Commit 773dc118 authored by Guenter Roeck's avatar Guenter Roeck Committed by Ulf Hansson

mmc: core: Fix access to HS400-ES devices

HS400-ES devices fail to initialize with the following error messages.

mmc1: power class selection to bus width 8 ddr 0 failed
mmc1: error -110 whilst initialising MMC card

This was seen on Samsung Chromebook Plus. Code analysis points to
commit 3d4ef329 ("mmc: core: fix multi-bit bus width without
high-speed mode"), which attempts to set the bus width for all but
HS200 devices unconditionally. However, for HS400-ES, the bus width
is already selected.

Cc: Anssi Hannula <anssi.hannula@bitwise.fi>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Fixes: 3d4ef329 ("mmc: core: fix multi-bit bus width ...")
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Reviewed-by: default avatarShawn Lin <shawn.lin@rock-chip.com>
Tested-by: default avatarHeiko Stuebner <heiko@sntech.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 16681037
...@@ -1730,7 +1730,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, ...@@ -1730,7 +1730,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
err = mmc_select_hs400(card); err = mmc_select_hs400(card);
if (err) if (err)
goto free_card; goto free_card;
} else { } else if (!mmc_card_hs400es(card)) {
/* Select the desired bus width optionally */ /* Select the desired bus width optionally */
err = mmc_select_bus_width(card); err = mmc_select_bus_width(card);
if (err > 0 && mmc_card_hs(card)) { if (err > 0 && mmc_card_hs(card)) {
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment