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From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Tue, 1 Mar 2022 23:04:48 +0100
Message-ID: <CACRpkdaks_R11d6+LS7ER6KgS2uupO3xLunH1CxfoMiJtc2qaw@mail.gmail.com>
Subject: Re: [PATCH v2 2/2] ARM: dts: kirkwood: Add Ctera C-200 V1 board
To:     =?UTF-8?Q?Pawe=C5=82_Dembicki?= <paweldembicki@gmail.com>
Cc:     Rob Herring <robh+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
        Olof Johansson <olof@lixom.net>, soc@kernel.org,
        Andrew Lunn <andrew@lunn.ch>,
        Gregory Clement <gregory.clement@bootlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        Shawn Guo <shawnguo@kernel.org>,
        Sam Ravnborg <sam@ravnborg.org>,
        Corentin Labbe <clabbe@baylibre.com>,
        Oleksij Rempel <linux@rempel-privat.de>,
        Hao Fang <fanghao11@huawei.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, linux-kernel@vger.kernel.org,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
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On Tue, Mar 1, 2022 at 9:32 PM Pawe=C5=82 Dembicki <paweldembicki@gmail.com=
> wrote:

> It has a fan controlled by the lm63: PWM controller.

Aha it is one of those combo things, sorry for my ignorance.

>  But the fan blows
> only on disks, board temperature won't change even when PWM =3D 100%.
> It should be controlled by hdd temperature.

We have a way to even monitor the temperature of individual hard disks
these days and I create a thermal zone and use it here to control a fan
in this DTS:
arch/arm/boot/dts/gemini-dlink-dir-685.dts

Yours,
Linus Walleij