Commit 728ea230 authored by Jerome Brunet's avatar Jerome Brunet Committed by Greg Kroah-Hartman

ARM64: dts: meson: disable sd-uhs modes on the libretech-cc

commit d5b4885b upstream.

There is a problem with the sd-uhs mode when doing a soft reboot.
Switching back from 1.8v to 3.3v messes with the card, which no longer
respond (timeout errors). According to the specification, we should
perform a card reset (power cycling the card) but this is something we
cannot control on this design.

Then the only solution to restore the communication with the card is an
"unplug-plug" which is not acceptable

Until we find a solution, if any, disable the sd-uhs modes on this design.
For the people using uhs at the moment, there will a performance drop as
a result.

Fixes: 3cde63eb ("ARM64: dts: meson-gxl: libretech-cc: enable high speed modes")
Signed-off-by: default avatarJerome Brunet <jbrunet@baylibre.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarKevin Hilman <khilman@baylibre.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 64df84dc
......@@ -205,9 +205,6 @@ &sd_emmc_b {
bus-width = <4>;
cap-sd-highspeed;
sd-uhs-sdr12;
sd-uhs-sdr25;
sd-uhs-sdr50;
max-frequency = <100000000>;
disable-wp;
......
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