linux-kernel - Re: [PATCH v4 3/3] hwmon: (amc6821) Add cooling device support

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Message-ID: <aec2567b-53e5-40bc-bbc5-0f2a1e9d19e2@roeck-us.net>
Date: Sun, 15 Jun 2025 16:08:37 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: João Paulo Gonçalves <jpaulo.silvagoncalves@...il.com>
Cc: Jean Delvare <jdelvare@...e.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Farouk Bouabid <farouk.bouabid@...rry.de>,
	Quentin Schulz <quentin.schulz@...rry.de>,
	linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	João Paulo Gonçalves <joao.goncalves@...adex.com>
Subject: Re: [PATCH v4 3/3] hwmon: (amc6821) Add cooling device support

On Fri, Jun 13, 2025 at 10:42:40AM -0300, João Paulo Gonçalves wrote:
> From: João Paulo Gonçalves <joao.goncalves@...adex.com>
> 
> Add support for using the AMC6821 as a cooling device. The AMC6821
> registers with the thermal framework only if the `cooling-levels`
> property is present in the fan device tree child node. If this property
> is present, the driver assumes the fan will operate in open-loop, and
> the kernel will control it directly. In this case, the driver will
> change the AMC6821 mode to manual (software DCY) and set the initial PWM
> duty cycle to the maximum fan cooling state level as defined in the DT.
> It is worth mentioning that the cooling device is registered on the
> child fan node, not on the fan controller node. Existing behavior is
> unchanged, so the AMC6821 can still be used without the thermal
> framework (hwmon only).
> 
> Signed-off-by: João Paulo Gonçalves <joao.goncalves@...adex.com>

Applied.

Thanks,
Guenter