linux-kernel - Re: [PATCH] arm64: dts: rockchip: Drop invalid regulator-init-microvolt property

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Message-Id: <87wmz7q1fr.fsf@bloch.sibelius.xs4all.nl>
Date:   Mon, 10 Jul 2023 16:35:36 +0200
From:   Mark Kettenis <mark.kettenis@...all.nl>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     d3adme4t@...il.com, macromorgan@...mail.com, jbx6244@...il.com,
        f.kardame@...jaro.org, amadeus@....edu.cn, robh+dt@...nel.org,
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        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
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        linux-rockchip@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH] arm64: dts: rockchip: Drop invalid regulator-init-microvolt property

> From: Heiko Stuebner <heiko@...ech.de>
> Date: Mon, 10 Jul 2023 16:16:16 +0200
> 
> On Fri, 7 Jul 2023 19:22:17 +0300, Cristian Ciocaltea wrote:
> > The 'regulator-init-microvolt' property is not currently supported by
> > any driver, it was simply carried on from downstream kernels.
> > 
> > The problem is also indicated by the following dtbs_check warning:
> > 
> >   rk3588-rock-5b.dtb: pmic@0: regulators:dcdc-reg4: Unevaluated properties are not allowed ('regulator-init-microvolt' was unexpected)
> > 
> > [...]
> 
> Applied, thanks!
> 
> [1/1] arm64: dts: rockchip: Drop invalid regulator-init-microvolt property
>       commit: 4d08b19629495b29601991d09d07865694c25199

This property *is used* by the drivers in U-Boot.  Dropping this from
the Linux DTBs will likely result in broken boards the next time the
U-Boot DTBs are synched again from Linux.  At least that is what
happened before...

I think the right solution is to add this property to the DT binding
instead.