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From 81fdc4983e33ef01935a9bf01187951aad34e2ac Mon Sep 17 00:00:00 2001
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From: Chaotian Jing <chaotian.jing@mediatek.com>
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Date: Mon, 16 Oct 2017 09:46:39 +0800
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Subject: [PATCH 160/224] mmc: mediatek: perfer to use rise edge latching for
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cmd line
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data lines have applied to perfer to use rise edge, also need
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apply it to cmd line.
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Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
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Tested-by: Sean Wang <sean.wang@mediatek.com>
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Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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---
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drivers/mmc/host/mtk-sd.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/mmc/host/mtk-sd.c
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+++ b/drivers/mmc/host/mtk-sd.c
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@@ -1550,7 +1550,8 @@ static int msdc_tune_response(struct mmc
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}
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final_rise_delay = get_best_delay(host, rise_delay);
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/* if rising edge has enough margin, then do not scan falling edge */
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- if (final_rise_delay.maxlen >= 12 && final_rise_delay.start < 4)
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+ if (final_rise_delay.maxlen >= 12 ||
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+ (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
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goto skip_fall;
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sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
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