linux-kernel - Re: [PATCH] ARM64: dts: meson-gxbb: p20x: add card regulator settle times

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Message-ID: <7h1sovysp6.fsf@baylibre.com>
Date:   Tue, 01 Aug 2017 12:49:09 -0700
From:   Kevin Hilman <khilman@...libre.com>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     Carlo Caione <carlo@...one.org>, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH] ARM64: dts: meson-gxbb: p20x: add card regulator settle times

Jerome Brunet <jbrunet@...libre.com> writes:

> Changing the card voltage on the p200 is not instantaneous, especially
> when switching from 3.3v to 1.8v.
>
> I take at least 70ms for the regulator to go from 3.3v to 1.8v. Add
> margin to that to make sure we don't upset the sdcard during the voltage
> switch
>
> Fixes: ef8d2ffedf18 ("ARM64: dts: meson-gxbb: add MMC support")
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>

Applied to v4.14/dt64,

Thanks,

Kevin