCNFG_EPDEN,
+	},
+	[MAX77696_EPD_VCOM] = {
+		.name           = "VCOM",
+		.of_match       = "VCOM",
+		.regulators_node = "regulators",
+		.id             = MAX77696_EPD_VCOM,
+		.ops            = &max77696_vcom_ops,  /* fault-aware enable */
+		.type           = REGULATOR_VOLTAGE,
+		.owner          = THIS_MODULE,
+		.enable_reg     = EPDCNFG_REG,
+		.enable_mask    = EPDCNFG_VCOMEN,
+	},
+	[MAX77696_EPD_V3P3] = {
+		.name           = "V3P3",
+		.of_match       = "V3P3",
+		.regulators_node = "regulators",
+		.id             = MAX77696_EPD_V3P3,
+		.ops            = &max77696_regmap_ops,
+		.type           = REGULATOR_VOLTAGE,
+		.owner          = THIS_MODULE,
+		.enable_reg     = EPDCNFG_REG,
+		.enable_mask    = EPDCNFG_SSHVDDH,
+	},
+};
+
+static int max77696_regulator_probe(struct platform_device *pdev)
+{
+
+	struct max77696 *chip = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+
+	unsigned int vcom_val, vcomr_val, lsw4;
+
+	int i, ret;
+
+	config.dev = &pdev->dev;
+	config.regmap = chip->regmap;
+	config.driver_data = chip;
+
+
+	dev_info(&pdev->dev, "of_node = %pOF\n", pdev->dev.of_node);
+
+	for (i = 0; i < ARRAY_SIZE(max77696_regs); i++) {
+		rdev = devm_regulator_register(&pdev->dev, &max77696_regs[i], &config);
+
+		if (IS_ERR(rdev))
+			return dev_err_probe(chip->dev, PTR_ERR(rdev),
+					     "register %s failed\n",
+					     max77696_regs[i].name);
+	}
+
+	/*
+	 * Set VCOM to its factory-calibrated voltage. Written unconditionally
+	 * at probe, independent of enable state, matching the vendor driver's
+	 * behaviour of voltage being a separate concern from enable/disable.
+	 */
+	ret = regmap_update_bits(chip->regmap, EPDVCOMR_REG, EPDVCOMR_VCOMR, EPDVCOMR_VCOMR);
+	if (ret)
+		return dev_err_probe(chip->dev, ret, "failed to set VCOMR\n");
+
+	ret = regmap_write(chip->regmap, EPDVCOM_REG, VCOM_CAL_REG_VALUE);
+	if (ret)
+		return dev_err_probe(chip->dev, ret, "failed to set VCOM calibration\n");
+
+
+	regmap_read(chip->regmap, EPDVCOM_REG, &vcom_val);
+	regmap_read(chip->regmap, EPDVCOMR_REG, &vcomr_val);
+	dev_info(chip->dev, "VCOM readback: EPDVCOM=0x%02x EPDVCOMR=0x%02x\n",
+        	vcom_val, vcomr_val & EPDVCOMR_VCOMR);
+
+	/* Enable LSW4 (DISP_GATED) — gates 3.3V to panel logic on Muscat WFO.
+	 * LSW4 = DISP_GATED-old per board-mx6sl_wario.c MAX77696_VREG_CONSUMERS.
+	 */
+	ret = regmap_update_bits(chip->regmap, LSW4_CNTRL_REG, LSW4_OUTLS, LSW4_OUTLS);
+	if (ret)
+	    return dev_err_probe(chip->dev, ret, "failed to enable LSW4 (DISP_GATED)\n");
+
+	/* Verify LSW4 enable latched */
+	regmap_read(chip->regmap, LSW4_CNTRL_REG, &lsw4);
+	dev_info(chip->dev, "LSW4: 0x%02x\n", lsw4);
+
+	dev_info(chip->dev, "MAX77696 v0.8 EPD regulators registered (VCOM=%d uV)\n",
+        	(VCOM_CAL_REG_VALUE + 0xFF) * 9985);
+
+	return 0;
+}
+
+static const struct of_device_id max77696_regulator_of_match[] = {
+	{ .compatible = "maxim,max77696-epd" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max77696_regulator_of_match);
+
+static const struct platform_device_id max77696_regulator_id[] = {
+	{ "max77696-epd", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, max77696_regulator_id);
+
+static struct platform_driver max77696_regulator_driver = {
+	.driver = {
+		.name           = "max77696-epd",
+		.of_match_table = max77696_regulator_of_match,
+	},
+	.probe    = max77696_regulator_probe,
+	.id_table = max77696_regulator_id,
+};
+module_platform_driver(max77696_regulator_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MAX77696 EPD power supply driver");
+MODULE_AUTHOR("smallsolar");

