From: yong mao <yong.mao@xxxxxxxxxxxx> If SDIO device is initialized by UHS mode, it will run with 1.8v power. In this mode, mmc_go_idle may not make SDIO device go idle successfully in some special SDIO device. And then it can't be re-initialized successfully. According to the logic in sdio_reset_comm and mmc_sdio_sw_reset, invoking mmc_set_clock(host, host->f_min) before mmc_send_io_op_cond can make this SDIO device back to right state. Signed-off-by: Yong Mao <yong.mao@xxxxxxxxxxxx> --- drivers/mmc/core/sdio.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index f173cad..dc4dc63 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -850,6 +850,7 @@ static int mmc_sdio_reinit_card(struct mmc_host *host) sdio_reset(host); mmc_go_idle(host); + mmc_set_clock(host, host->f_min); mmc_send_if_cond(host, host->card->ocr); ret = mmc_send_io_op_cond(host, 0, NULL); -- 1.9.1
