arm: mach-k3: am62p: Fixup TF-A/OP-TEE reserved-memory node in FDT

The address we load TFA and OPTEE is configurable by the
CONFIG_K3_{ATF,OPTEE)_LOAD_ADDR, but the DT node reservations remain
static which can cause some confusion about where exactly these firmware
are exactly. Fix this by updating the reserved-memory{} nodes when the
loaded address does not match the address in DT.

Reported-by: Andrew Davis <afd@ti.com>
Signed-off-by: Bryan Brattlof <bb@ti.com>

arch/arm/mach-k3/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_SOC_K3_J721S2) += j721s2_fdt.o
 obj-$(CONFIG_SOC_K3_AM625) += am625_fdt.o
 obj-$(CONFIG_SOC_K3_AM62A7) += am62a7_fdt.o
 obj-$(CONFIG_SOC_K3_J784S4) += j784s4_fdt.o
+obj-$(CONFIG_SOC_K3_AM62P5) += am62p5_fdt.o
 endif
 ifeq ($(CONFIG_SPL_BUILD),y)
 obj-$(CONFIG_SOC_K3_AM654) += am654_init.o

arch/arm/mach-k3/am62p5_fdt.c

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#include <asm/hardware.h>
+#include "common_fdt.h"
+#include <fdt_support.h>
+
+int ft_system_setup(void *blob, struct bd_info *bd)
+{
+	fdt_fixup_reserved(blob, "tfa", CONFIG_K3_ATF_LOAD_ADDR, 0x80000);
+	fdt_fixup_reserved(blob, "optee", CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000);
+
+	return 0;
+}

arch/arm/mach-k3/am62px/Kconfig

@@ -13,6 +13,7 @@ config TARGET_AM62P5_A53_EVM
 	bool "TI K3 based AM62P5 EVM running on A53"
 	select ARM64
 	select BINMAN
+	select OF_SYSTEM_SETUP
 
 config TARGET_AM62P5_R5_EVM
 	bool "TI K3 based AM62P5 EVM running on R5"