linux-kernel - Re: [PATCH v2 3/3] ARM: dts: exynos: Add assigned clock parent to CMU in Exynos5422 Odroid XU3

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Date:   Sun, 6 Sep 2020 15:06:52 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Sylwester Nawrocki <snawrocki@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH v2 3/3] ARM: dts: exynos: Add assigned clock parent to
 CMU in Exynos5422 Odroid XU3

On Fri, Sep 04, 2020 at 12:20:36PM +0200, Sylwester Nawrocki wrote:
> On 9/3/20 20:14, Krzysztof Kozlowski wrote:
> > Commit 78a68acf3d33 ("ARM: dts: exynos: Switch to dedicated Odroid XU3
> > sound card binding") added assigned clocks under sound device node.
> > 
> > However the dtschema expects "clocks" property if "assigned-clocks" are
> > used.  Add reference to input clock, the parent used in
> > "assigned-clock-parents" to silence the dtschema warnings:
> 
> I'm afraid it doesn't improve anything, we just add another violation of
> the DT binding rules as the 'sound' node doesn't represent a real HW and
> shouldn't have 'clocks' property. Instead we could move the assigned-clock*
> properties to the I2S node, as in below patch. I have tested that already 
> on xu3.
> 
> ----------------------------------8<---------------------------
> From f98d2f5ac86d1ae13a77ef481fcbf073a1740f26 Mon Sep 17 00:00:00 2001
> From: Sylwester Nawrocki <s.nawrocki@...sung.com>
> Date: Fri, 4 Sep 2020 12:02:11 +0200
> Subject: [PATCH] ARM: dts: samsung: odroid-xu3: Move assigned-clock*
>  properties to i2s0 node
> 
> The purpose of those assigned-clock-* properties is to configure clock for
> for the I2S device so move them to respective node.
> 
> This suppresses the dtbs_check warning:
> arch/arm/boot/dts/exynos5422-odroidxu3.dt.yaml: sound: 'clocks' is a dependency 
> of 'assigned-clocks'

Thanks, this is a good idea.

Applied.

Best regards,
Krzysztof