linux-kernel - Re: [PATCH v4 5/8] ARM: dts: Add properties to use pwm-fan device as a cooling device in Odroid U3

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Message-ID: <20150224193711.GA353@developer.amazonguestwifi.org>
Date:	Tue, 24 Feb 2015 15:37:13 -0400
From:	Eduardo Valentin <edubezval@...il.com>
To:	Lukasz Majewski <l.majewski@...sung.com>
Cc:	Kamil Debski <k.debski@...sung.com>,
	Jean Delvare <jdelvare@...e.de>,
	Guenter Roeck <linux@...ck-us.net>,
	Kukjin Kim <kgene@...nel.org>, lm-sensors@...sensors.org,
	Linux PM list <linux-pm@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, devicetree@...r.kernel.org,
	Lukasz Majewski <l.majewski@...ess.pl>,
	Kukjin Kim <kgene.kim@...sung.com>,
	linux-kernel@...r.kernel.org,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Abhilash Kesavan <kesavan.abhilash@...il.com>,
	Abhilash Kesavan <a.kesavan@...sung.com>
Subject: Re: [PATCH v4 5/8] ARM: dts: Add properties to use pwm-fan device as
 a cooling device in Odroid U3

On Wed, Feb 18, 2015 at 11:07:33AM +0100, Lukasz Majewski wrote:
> With those bindings it is possible to use pwm-fan device available in
> Odroid U3 as a cooling device.
> 
> Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
> ---
> Changes for v2:
> - Rename cooling-pwm-values property to cooling-levels
> Changes for v3:
> - Change patch's topic to "ARM dts"
> - Reduce maximal cooling-level to 230 from 255
> Changes for v4:
> - None
> ---
>  arch/arm/boot/dts/exynos4412-odroidu3.dts | 33 ++++++++++++++++++++++++++++++-
>  1 file changed, 32 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/exynos4412-odroidu3.dts b/arch/arm/boot/dts/exynos4412-odroidu3.dts
> index 60bd1e4..3e5df3e 100644
> --- a/arch/arm/boot/dts/exynos4412-odroidu3.dts
> +++ b/arch/arm/boot/dts/exynos4412-odroidu3.dts
> @@ -32,11 +32,42 @@
>  		};
>  	};
>  
> -	pwm-fan {
> +	fan0: pwm-fan {
>  		compatible = "pwm-fan";
>  		pwms = <&pwm 0 10000 0>;
> +		cooling-min-state = <0>;
> +		cooling-max-state = <3>;
> +		#cooling-cells = <2>;
> +		cooling-levels = <0 102 170 230>;
>  		status = "okay";
>  	};
> +
> +	thermal-zones {
> +		cpu_thermal: cpu-thermal {


This thermal zone misses the mandatory properties as per 
 Documentation/devicetree/bindings/thermal/thermal.txt

> +			cooling-maps {
> +				map0 {
> +				     trip = <&cpu_alert1>;
> +				     cooling-device = <&cpu0 7 7>;
> +				};
> +				map1 {
> +				     trip = <&cpu_alert2>;
> +				     cooling-device = <&cpu0 13 13>;
> +				};
> +				map2 {
> +				     trip = <&cpu_alert0>;
> +				     cooling-device = <&fan0 0 1>;
> +				};
> +				map3 {
> +				     trip = <&cpu_alert1>;
> +				     cooling-device = <&fan0 1 2>;
> +				};
> +				map4 {
> +				     trip = <&cpu_alert2>;
> +				     cooling-device = <&fan0 2 3>;
> +				};
> +			};
> +		};
> +	};
>  };
>  
>  &pwm {
> -- 
> 2.0.0.rc2
> 

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