diff mbox

[v4,12/12] mmc: mediatek: perfer to use rise edge latching for cmd line

Message ID 1507627831-29323-13-git-send-email-chaotian.jing@mediatek.com (mailing list archive)
State New, archived
Headers show

Commit Message

Chaotian Jing Oct. 10, 2017, 9:30 a.m. UTC 
data lines have applied to perfer to use rise edge, also need
apply it to cmd line.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
---
 drivers/mmc/host/mtk-sd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 4cffc04..731574e 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1558,7 +1558,8 @@  static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
 	}
 	final_rise_delay = get_best_delay(host, rise_delay);
 	/* if rising edge has enough margin, then do not scan falling edge */
-	if (final_rise_delay.maxlen >= 12 && final_rise_delay.start < 4)
+	if (final_rise_delay.maxlen >= 12 ||
+	    (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
 		goto skip_fall;
 
 	sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);