arm: dts: rockchip: Add rk3528-u-boot.dtsi

Add a rk3528-u-boot.dtsi extending the basic dts/upstream rk3528.dtsi
with bare minimum nodes to have a booting system from eMMC and SD-card.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3528-u-boot.dtsi

@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rockchip-u-boot.dtsi"
+
+/ {
+	aliases {
+		mmc0 = &sdhci;
+		mmc1 = &sdmmc;
+	};
+
+	chosen {
+		u-boot,spl-boot-order = "same-as-spl", &sdmmc, &sdhci;
+	};
+
+	dmc {
+		compatible = "rockchip,rk3528-dmc";
+		bootph-all;
+	};
+
+	soc {
+		rng: rng@ffc50000 {
+			compatible = "rockchip,rkrng";
+			reg = <0x0 0xffc50000 0x0 0x200>;
+		};
+
+		otp: nvmem@ffce0000 {
+			compatible = "rockchip,rk3528-otp";
+			reg = <0x0 0xffce0000 0x0 0x4000>;
+		};
+
+		sdmmc: mmc@ffc30000 {
+			compatible = "rockchip,rk3528-dw-mshc",
+				     "rockchip,rk3288-dw-mshc";
+			reg = <0x0 0xffc30000 0x0 0x4000>;
+			clocks = <&cru HCLK_SDMMC0>, <&cru CCLK_SRC_SDMMC0>;
+			clock-names = "biu", "ciu";
+			fifo-depth = <0x100>;
+			interrupts = <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
+			max-frequency = <150000000>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&sdmmc_bus4>, <&sdmmc_clk>, <&sdmmc_cmd>,
+				    <&sdmmc_det>;
+			resets = <&cru SRST_H_SDMMC0>;
+			reset-names = "reset";
+			rockchip,default-sample-phase = <90>;
+			status = "disabled";
+		};
+	};
+};
+
+&cru {
+	bootph-all;
+};
+
+&emmc_bus8 {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&emmc_clk {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&emmc_cmd {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&emmc_strb {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&gmac0_clk {
+	bootph-all;
+};
+
+&ioc_grf {
+	bootph-all;
+};
+
+&otp {
+	bootph-some-ram;
+};
+
+&pcfg_pull_none {
+	bootph-all;
+};
+
+&pcfg_pull_up {
+	bootph-all;
+};
+
+&pcfg_pull_up_drv_level_2 {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&pinctrl {
+	bootph-all;
+};
+
+&sdhci {
+	bootph-pre-ram;
+	bootph-some-ram;
+	u-boot,spl-fifo-mode;
+};
+
+&sdmmc {
+	bootph-pre-ram;
+	bootph-some-ram;
+	u-boot,spl-fifo-mode;
+};
+
+&sdmmc_bus4 {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&sdmmc_clk {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&sdmmc_cmd {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&sdmmc_det {
+	bootph-pre-ram;
+	bootph-some-ram;
+};
+
+&uart0 {
+	bootph-all;
+	clock-frequency = <24000000>;
+};
+
+&uart0m0_xfer {
+	bootph-pre-sram;
+	bootph-pre-ram;
+};
+
+&xin24m {
+	bootph-all;
+};