[U-Boot] [PATCH v2] mmc: mmc-uclass: use the fixed devnum with alias node
Jaehoon Chung
jh80.chung at samsung.com
Thu Feb 2 04:41:14 UTC 2017
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 at samsung.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Changelog on V2:
- Add the #ifndef CONFIG_SPL_BUILD
- Fixes the typo by Simon's comment
drivers/mmc/mmc-uclass.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 2fe5d61..de7acb6 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 +194,15 @@ 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;
+
+#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, -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;
--
2.10.2
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