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mmc: sd: add reset bus_ops callback

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Enable power cycle and re-initialization of SD cards via the reset
bus_ops. Power cycling a buggy SD card sometimes helps it get back on
track.

Signed-off-by: Johan Rudholm <johanru@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Johan Rudholm 2015-01-12 15:38:06 +01:00 committed by Ulf Hansson
parent f855a3717e
commit dc0ecfef29
1 changed files with 7 additions and 0 deletions
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7
drivers/mmc/core/sd.c
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@ -1197,6 +1197,12 @@ static int mmc_sd_power_restore(struct mmc_host *host)
return ret;
}
static int mmc_sd_reset(struct mmc_host *host)
{
mmc_power_cycle(host, host->card->ocr);
return mmc_sd_power_restore(host);
}
static const struct mmc_bus_ops mmc_sd_ops = {
.remove = mmc_sd_remove,
.detect = mmc_sd_detect,
@ -1207,6 +1213,7 @@ static const struct mmc_bus_ops mmc_sd_ops = {
.power_restore = mmc_sd_power_restore,
.alive = mmc_sd_alive,
.shutdown = mmc_sd_suspend,
.reset = mmc_sd_reset,
};
/*