[U-Boot] [PATCH] powerpc: Add support for CONFIG_OF_CONTROL

[Jonathan Klee <klee.jonathan@gmail.com>]

Allow a device tree to be provided through the standard mechanisms.

Tests have been made using CONFIG_OF_SEPERATE on a MPC8378 board.
---
 arch/powerpc/lib/board.c |   22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index 422b4a3..3a9a6ce 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -26,6 +26,8 @@
 #include <command.h>
 #include <malloc.h>
 #include <stdio_dev.h>
+#include <libfdt.h>
+#include <fdtdec.h>
 #ifdef CONFIG_8xx
 #include <mpc8xx.h>
 #endif
@@ -124,6 +126,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 extern ulong __init_end;
 extern ulong __bss_end;
+extern ulong __stop___ex_table;
 ulong monitor_flash_len;
 
 #if defined(CONFIG_CMD_BEDBUG)
@@ -255,6 +258,21 @@ int init_func_watchdog_reset(void)
  * Initialization sequence
  */
 
+#ifdef CONFIG_OF_CONTROL
+int find_fdt(void)
+{
+#ifdef CONFIG_OF_EMBED
+	/* get a pointer to the FDT */
+	gd->fdt_blob = _binary_dt_dtb_start;
+#elif defined CONFIG_OF_SEPARATE
+	gd->fdt_blob = (void *)&__stop___ex_table;
+#endif
+	gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
+						(uintptr_t)gd->fdt_blob);
+	return 0;
+}
+#endif
+
 static init_fnc_t *init_sequence[] = {
 #if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
 	probecpu,
@@ -321,6 +339,10 @@ static init_fnc_t *init_sequence[] = {
 #endif
 	INIT_FUNC_WATCHDOG_RESET
 	init_func_ram,
+#ifdef CONFIG_OF_CONTROL
+	find_fdt,
+	fdtdec_check_fdt,
+#endif
 #if defined(CONFIG_SYS_DRAM_TEST)
 	testdram,
 #endif /* CONFIG_SYS_DRAM_TEST */
-- 
1.7.10.4