ARM: rpi: Add CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG support

Add CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG support and enable it to set
'board_rev' and 'board_name' envs.
'board_rev' can be used in scripts to determine what board we are running on
and 'board_name' for pretty printing.

Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr>

Cc: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>

board/raspberrypi/rpi/rpi.c

@@ -242,10 +242,23 @@ static void set_usbethaddr(void)
 	return;
 }
 
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+static void set_board_info(void)
+{
+	char str_rev[11];
+	sprintf(str_rev, "0x%X", rpi_board_rev);
+	setenv("board_rev", str_rev);
+	setenv("board_name", models[rpi_board_rev].name);
+}
+#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
+
 int misc_init_r(void)
 {
 	set_fdtfile();
 	set_usbethaddr();
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+	set_board_info();
+#endif
 	return 0;
 }
 

include/configs/rpi-common.h

@@ -133,6 +133,7 @@
 #include <config_distro_defaults.h>
 
 /* Environment */
+#define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 #define ENV_DEVICE_SETTINGS \
 	"stdin=serial,lcd\0" \
 	"stdout=serial,lcd\0" \