linux-kernel - Re: [PATCH v4 4/4] mvebu: wrt1900ac: Use pwm-fan rather than gpio-fan

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Date:   Thu, 30 Mar 2017 18:01:53 +0200
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Ralph Sennhauser <ralph.sennhauser@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Imre Kaloz <kaloz@...nwrt.org>, Andrew Lunn <andrew@...n.ch>,
        Alexandre Courbot <gnurou@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        linux-pwm@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 4/4] mvebu: wrt1900ac: Use pwm-fan rather than gpio-fan

Hi Ralph,
 
 On lun., mars 27 2017, Ralph Sennhauser <ralph.sennhauser@...il.com> wrote:

Here again the title should start with ARM: dts: armada-xp.

As for the other patch if there is no need for a v5 I will fix it while
appliig it.

Thanks,

Gregory

> From: Andrew Lunn <andrew@...n.ch>
>
> The mvebu GPIO driver can also perform PWM on some pins. Use the pwm-fan
> driver to control the fan of the WRT1900AC, giving us finer grained control
> over its speed and hence noise.
>
> Signed-off-by: Andrew Lunn <andrew@...n.ch>
> URL: https://patchwork.ozlabs.org/patch/427291/
> [Ralph Sennhauser: drop flags paramter from pwms, no longer used]
> Signed-off-by: Ralph Sennhauser <ralph.sennhauser@...il.com>
> ---
>  arch/arm/boot/dts/armada-xp-linksys-mamba.dts | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/boot/dts/armada-xp-linksys-mamba.dts b/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
> index 9efcf59..6d705f5 100644
> --- a/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
> +++ b/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
> @@ -308,13 +308,11 @@
>  		};
>  	};
>  
> -	gpio_fan {
> +	pwm_fan {
>  		/* SUNON HA4010V4-0000-C99 */
> -		compatible = "gpio-fan";
> -		gpios = <&gpio0 24 0>;
>  
> -		gpio-fan,speed-map = <0    0
> -				      4500 1>;
> +		compatible = "pwm-fan";
> +		pwms = <&gpio0 24 4000>;
>  	};
>  
>  	dsa {
> -- 
> 2.10.2
>

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com