board: stm32mp1: reserve memory for OP-TEE in device tree

[oweals/u-boot.git] / arch / arm / mach-stm32mp / fdt.c

diff --git a/arch/arm/mach-stm32mp/fdt.c b/arch/arm/mach-stm32mp/fdt.c
index 3ee7d6a83377211106bdeee112d6b526026a0dc8..ae82270e4241f0e8c0e388ace2004bab2bb5dbc6 100644 (file)
--- a/arch/arm/mach-stm32mp/fdt.c
+++ b/arch/arm/mach-stm32mp/fdt.c
@@ -218,6 +218,26 @@ static void stm32_fdt_disable(void *fdt, int offset, u32 addr,
                       string, addr, name);
 }
 
+static void stm32_fdt_disable_optee(void *blob)
+{
+       int off, node;
+
+       off = fdt_node_offset_by_compatible(blob, -1, "linaro,optee-tz");
+       if (off >= 0 && fdtdec_get_is_enabled(blob, off))
+               fdt_status_disabled(blob, off);
+
+       /* Disabled "optee@..." reserved-memory node */
+       off = fdt_path_offset(blob, "/reserved-memory/");
+       if (off < 0)
+               return;
+       for (node = fdt_first_subnode(blob, off);
+            node >= 0;
+            node = fdt_next_subnode(blob, node)) {
+               if (!strncmp(fdt_get_name(blob, node, NULL), "optee@", 6))
+                       fdt_status_disabled(blob, node);
+       }
+}
+
 /*
  * This function is called right before the kernel is booted. "blob" is the
  * device tree that will be passed to the kernel.
@@ -302,5 +322,8 @@ int ft_system_setup(void *blob, bd_t *bd)
                                       "st,package", pkg, false);
        }
 
+       if (!CONFIG_IS_ENABLED(STM32MP1_OPTEE))
+               stm32_fdt_disable_optee(blob);
+
        return ret;
 }