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

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Message-ID: <c0f22ea5-b094-d477-e6e4-c509945587e9@linaro.org>
Date:   Wed, 19 Oct 2022 09:24:03 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Anand Moon <linux.amoon@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...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+

Hi,

On 18/10/2022 23:16, Martin Blumenstingl wrote:
> 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.

It seems the fan connector is on page 41 on rev 0.6 and it seems to be the same.

> 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

Neil