mmc: fix the wrong disabling clock
When power is off, clock is not disabling.
Because it's passed to 1, mmc->clock should be set to f_min value.
Some drivers can't initialize the eMMC/SD card with current status.
This patch is to fix the disabling clock value to 0.
Fixes: 2e7410d76ad1 ("mmc: disable the mmc clock during power off")
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Tested-by: Guillaume GARDET <guillaume.gardet@free.fr>
Tested-by: Anand Moon <linux.amoon@gmail.com>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 53c8191..311f51f 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1501,11 +1501,13 @@
int mmc_set_clock(struct mmc *mmc, uint clock, bool disable)
{
- if (clock > mmc->cfg->f_max)
- clock = mmc->cfg->f_max;
+ if (!disable && clock != 0) {
+ if (clock > mmc->cfg->f_max)
+ clock = mmc->cfg->f_max;
- if (clock < mmc->cfg->f_min)
- clock = mmc->cfg->f_min;
+ if (clock < mmc->cfg->f_min)
+ clock = mmc->cfg->f_min;
+ }
mmc->clock = clock;
mmc->clk_disable = disable;
@@ -2449,7 +2451,7 @@
static int mmc_power_off(struct mmc *mmc)
{
- mmc_set_clock(mmc, 1, true);
+ mmc_set_clock(mmc, 0, true);
#if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
if (mmc->vmmc_supply) {
int ret = regulator_set_enable(mmc->vmmc_supply, false);