From 655babbde6fdbd5a4a4072b7cdd8b1fb1a23db24 Mon Sep 17 00:00:00 2001 From: Doug Anderson Date: Fri, 20 Feb 2015 10:57:18 -0800 Subject: [PATCH] mmc: dw_mmc: Make sure we only adjust the clock when power is on It appears that we can confuse things if we try to turn on the MMC clock when the power is off. Adjust is so that we turn the clock on (using dw_mci_setup_bus) after power is all the way on and we turn the clock off before the power goes off. Signed-off-by: Doug Anderson Tested-by: Javier Martinez Canillas Signed-off-by: Jaehoon Chung Signed-off-by: Ulf Hansson --- drivers/mmc/host/dw_mmc.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index bed0f94..a5315b2 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1102,12 +1102,6 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (drv_data && drv_data->set_ios) drv_data->set_ios(slot->host, ios); - /* Slot specific timing and width adjustment */ - dw_mci_setup_bus(slot, false); - - if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) - slot->host->state = STATE_IDLE; - switch (ios->power_mode) { case MMC_POWER_UP: if (!IS_ERR(mmc->supply.vmmc)) { @@ -1134,8 +1128,15 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) else slot->host->vqmmc_enabled = true; } + + /* Adjust clock / bus width after power is up */ + dw_mci_setup_bus(slot, false); + break; case MMC_POWER_OFF: + /* Turn clock off before power goes down */ + dw_mci_setup_bus(slot, false); + if (!IS_ERR(mmc->supply.vmmc)) mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); @@ -1151,6 +1152,9 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) default: break; } + + if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) + slot->host->state = STATE_IDLE; } static int dw_mci_card_busy(struct mmc_host *mmc) -- 2.7.4