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

Chaotian Jing
2017-09-12T09:07:52Z

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 --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 49d4d79..9f21cdb 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1554,7 +1554,8 @@ 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);
--
1.8.1.1.dirty