Re: [PATCH] ARM64: dts: meson: disable sd-uhs modes on the libretech-cc

From: Kevin Hilman
Date: Fri Apr 27 2018 - 15:15:47 EST

Jerome Brunet <jbrunet@xxxxxxxxxxxx> writes:

> 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@xxxxxxxxxxxx>

Applied to v4.17/fixes, and adding a Cc to stable.