mmc: sdio: add reset callback to bus operations

Some drivers schedule automatic hw resets. An example is mwifiex,
which schedules a card reset if the command handler between driver
and card firmware becomes out of sync

Signed-off-by: Andreas Fenkart <afenkart@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 5bc6c7dbbd6088153b6ee2bda65730caccea0a8a..f6c28a7ea8df8a08c2af98d768c261255d173c67 100644 (file)
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -1056,6 +1056,12 @@ static int mmc_sdio_runtime_resume(struct mmc_host *host)
        return mmc_sdio_power_restore(host);
 }
 
+static int mmc_sdio_reset(struct mmc_host *host)
+{
+       mmc_power_cycle(host, host->card->ocr);
+       return mmc_sdio_power_restore(host);
+}
+
 static const struct mmc_bus_ops mmc_sdio_ops = {
        .remove = mmc_sdio_remove,
        .detect = mmc_sdio_detect,
@@ -1066,6 +1072,7 @@ static const struct mmc_bus_ops mmc_sdio_ops = {
        .runtime_resume = mmc_sdio_runtime_resume,
        .power_restore = mmc_sdio_power_restore,
        .alive = mmc_sdio_alive,
+       .reset = mmc_sdio_reset,
 };