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>
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@ -13,6 +13,8 @@
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#include <dm/root.h>
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#include <dm/root.h>
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#include "mmc_private.h"
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#include "mmc_private.h"
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_DM_MMC_OPS
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#ifdef CONFIG_DM_MMC_OPS
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int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
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int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
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struct mmc_data *data)
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struct mmc_data *data)
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@ -192,10 +194,15 @@ int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
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{
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{
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struct blk_desc *bdesc;
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struct blk_desc *bdesc;
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struct udevice *bdev;
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struct udevice *bdev;
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int ret;
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int ret, devnum = -1;
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ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC, -1, 512,
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#ifndef CONFIG_SPL_BUILD
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0, &bdev);
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/* Use the fixed index with aliase node's index */
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fdtdec_get_alias_seq(gd->fdt_blob, "mmc", dev->of_offset, &devnum);
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#endif
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ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC,
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devnum, 512, 0, &bdev);
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if (ret) {
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if (ret) {
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debug("Cannot create block device\n");
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debug("Cannot create block device\n");
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return ret;
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return ret;
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