From: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
1. when f_init is zero, the SDHC can't work correctly, so f_min will replace it.
2. Before running get_cd recall function to detect if the card is present,
must make sure the power is up.
Signed-off-by: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
---
drivers/mmc/core/core.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 1f453ac..5a22b85 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -993,7 +993,10 @@ static void mmc_power_up(struct mmc_host *host)
*/
mmc_delay(10);
- host->ios.clock = host->f_init;
+ if (host->f_init)
+ host->ios.clock = host->f_init;
+ else
+ host->ios.clock = host->f_min;
host->ios.power_mode = MMC_POWER_ON;
mmc_set_ios(host);
@@ -1571,8 +1574,10 @@ void mmc_rescan(struct work_struct *work)
*/
mmc_bus_put(host);
+ mmc_power_up(host);
if (host->ops->get_cd && host->ops->get_cd(host) == 0)
goto out;
+ mmc_power_off(host);
mmc_claim_host(host);
for (i = 0; i < ARRAY_SIZE(freqs); i++) {
--
1.7.4.1
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