From dc0ecfef29c60d3765f8e7991b3a4527733238b1 Mon Sep 17 00:00:00 2001 From: Johan Rudholm Date: Mon, 12 Jan 2015 15:38:06 +0100 Subject: [PATCH] mmc: sd: add reset bus_ops callback 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 Signed-off-by: Ulf Hansson --- drivers/mmc/core/sd.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 29fccdcacd68..36d5333838cb 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -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, }; /* -- 2.20.1