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

[Bryan Brattlof]

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 at ti.com>
Signed-off-by: Bryan Brattlof <bb at ti.com>
---
Hello everyone,

This is a little fixup to avoid any confusion once we're in the kernel. 
Because TF-A can be configured in U-Boot to be anywhere we want, we need 
up update the reserved-memory{} node with this change.

Thanks for reviewing
~Bryan
---
 arch/arm/mach-k3/Makefile       |  1 +
 arch/arm/mach-k3/am62p5_fdt.c   | 16 ++++++++++++++++
 arch/arm/mach-k3/am62px/Kconfig |  1 +
 3 files changed, 18 insertions(+)

diff --git a/arch/arm/mach-k3/Makefile b/arch/arm/mach-k3/Makefile
index 1bd523329a4f8..4e9d0925f13f5 100644
--- a/arch/arm/mach-k3/Makefile
+++ b/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
diff --git a/arch/arm/mach-k3/am62p5_fdt.c b/arch/arm/mach-k3/am62p5_fdt.c
new file mode 100644
index 0000000000000..d67f012a5dcc4
--- /dev/null
+++ b/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;
+}
diff --git a/arch/arm/mach-k3/am62px/Kconfig b/arch/arm/mach-k3/am62px/Kconfig
index 38a9e6811b119..76ae86b66222f 100644
--- a/arch/arm/mach-k3/am62px/Kconfig
+++ b/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"

---
base-commit: a7f0154c412859323396111dd0c09dbafbc153cb
change-id: 20240520-am62p-fdt-fix-7c51e1a1cd54

Best regards,
-- 
Bryan Brattlof <bb at ti.com>