linux-kernel - Re: [PATCH 11/13] ARM: dts: exynos: Silence SATA PHY warning in Exynos5250 Arndale

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Message-ID: <CAJKOXPd+Mr0c7ype1KTseBc2=qx0NNKKj5Ku0w0HBOgjEsGvKg@mail.gmail.com>
Date:   Tue, 1 Sep 2020 10:17:30 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Kukjin Kim <kgene@...nel.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sylwester Nawrocki <snawrocki@...nel.org>
Subject: Re: [PATCH 11/13] ARM: dts: exynos: Silence SATA PHY warning in
 Exynos5250 Arndale

On Tue, 1 Sep 2020 at 10:13, Marek Szyprowski <m.szyprowski@...sung.com> wrote:
>
> Hi Krzysztof,
>
> On 01.09.2020 09:54, Krzysztof Kozlowski wrote:
> > The SATA PHY in Exynos5250 SoCs has two interfaces and two device nodes:
> > 1. sata-phy@...70000
> > 2. i2c-9/i2c@38
> >
> > The first node represents the actual SATA PHY device with phy-cells.
> > The second represents additional I2C interface, needed by the driver
> > to communicate with the SATA PHY device.  It is not a PHY-provider in
> > the terms of dtschema so rename it to silence dtbs_check warning:
> >
> >    arch/arm/boot/dts/exynos5250-arndale.dt.yaml: sata-phy@38: '#phy-cells' is a required property
> >      From schema: lib/python3.6/site-packages/dtschema/schemas/phy/phy-provider.yaml
> >
> > Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> > ---
> >   arch/arm/boot/dts/exynos5250-arndale.dts | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
> > index f2bcce167b2d..3c401c82905c 100644
> > --- a/arch/arm/boot/dts/exynos5250-arndale.dts
> > +++ b/arch/arm/boot/dts/exynos5250-arndale.dts
> > @@ -544,7 +544,7 @@
> >       samsung,i2c-max-bus-freq = <40000>;
> >       samsung,i2c-slave-addr = <0x38>;
> >
> > -     sata_phy_i2c: sata-phy@38 {
> > +     sata_phy_i2c: sata-phy-i2c@38 {
> >               compatible = "samsung,exynos-sataphy-i2c";
> >               reg = <0x38>;
> >       };
>
> I'm not against the rename, but frankly, the above node and all i2c
> parameters should be moved to exynos5250.dtsi. This is a SoC internal
> things (the same way as hdmiphy in exynos4.dtsi), so the board dts
> should only contain information like status = "enabled" for i2c_8 and
> hdmi_i2c_phy nodes. No need to duplicate it here and in smdk5250.dts.

Good point, the I2C bus used here is an internal part of SoC.

I will squash these two changes into a new one. Thanks for the review!

Best regards,
Krzysztof