linux-kernel - Re: [PATCH] arm64: dts: add #cooling-cells to CPU nodes

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Date:   Thu, 11 Jan 2018 18:00:22 -0800
From:   Olof Johansson <olof@...om.net>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Matthias Brugger <matthias.bgg@...il.com>, arm@...nel.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Andrew-sh Cheng <andrew-sh.cheng@...iatek.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        "dawei.chien@...iatek.com" <dawei.chien@...iatek.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: add #cooling-cells to CPU nodes

On Thu, Jan 11, 2018 at 08:38:30AM +0800, Chunfeng Yun wrote:
> On Wed, 2018-01-10 at 22:06 +0100, Arnd Bergmann wrote:
> > dtc complains about the lack of #coolin-cells properties for the
> > CPU nodes that are referred to as "cooling-device":
> > 
> > arch/arm64/boot/dts/mediatek/mt8173-evb.dtb: Warning (cooling_device_property): Missing property '#cooling-cells' in node /cpus/cpu@0 or bad phandle (referred from /thermal-zones/cpu_thermal/cooling-maps/map@0:cooling-device[0])
> > arch/arm64/boot/dts/mediatek/mt8173-evb.dtb: Warning (cooling_device_property): Missing property '#cooling-cells' in node /cpus/cpu@100 or bad phandle (referred from /thermal-zones/cpu_thermal/cooling-maps/map@1:cooling-device[0])
> > 
> > Apparently this property must be '<2>' to match the binding.
> > 
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> > ---
> > If this looks ok, I'd apply it directly to the fixes branch
> > for 4.15, as the warning is one that was introduced in this
> > release.

Actually, it's in next/dt (or at least this patch doesn't apply as it is to
fixes), so I've added it there.


-Olof