arm: mach-k3: Add DM reserved memory fixup

Add support for fixing up DM firmware reserved memory in the kernel
device tree for K3 SoCs that use separate DM firmware.

The fixup uses the CONFIG_K3_DM_FW_RESERVED_ADDR and
CONFIG_K3_DM_FW_RESERVED_SIZE Kconfig options to update the
reserved-memory node with the correct DM firmware carveout.

Note that the fixup needs DM reserved memory node is to be renamed in
dts. Example memory@9c900000 → dm@9c900000

Signed-off-by: Paresh Bhagat <p-bhagat@ti.com>
Reviewed-by: Neha Malcom Francis <n-francis@ti.com>

diff --git a/arch/arm/mach-k3/common_fdt.c b/arch/arm/mach-k3/common_fdt.c
index 4b833f5fabedf33912429b7fb465c652efe419e1..18f30e9d052557ac6e9be459bf420bc596ce34be 100644 (file)
--- a/arch/arm/mach-k3/common_fdt.c
+++ b/arch/arm/mach-k3/common_fdt.c
@@ -160,9 +160,23 @@ int fdt_fixup_reserved(void *blob)
        if (ret)
                return ret;
 
-       return fdt_fixup_reserved_memory(blob, "optee",
-                                        CONFIG_K3_OPTEE_LOAD_ADDR,
-                                        CONFIG_K3_OPTEE_RESERVED_SIZE);
+       ret = fdt_fixup_reserved_memory(blob, "optee",
+                                       CONFIG_K3_OPTEE_LOAD_ADDR,
+                                       CONFIG_K3_OPTEE_RESERVED_SIZE);
+
+       if (ret)
+               return ret;
+
+#if defined(CONFIG_K3_DM_FW_RESERVED_ADDR) && defined(CONFIG_K3_DM_FW_RESERVED_SIZE)
+       ret = fdt_fixup_reserved_memory(blob, "dm",
+                                       CONFIG_K3_DM_FW_RESERVED_ADDR,
+                                       CONFIG_K3_DM_FW_RESERVED_SIZE);
+
+       if (ret)
+               return ret;
+#endif
+
+       return 0;
 }
 
 static int fdt_fixup_critical_trips(void *blob, int zoneoffset, int maxc)