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

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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: 3cde63ebc85c ("ARM64: dts: meson-gxl: libretech-cc: enable high speed modes")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Cc: stable@vger.kernel.org
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Jerome Brunet 2018-04-26 12:50:46 +02:00 committed by Kevin Hilman
parent ce397d215c
commit d5b4885b1d
1 changed files with 0 additions and 3 deletions
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3
arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
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@ -234,9 +234,6 @@
bus-width = <4>;
cap-sd-highspeed;
sd-uhs-sdr12;
sd-uhs-sdr25;
sd-uhs-sdr50;
max-frequency = <100000000>;
disable-wp;