[PATCH 05/12] mmc: core: disable full power cycle for SD4.0

micky_ching at realsil.com.cn micky_ching at realsil.com.cn
Wed Apr 29 01:23:37 UTC 2015


From: Micky Ching <micky_ching at realsil.com.cn>

We should not do power cycle when card is in SD4.0 mode,
if we power off, we should detect UHSII interface again.
so we can disable it when card is in UHSII mode.

Signed-off-by: Micky Ching <micky_ching at realsil.com.cn>
Signed-off-by: Wei Wang <wei_wang at realsil.com.cn>
---
 drivers/mmc/core/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index ebb6fea..4c5433b 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1550,7 +1550,8 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
 		return 0;
 	}
 
-	if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) {
+	if (!mmc_card_uhsii(host->card) &&
+		(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) {
 		bit = ffs(ocr) - 1;
 		ocr &= 3 << bit;
 		mmc_power_cycle(host, ocr);
-- 
1.9.1



More information about the devel mailing list