linux-kernel - Re: [PATCH 3/3] arm64: dts: rk3399: Add init voltage for vdd

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Message-ID: <88ad7dc9-5299-791b-e285-7775ddf885ba@web.de>
Date:   Tue, 12 Nov 2019 09:44:57 +0100
From:   Sören Moch <smoch@....de>
To:     Markus Reichl <m.reichl@...etechno.de>,
        Kever Yang <kever.yang@...k-chips.com>, heiko@...ech.de
Cc:     Mark Rutland <mark.rutland@....com>,
        Andrius Štikonas <andrius@...konas.eu>,
        linux-kernel@...r.kernel.org, Alexis Ballier <aballier@...too.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        Katsuhiro Suzuki <katsuhiro@...suster.net>,
        Hugh Cole-Baker <sigmaris@...il.com>,
        Elaine Zhang <zhangqing@...k-chips.com>,
        Andy Yan <andyshrk@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Vicente Bergas <vicencb@...il.com>,
        Oskari Lemmela <oskari@...mela.net>,
        linux-rockchip@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Pragnesh Patel <Pragnesh_Patel@...tor.com>,
        Peter Robinson <pbrobinson@...il.com>,
        Nick Xie <nick@...das.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Vivek Unune <npcomplete13@...il.com>,
        Akash Gajjar <akash@...nedev.com>
Subject: Re: [PATCH 3/3] arm64: dts: rk3399: Add init voltage for vdd_log

On 12.11.19 09:16, Markus Reichl wrote:
> Hi Kever,
>
> have a rk3399-roc-pc running mainline U-Boot and kernel and vdd_log is
> showing 1118 mV.
> Is this a danger for the board?
I think yes. What I read vdd_log on rk3399 must not exceed 1.0V.
> How to fix it?
You probably need to do something like [1].

[1] https://patchwork.kernel.org/patch/11173465/

Gruß,
Sören
> Btw. vin-supply for this pwm-regulator is ignored and I could not find it
> in bindings doc.
>
> Gruß,