drivers/video/backlight/Kconfig

@@ -262,6 +262,12 @@ config BACKLIGHT_DA9052
 	help
 	  Enable the Backlight Driver for DA9052-BC and DA9053-AA/Bx PMICs.
 
+config BACKLIGHT_MAX77696
+        tristate "Backlight driver for MAX77696"
+	depends on MFD_MAX77696 || COMPILE_TEST
+        help
+          Enable driver for MAX77696 Front WLEDs (Kindle PW3).
+
 config BACKLIGHT_MAX8925
 	tristate "Backlight driver for MAX8925"
 	depends on MFD_MAX8925

drivers/video/backlight/Makefile

@@ -46,6 +46,7 @@ obj-$(CONFIG_BACKLIGHT_LP855X)		+= lp855x_bl.o
 obj-$(CONFIG_BACKLIGHT_LP8788)		+= lp8788_bl.o
 obj-$(CONFIG_BACKLIGHT_LV5207LP)	+= lv5207lp.o
 obj-$(CONFIG_BACKLIGHT_MAX8925)		+= max8925_bl.o
+obj-$(CONFIG_BACKLIGHT_MAX77696)	+= max77696-wled.o
 obj-$(CONFIG_BACKLIGHT_MP3309C)		+= mp3309c.o
 obj-$(CONFIG_BACKLIGHT_MT6370)		+= mt6370-backlight.o
 obj-$(CONFIG_BACKLIGHT_OMAP1)		+= omap1_bl.o

