[U-Boot] [PATCH] Add support for initializing MMC

[tien.fong.chee at intel.com]

From: Tien Fong Chee <tien.fong.chee at intel.com>

Firmware loader would encounter problem if the MMC is accessed before
initializing it. This patch would adding the support of initializing
MMC before the MMC is accessed by firmware loader.

Signed-off-by: Tien Fong Chee <tien.fong.chee at intel.com>
---
 drivers/misc/fs_loader.c |   31 +++++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/drivers/misc/fs_loader.c b/drivers/misc/fs_loader.c
index 57a14a3..744fa46 100644
--- a/drivers/misc/fs_loader.c
+++ b/drivers/misc/fs_loader.c
@@ -12,6 +12,7 @@
 #include <linux/string.h>
 #include <mapmem.h>
 #include <malloc.h>
+#include <mmc.h>
 #include <spl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -252,6 +253,36 @@ static int fs_loader_ofdata_to_platdata(struct udevice *dev)
 
 static int fs_loader_probe(struct udevice *dev)
 {
+#ifdef CONFIG_MMC
+	int ret;
+	struct device_platdata *plat = dev->platdata;
+
+	ret = mmc_initialize(NULL);
+	if (ret) {
+		debug("MMC: could not initialize mmc. error: %d\n", ret);
+
+		return ret;
+	}
+
+	if (plat->phandlepart.phandle) {
+		ofnode node = ofnode_get_by_phandle(plat->phandlepart.phandle);
+
+		struct udevice *mmc_dev = NULL;
+
+		ret = device_get_global_by_ofnode(node, &mmc_dev);
+		if (!ret) {
+			struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
+
+			ret = mmc_init(mmc);
+			if (ret) {
+				debug("MMC: mmc init failed with error: %d\n",
+					ret);
+
+				return ret;
+			}
+		}
+	}
+#endif
 	return 0;
 };
 
-- 
1.7.7.4