From 7405df4c79cd7b4204c5b4b5af2b1ad362ea85ad Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Thu, 5 Apr 2018 16:31:25 +0200 Subject: mmc: core: Implement ->sw_reset bus ops for SDIO Let's implement the ->sw_reset() bus ops to allow SDIO func drivers, in particular, to make a SW reset without doing a full power cycle of the SDIO card. Signed-off-by: Ulf Hansson Tested-by: Quentin Schulz Reviewed-by: Shawn Lin --- drivers/mmc/core/sdio.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/mmc/core/sdio.c') diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 362737052f84..a86490dbca70 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -1056,6 +1056,18 @@ static int mmc_sdio_hw_reset(struct mmc_host *host) return mmc_sdio_power_restore(host); } +static int mmc_sdio_sw_reset(struct mmc_host *host) +{ + mmc_set_clock(host, host->f_init); + sdio_reset(host); + mmc_go_idle(host); + + mmc_set_initial_state(host); + mmc_set_initial_signal_voltage(host); + + return mmc_sdio_reinit_card(host, 0); +} + static const struct mmc_bus_ops mmc_sdio_ops = { .remove = mmc_sdio_remove, .detect = mmc_sdio_detect, @@ -1067,6 +1079,7 @@ static const struct mmc_bus_ops mmc_sdio_ops = { .power_restore = mmc_sdio_power_restore, .alive = mmc_sdio_alive, .hw_reset = mmc_sdio_hw_reset, + .sw_reset = mmc_sdio_sw_reset, }; -- cgit v1.2.3-59-g8ed1b