From: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
To: "Andrius Štikonas" <andrius-4ZmsDwijFH7sq35pWSNszA@public.gmane.org>
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH] arm64: dts: rockchip: Add PWM fan for RockPro64
Date: Thu, 25 Jul 2019 22:12:05 +0200 [thread overview]
Message-ID: <6471342.jnQKebxgib@phil> (raw)
In-Reply-To: <20190724191715.7668-1-andrius-4ZmsDwijFH7sq35pWSNszA@public.gmane.org>
Am Mittwoch, 24. Juli 2019, 21:17:15 CEST schrieb Andrius Štikonas:
> RockPro64 has a dedicated circuit for driving a 12V fan from PWM1.
>
> At the moment this makes fan spin at full speed. fancontrol can be used
> to control fan speed. E.g. the following config file works well:
>
> INTERVAL=10
> DEVPATH=hwmon0=devices/platform/pwm-fan
> DEVNAME=hwmon0=pwmfan
> FCTEMPS=hwmon0/device/pwm1=../thermal/thermal_zone0/temp
> MINTEMP=hwmon0/device/pwm1=40
> MAXTEMP=hwmon0/device/pwm1=60
> MINSTART=hwmon0/device/pwm1=100
> MINSTOP=hwmon0/device/pwm1=70
>
> In the future it would be nice to define trip points in dts file,
> so that kernel could adjust fan speed itself.
patches welcome ;-)
> Signed-off-by: Andrius Štikonas <andrius@stikonas.eu>
applied for 5.4
Thanks
Heiko
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prev parent reply other threads:[~2019-07-25 20:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 19:17 [PATCH] arm64: dts: rockchip: Add PWM fan for RockPro64 Andrius Štikonas
[not found] ` <20190724191715.7668-1-andrius-4ZmsDwijFH7sq35pWSNszA@public.gmane.org>
2019-07-25 20:12 ` Heiko Stuebner [this message]
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