drivers/video/backlight/max77696-wled.c

@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MAX77696 WLED Backlight Driver
+ *
+ * Controls the WLED boost regulator block of the MAX77696 PMIC,
+ * used as the frontlight driver on the Amazon Kindle Paperwhite 3
+ * (Wario/Muscat platform).
+ *
+ * Register map (from vendor kernel):
+ *   0x6C  LEDBST_CNTRL1  — bit 7 = LED1EN (boost + LED enable)
+ *   0x6D  LED1CURRENT_1  — bits 11:4 of 12-bit current DAC (MSB)
+ *   0x6E  LED1CURRENT_2  — bits  3:0 of 12-bit current DAC (LSB)
+ *
+ * Brightness is a 12-bit value (0–4095). The stock driver uses
+ * DUET_FL_LEVEL12_MID = 240 as the default brightness on Muscat WFO.
+ *
+ * Copyright (C) 2026 smallsolar <solarcene@protonmail.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/mfd/max77696.h>
+#include <linux/platform_device.h>
+
+/*
+ * Default brightness on probe: DUET_FL_LEVEL12_MID from vendor
+ * frontlight.h. Matches the stock kernel's initial setting on
+ * Muscat WFO (KPW3). Set to 0 to start with backlight off.
+ */
+#define MAX77696_BL_DEFAULT_BRIGHTNESS  240
+
+struct max77696_bl {
+	struct regmap *regmap;
+	struct device *dev;
+	int brightness;
+};
+
+/*
+ * max77696_bl_set - write brightness to hardware.
+ *
+ * Brightness is a 12-bit value split across two registers:
+ *   LED1CURRENT_1 = bits 11:4 (upper 8 bits)
+ *   LED1CURRENT_2 = bits  3:0 (lower 4 bits)
+ *
+ * At brightness=0, disable the boost converter (LED1EN=0).
+ * At brightness>0, write current registers then enable (LED1EN=1).
+ * This matches the sequence in the vendor max77696_bl_set().
+ */
+static int max77696_bl_set(struct max77696_bl *bl, int brightness)
+{
+	int ret;
+
+	brightness = clamp(brightness,
+			   MAX77696_BL_MIN_BRIGHTNESS,
+			   MAX77696_BL_MAX_BRIGHTNESS);
+
+	if (brightness == MAX77696_BL_MIN_BRIGHTNESS) {
+		/* Disable boost converter */
+		ret = regmap_update_bits(bl->regmap, LEDBST_CNTRL1_REG,
+					 LEDBST_CNTRL1_LED1EN, 0);
+		if (ret)
+			return ret;
+		bl->brightness = 0;
+		return 0;
+	}
+
+	/* Write 12-bit brightness: MSB in LED1CURRENT_1, LSB in LED1CURRENT_2 */
+	ret = regmap_write(bl->regmap, LED1CURRENT_1_REG,
+			   (brightness >> 4) & 0xFF);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(bl->regmap, LED1CURRENT_2_REG,
+			   brightness & 0x0F);
+	if (ret)
+		return ret;
+
+	/* Enable boost converter */
+	ret = regmap_update_bits(bl->regmap, LEDBST_CNTRL1_REG,
+				 LEDBST_CNTRL1_LED1EN, LEDBST_CNTRL1_LED1EN);
+	if (ret)
+		return ret;
+
+	bl->brightness = brightness;
+	return 0;
+}
+
+static int max77696_bl_update_status(struct backlight_device *bd)
+{
+	struct max77696_bl *bl = bl_get_data(bd);
+	int brightness = backlight_get_brightness(bd);
+
+	return max77696_bl_set(bl, brightness);
+}
+
+static int max77696_bl_get_brightness(struct backlight_device *bd)
+{
+	struct max77696_bl *bl = bl_get_data(bd);
+	unsigned int msb, lsb, enabled;
+	int ret;
+
+	ret = regmap_read(bl->regmap, LEDBST_CNTRL1_REG, &enabled);
+	if (ret)
+		return ret;
+
+	if (!(enabled & LEDBST_CNTRL1_LED1EN))
+		return 0;
+
+	ret = regmap_read(bl->regmap, LED1CURRENT_1_REG, &msb);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(bl->regmap, LED1CURRENT_2_REG, &lsb);
+	if (ret)
+		return ret;
+
+	return (msb << 4) | (lsb & 0x0F);
+}
+
+static const struct backlight_ops max77696_bl_ops = {
+	.options        = BL_CORE_SUSPENDRESUME,
+	.update_status  = max77696_bl_update_status,
+	.get_brightness = max77696_bl_get_brightness,
+};
+
+static int max77696_bl_probe(struct platform_device *pdev)
+{
+        struct max77696 *chip = dev_get_drvdata(pdev->dev.parent);
+
+	struct device *dev = &pdev->dev;
+	struct max77696_bl *bl;
+	struct backlight_device *bd;
+	struct backlight_properties props = {
+		.type           = BACKLIGHT_RAW,
+		.max_brightness = MAX77696_BL_MAX_BRIGHTNESS,
+		.brightness     = MAX77696_BL_DEFAULT_BRIGHTNESS,
+	};
+	u32 brightness;
+	int ret;
+
+	bl = devm_kzalloc(dev, sizeof(*bl), GFP_KERNEL);
+	if (!bl)
+		return -ENOMEM;
+
+	bl->regmap = chip->regmap;
+	bl->dev = dev;
+
+	/* Allow DT override of default brightness */
+	if (!of_property_read_u32(dev->of_node, "default-brightness", &brightness))
+		props.brightness = clamp_t(u32, brightness,
+					   MAX77696_BL_MIN_BRIGHTNESS,
+					   MAX77696_BL_MAX_BRIGHTNESS);
+
+	bd = devm_backlight_device_register(dev, "max77696-wled", dev, bl,
+					    &max77696_bl_ops, &props);
+	if (IS_ERR(bd))
+		return dev_err_probe(dev, PTR_ERR(bd),
+				     "backlight device register failed\n");
+
+	platform_set_drvdata(pdev, bd);
+
+	/* Apply initial brightness */
+	ret = max77696_bl_set(bl, props.brightness);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to set initial brightness\n");
+
+	dev_info(dev, "MAX77696 WLED backlight registered (brightness=%d/%d)\n",
+		 props.brightness, MAX77696_BL_MAX_BRIGHTNESS);
+
+	return 0;
+}
+
+static const struct of_device_id max77696_bl_of_match[] = {
+	{ .compatible = "maxim,max77696-wled" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max77696_bl_of_match);
+
+static const struct platform_device_id max77696_bl_id[] = {
+	{ "max77696-wled", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, max77696_bl_id);
+
+static struct platform_driver max77696_bl_driver = {
+	.driver = {
+		.name           = "max77696-wled",
+		.of_match_table = max77696_bl_of_match,
+	},
+	.probe    = max77696_bl_probe,
+	.id_table = max77696_bl_id,
+};
+module_platform_driver(max77696_bl_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MAX77696 WLED Backlight Driver");
+MODULE_AUTHOR("smallsolar");

