diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.14/0160-mmc-mediatek-perfer-to-use-rise-edge-latching-for-cm.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.14/0160-mmc-mediatek-perfer-to-use-rise-edge-latching-for-cm.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.14/0160-mmc-mediatek-perfer-to-use-rise-edge-latching-for-cm.patch b/target/linux/mediatek/patches-4.14/0160-mmc-mediatek-perfer-to-use-rise-edge-latching-for-cm.patch new file mode 100644 index 0000000000..c34bf12445 --- /dev/null +++ b/target/linux/mediatek/patches-4.14/0160-mmc-mediatek-perfer-to-use-rise-edge-latching-for-cm.patch @@ -0,0 +1,33 @@ +From 81fdc4983e33ef01935a9bf01187951aad34e2ac Mon Sep 17 00:00:00 2001 +From: Chaotian Jing <chaotian.jing@mediatek.com> +Date: Mon, 16 Oct 2017 09:46:39 +0800 +Subject: [PATCH 160/224] mmc: mediatek: perfer to use rise edge latching for + cmd line + +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> +Tested-by: Sean Wang <sean.wang@mediatek.com> +Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> +--- + 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 95759bba0dd0..27a62254f12f 100644 +--- a/drivers/mmc/host/mtk-sd.c ++++ b/drivers/mmc/host/mtk-sd.c +@@ -1550,7 +1550,8 @@ 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); +-- +2.11.0 + |