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cmd_mmc: make mmc dev always re-probe the HW

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Currently, U-Boot behaves as follows:

- Begin with no SD card inserted in "mmc 1"
- Execute: mmc dev 1
- This fails, since there is no card
- User plugs in an SD card
- Execute: mmc dev 1
- This still fails, since the HW isn't reprobed.

With this change, U-Boot behaves as follows:

- Begin with no SD card inserted in "mmc 1"
- Execute: mmc dev 1
- This fails, since there is no card
- User plugs in an SD card
- Execute: mmc dev 1
- The newly present SD card is detected

I know that "mmc rescan" will force the HW to be reprobed, but I feel it
makes more sense if "mmc dev" always reprobes the HW after selecting the
current MMC device. This allows scripts to just execute "mmc dev", and
not have to also execute "mmc rescan" to check for media presense.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
This commit is contained in:
Stephen Warren 2014-05-23 13:24:47 -06:00 committed by Pantelis Antoniou
parent 941944e445
commit a5710920b7
1 changed files with 1 additions and 1 deletions
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2
common/cmd_mmc.c
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@ -418,7 +418,7 @@ static int do_mmc_dev(cmd_tbl_t *cmdtp, int flag,
return CMD_RET_USAGE; return CMD_RET_USAGE;
} }
mmc = init_mmc_device(dev, false); mmc = init_mmc_device(dev, true);
if (!mmc) if (!mmc)
return CMD_RET_FAILURE; return CMD_RET_FAILURE;