include/linux/mfd/max77696.h

@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2026 smallsolar
+ * Author: smallsolar
+ *
+ * Common definitions for MAXIM 77696 charger/power-supply.
+ */
+
+#ifndef MAX77696_H
+#define MAX77696_H
+
+#include <linux/bits.h>
+
+struct max77696 {
+        struct regmap *regmap;
+        struct device *dev;
+};
+
+#define MAX77696_REG_CID		0x0
+
+#define EPDCNFG_REG       0x60
+#define EPDCNFG_EPDEN     BIT(7)
+#define EPDCNFG_VCOMEN    BIT(6)
+#define EPDCNFG_SSHVDDH   BIT(1)
+
+#define EPDVCOM_REG       0x64
+#define EPDVCOMR_REG      0xB4
+#define EPDVCOMR_VCOMR    BIT(0)
+
+/*
+ * EPDINT (0x62) — interrupt/fault status register.
+ * Bit 6 (0x40): VCOM fault. Set when VCOM rail fails to reach
+ * target voltage. Cleared on read (read-to-clear behaviour confirmed
+ * from stock kernel: max77696_epd_isr() does a single regmap_read
+ * of EPDINT and acts on the result without a separate clear step).
+ *
+ *  The stock driver retries up to MAX77696_EPD_VCOM_FAULT_RETRIES 
+ *  times with a fixed inter-retry delay before giving up.
+ */
+
+#define EPDINT_REG              0x62
+#define EPDINT_VCOM_FAULT       BIT(6)
+#define MAX77696_EPD_VCOM_FAULT_RETRIES   5
+#define MAX77696_EPD_VCOM_SETTLE_MS       100
+#define MAX77696_EPD_VCOM_RETRY_DELAY_MS  100
+
+/*
+ * VCOM is a factory-calibrated, per-panel value (Amazon's stock driver
+ * reads it from a dedicated SPI NOR flash chip on the panel module —
+ * see panel_flash_spi / panel_get_vcom_str() in the vendor 3.0.35 kernel,
+ * drivers/video/mxc/mxc_epdc_fb_lab126.c). Mainline has no driver for
+ * that SPI flash yet, so this value is hardcoded from a one-time read
+ * via the stock firmware's sysfs:
+ *   /sys/devices/platform/imx-i2c.0/i2c-0/0-003c/max77696-epd.0/vcom_microvolt
+ * = 2476280 (µV magnitude; VCOM is a negative bias, per
+ * reg_data[MAX77696_EPD_ID_EPDVCOM].neg_sign in the vendor
+ * drivers/regulator/max77696-epd.c).
+ *
+ * Register encoding (from vendor max77696_epd_vcom_set_voltage()):
+ *   step_uV = 9985, value = round(target_uV / step_uV)
+ *   if (value >= 0xFF) { value -= 0xFF; EPDVCOMR.VCOMR = 1 }
+ *   else                 EPDVCOMR.VCOMR = 0
+ *   EPDVCOM = (u8)value
+ *
+ * 2476280 / 9985 = 248 exactly (248 * 9985 = 2476280, no rounding loss).
+ * 248 < 0xFF, so VCOMR stays 0 and only EPDVCOM needs writing.
+ *
+ * THIS VALUE IS SPECIFIC TO THE PANEL THIS WAS CALIBRATED AGAINST.
+ * Do not reuse on a different physical unit without re-reading its own
+ * factory calibration first.
+ */
+#define VCOM_CAL_REG_VALUE  0x0B
+
+#define LSW4_CNTRL_REG    0x5F
+#define LSW4_OUTLS        BIT(0)
+
+/* WLED register addresses */
+#define LEDBST_CNTRL1_REG   0x6C
+#define LEDBST_CNTRL1_LED1EN    BIT(7)  /* boost + LED enable */
+
+#define LED1CURRENT_1_REG   0x6D   /* bits 11:4 of brightness (MSB) */
+#define LED1CURRENT_2_REG   0x6E   /* bits  3:0 of brightness (LSB) */
+
+#define MAX77696_BL_MAX_BRIGHTNESS  0xFFF  /* 12-bit DAC */
+#define MAX77696_BL_MIN_BRIGHTNESS  0
+
+#endif /* MAX77696_H */

