Enable power cycle and re-initialization of SD cards via the hw_reset
bus_ops. Power cycling a buggy SD card sometimes helps it get back on
track.
Signed-off-by: Johan Rudholm <johanru@xxxxxxxx>
---
drivers/mmc/core/sd.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 29fccdc..1228ef7 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_hw_reset(struct mmc_host *host)
+{
+ mmc_power_cycle(host, host->card->ocr);
+ return 0;
+}
+
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,
+ .hw_reset = mmc_sd_hw_reset,
};
/*
--
1.7.2.5
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