If there are aliase nodes as "mmc", use the devnum as aliase index number. This patch is for fixing a problem of Exynos4 series. Problem is the below thing.
Current legacy mode: EXYNOS DWMMC: 0, SAMSUNG SDHCI: 1
After using DM: SAMSUNG SDHCI: 0, EXYNOS DWMMC: 1
Dev index is swapped. Then u-boot can't find the kernel image..because it is already set to 0 as mmcdev. If change from legacy to DM, also needs to touch all exynos4 config file. For using simply, just supporting the fixed devnum with aliase node is better than it.
Usage: alaise { .... mmc0 = &sdhci2; /* eMMC */ mmc1 = &sdhci1; /* SD */ ... }
Signed-off-by: Jaehoon Chung jh80.chung@samsung.com --- drivers/mmc/mmc-uclass.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c index 2fe5d61..a6c8458 100644 --- a/drivers/mmc/mmc-uclass.c +++ b/drivers/mmc/mmc-uclass.c @@ -13,6 +13,8 @@ #include <dm/root.h> #include "mmc_private.h"
+DECLARE_GLOBAL_DATA_PTR; + #ifdef CONFIG_DM_MMC_OPS int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data) @@ -192,10 +194,13 @@ int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg) { struct blk_desc *bdesc; struct udevice *bdev; - int ret; + int ret, devnum = -1; + + /* Use the fixed index with aliase node's index */ + fdtdec_get_alias_seq(gd->fdt_blob, "mmc", dev->of_offset, &devnum);
- ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC, -1, 512, - 0, &bdev); + ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC, + devnum, 512, 0, &bdev); if (ret) { debug("Cannot create block device\n"); return ret;