include/linux/platform_data/cyttsp4.h

@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Header file for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
+ * For use with Cypress Txx3xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ *
+ * Contact Cypress Semiconductor at www.cypress.com (kev@cypress.com)
+ */
+#ifndef _CYTTSP4_H_
+#define _CYTTSP4_H_
+
+#define CYTTSP4_MT_NAME "cyttsp4_mt"
+#define CYTTSP4_I2C_NAME "cyttsp4_i2c_adapter"
+#define CYTTSP4_SPI_NAME "cyttsp4_spi_adapter"
+
+#define CY_TOUCH_SETTINGS_MAX 32
+
+struct touch_framework {
+	const uint16_t  *abs;
+	uint8_t         size;
+	uint8_t         enable_vkeys;
+} __packed;
+
+struct cyttsp4_mt_platform_data {
+	struct touch_framework *frmwrk;
+	unsigned short flags;
+	char const *inp_dev_name;
+};
+
+struct touch_settings {
+	const uint8_t *data;
+	uint32_t size;
+	uint8_t tag;
+} __packed;
+
+struct cyttsp4_core_platform_data {
+	int irq_gpio;
+	int rst_gpio;
+	int level_irq_udelay;
+	int (*xres)(struct cyttsp4_core_platform_data *pdata,
+		struct device *dev);
+	int (*init)(struct cyttsp4_core_platform_data *pdata,
+		int on, struct device *dev);
+	int (*power)(struct cyttsp4_core_platform_data *pdata,
+		int on, struct device *dev, atomic_t *ignore_irq);
+	int (*irq_stat)(struct cyttsp4_core_platform_data *pdata,
+		struct device *dev);
+	struct touch_settings *sett[CY_TOUCH_SETTINGS_MAX];
+};
+
+struct cyttsp4_platform_data {
+	struct cyttsp4_core_platform_data *core_pdata;
+	struct cyttsp4_mt_platform_data *mt_pdata;
+};
+
+#endif /* _CYTTSP4_H_ */