linux-kernel - Re: [PATCH] arm64: dts: meson: Enable active coling using gpio-fan on Odroid N2/N2+

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Message-ID: <CAFBinCCqXBk9Xq0k=NA3zGi8spwyPQN7dMVWcjE+pXkXYf+FKQ@mail.gmail.com>
Date:   Tue, 18 Oct 2022 23:16:19 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: meson: Enable active coling using gpio-fan on
 Odroid N2/N2+

Hello Anand,

On Tue, Oct 18, 2022 at 9:53 PM Anand Moon <linux.amoon@...il.com> wrote:
>
> Odroid N2/N2+ support active cooling via gpio-fan controller.
> Add fan controls and tip point for cpu and ddr thermal sensor
> on this boards.
In the schematics for board rev 0.6 [0] I cannot find any information
about a fan connector.
The schematics for board rev 0.3 [1] on the other hand document a PWM
based fan connector on page 16.
So now I am not sure whether your patch only applies to certain board
revisions, the schematics are incorrect, etc.

Can you please provide some details about the fan connector on
Odroid-N2/N2+ and which hardware revisions are supported (and which
aren't) by your patch?


Thank you!
Martin


[0] https://dn.odroid.com/S922X/ODROID-N2/Schematic/odroid-n2_rev0.6_20210121.pdf
[1] https://dn.odroid.com/S922X/ODROID-N2/Schematic/odroid-n2_rev0.3_20190117.pdf