ARM: omap: Allow to set mmc devname used for booting

This adds a omap_set_bootmmc_devname function which can be used
to specify the MMC boot device. In an xload configuration this
is then used to load the next stage. In a regular build this is
used to mount /boot.
Also a device_detect_by_name is added to allow to disable probing
for sd/mmc cards during startup.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 16 insertions, 3 deletions

diff --git a/arch/arm/mach-omap/xload.c b/arch/arm/mach-omap/xload.c
index 76746e27bd..b4d1b55e57 100644
--- a/arch/arm/mach-omap/xload.c
+++ b/arch/arm/mach-omap/xload.c
@@ -8,6 +8,7 @@
 #include <fs.h>
 #include <fcntl.h>
 #include <sizes.h>
+#include <malloc.h>
 #include <filetype.h>
 #include <mach/generic.h>
 
@@ -98,11 +99,23 @@ static void *omap_xload_boot_mmc(void)
 	int ret;
 	void *buf;
 	int len;
-	const char *diskdev = "disk0.0";
+	const char *diskdev;
+	char *partname;
+
+	diskdev = omap_get_bootmmc_devname();
+	if (!diskdev)
+		diskdev = "disk0";
+
+	device_detect_by_name(diskdev);
+
+	partname = asprintf("%s.0", diskdev);
+
+	ret = mount(partname, "fat", "/");
+
+	free(partname);
 
-	ret = mount(diskdev, "fat", "/");
 	if (ret) {
-		printf("Unable to mount %s (%d)\n", diskdev, ret);
+		printf("Unable to mount %s (%d)\n", partname, ret);
 		return NULL;
 	}