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mmc: mmc-uclass: use the fixed devnum with alias node 

If there are alias nodes as "mmc", use the devnum as alias 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 alias node is better than it.

Usage:
alaise {
	....
	mmc0 = &sdhci2; /* eMMC */
	mmc1 = &sdhci1; /* SD */
	...
}

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jaehoon Chung 2017-02-02 13:41:14 +09:00
parent 22940af121
commit 02ad33aa3a
1 changed files with 10 additions and 3 deletions
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13
drivers/mmc/mmc-uclass.c
View File

@ -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 +194,15 @@ 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;
ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC, -1, 512,
0, &bdev);
#ifndef CONFIG_SPL_BUILD
/* Use the fixed index with aliase node's index */
fdtdec_get_alias_seq(gd->fdt_blob, "mmc", dev->of_offset, &devnum);
#endif
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;