linux-kernel - Re: [PATCH] arm64: dts: allwinner: a64: sopine-baseboard: Add PHY regulator delay

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Message-ID: <20190930142110.vscmnupg6lqrbmuy@gilmour>
Date:   Mon, 30 Sep 2019 16:21:10 +0200
From:   Maxime Ripard <mripard@...nel.org>
To:     Jernej Skrabec <jernej.skrabec@...l.net>
Cc:     wens@...e.org, robh+dt@...nel.org, mark.rutland@....com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH] arm64: dts: allwinner: a64: sopine-baseboard: Add PHY
 regulator delay

On Sun, Sep 29, 2019 at 10:52:59AM +0200, Jernej Skrabec wrote:
> It turns out that sopine-baseboard needs same fix as pine64-plus
> for ethernet PHY. Here too Realtek ethernet PHY chip needs additional
> power on delay to properly initialize. Datasheet mentions that chip
> needs 30 ms to be properly powered on and that it needs some more time
> to be initialized.
>
> Fix that by adding 100ms ramp delay to regulator responsible for
> powering PHY.
>
> Note that issue was found out and fix tested on pine64-lts, but it's
> basically the same as sopine-baseboard, only layout and connectors
> differ.
>
> Fixes: bdfe4cebea11 ("arm64: allwinner: a64: add Ethernet PHY regulator for several boards")
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>

Applied as a fix for 5.4, thanks!
Maxime

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