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* [RFC PATCH V3 03/21] mmc: core: UHS-II support, skip set_chip_select()
@ 2020-07-10 11:08 Ben Chuang
  0 siblings, 0 replies; only message in thread
From: Ben Chuang @ 2020-07-10 11:08 UTC (permalink / raw)
  To: adrian.hunter, ulf.hansson
  Cc: linux-mmc, linux-kernel, ben.chuang, takahiro.akashi, greg.tu,
	Ben Chuang

From: AKASHI Takahiro <takahiro.akashi@linaro.org>

mmc_set_chip_select() should be called only in UHS-I mode,
and not for UHS-II mode.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
 drivers/mmc/core/core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 85c83c82ad0c..c6540d56646b 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -898,8 +898,10 @@ static inline void mmc_set_ios(struct mmc_host *host)
  */
 void mmc_set_chip_select(struct mmc_host *host, int mode)
 {
-	host->ios.chip_select = mode;
-	mmc_set_ios(host);
+	if (!(host->flags & MMC_UHS2_INITIALIZED)) {
+		host->ios.chip_select = mode;
+		mmc_set_ios(host);
+	}
 }
 
 /*
-- 
2.27.0


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2020-07-10 11:08 [RFC PATCH V3 03/21] mmc: core: UHS-II support, skip set_chip_select() Ben Chuang

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