mmc: sdhci-esdhc-imx: increase the pad I/O drive strength for DDR50 card
authorHaibo Chen <haibo.chen@nxp.com>
Wed, 19 Apr 2017 02:53:51 +0000 (10:53 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 27 Apr 2017 07:09:33 +0000 (09:09 +0200)
commitb74ba9dd91e53a3f182e7a2a9cefe709743c7a5f
treeda392a4862a50b968575edf8d695b31917df952c
parent6986d0d29f3cda9f558461202d86464403454574
mmc: sdhci-esdhc-imx: increase the pad I/O drive strength for DDR50 card

commit 9f327845358d3dd0d8a5a7a5436b0aa5c432e757 upstream.

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>
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/host/sdhci-esdhc-imx.c