bc1e7469aa
https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git/commit/?h=fixes&id=9f327845358d3dd0d8a5a7a5436b0aa5c432e757 Signed-off-by: Tim Harvey <tharvey@gateworks.com>
42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
From 9f327845358d3dd0d8a5a7a5436b0aa5c432e757 Mon Sep 17 00:00:00 2001
|
|
From: Haibo Chen <haibo.chen@nxp.com>
|
|
Date: Wed, 19 Apr 2017 10:53:51 +0800
|
|
Subject: [PATCH] mmc: sdhci-esdhc-imx: increase the pad I/O drive strength for
|
|
DDR50 card
|
|
|
|
Currently for DDR50 card, it need tuning in default. We meet tuning fail
|
|
issue for DDR50 card and some data CRC error when DDR50 sd card works.
|
|
|
|
This is because the default pad I/O drive strength can't make sure DDR50
|
|
card work stable. So increase the pad I/O drive strength for DDR50 card,
|
|
and use pins_100mhz.
|
|
|
|
This fixes DDR50 card support for IMX since DDR50 tuning was enabled from
|
|
commit 9faac7b95ea4 ("mmc: sdhci: enable tuning for DDR50")
|
|
|
|
Tested-and-reported-by: Tim Harvey <tharvey@gateworks.com>
|
|
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
|
|
Cc: stable@vger.kernel.org # v4.4+
|
|
Acked-by: Dong Aisheng <aisheng.dong@nxp.com>
|
|
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
|
|
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
|
|
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
|
|
---
|
|
drivers/mmc/host/sdhci-esdhc-imx.c | 1 +
|
|
1 file changed, 1 insertion(+)
|
|
|
|
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
|
|
index 7123ef9..445fc47 100644
|
|
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
|
|
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
|
|
@@ -830,6 +830,7 @@ static int esdhc_change_pinstate(struct sdhci_host *host,
|
|
|
|
switch (uhs) {
|
|
case MMC_TIMING_UHS_SDR50:
|
|
+ case MMC_TIMING_UHS_DDR50:
|
|
pinctrl = imx_data->pins_100mhz;
|
|
break;
|
|
case MMC_TIMING_UHS_SDR104:
|
|
--
|
|
2.7.4
|
|
|