[PATCH v4 1/3] mmc: dw_mmc: update clock after host reach a stable voltage

[Addy Ke]

As show in mmc_power_up(), in MMC_POWER_UP state, the voltage isn't
stable and we may get 'data busy' which can't be cleaned by resetting
all blocks. So we should not send command to update clock in this state.

Signed-off-by: Addy Ke <addy.ke@xxxxxxxxxxxxxx>
---
 drivers/mmc/host/dw_mmc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 4d2e3c2..3472f9b 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1102,7 +1102,8 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		drv_data->set_ios(slot->host, ios);
 
 	/* Slot specific timing and width adjustment */
-	dw_mci_setup_bus(slot, false);
+	if (ios->power_mode != MMC_POWER_UP)
+		dw_mci_setup_bus(slot, false);
 
 	if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0)
 		slot->host->state = STATE_IDLE;
-- 
1.8.3.2


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/