linux-kernel - Re: [PATCH 1/2] dt-bindings: document Rockchip thermal

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Message-ID: <53FCBA06.90701@rock-chips.com>
Date:	Wed, 27 Aug 2014 00:47:02 +0800
From:	Caesar Wang <caesar.wang@...k-chips.com>
To:	Heiko Stübner <heiko@...ech.de>
CC:	rui.zhang@...el.com, rdunlap@...radead.org, cf@...k-chips.com,
	grant.likely@...aro.org, robh+dt@...nel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, zyw@...k-chips.com,
	huangtao@...k-chips.com, xjq@...k-chips.com,
	addy.ke@...k-chips.com, dianders@...omium.org,
	zhaoyifeng <zyf@...k-chips.com>
Subject: Re: [PATCH 1/2] dt-bindings: document Rockchip thermal

Heiko,
在 2014/8/24 7:03, Heiko Stübner 写道:
> Hi Caesar,
>
> Am Samstag, 23. August 2014, 08:15:33 schrieb Caesar Wang:
>> This add the necessary binding documentation for the thermal
>> found on Rockchip SoCs
>>
>> Signed-off-by: zhaoyifeng <zyf@...k-chips.com>
>> Signed-off-by: Caesar Wang <caesar.wang@...k-chips.com>
>> ---
>>   .../bindings/thermal/rockchip-thermal.txt          |   33
>> ++++++++++++++++++++ 1 file changed, 33 insertions(+)
>>   create mode 100644
>> Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>>
>> diff --git a/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>> b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt new file
>> mode 100644
>> index 0000000..b556eae
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>> @@ -0,0 +1,33 @@
>> +* Temperature Sensor ADC (TSADC) on rockchip SoCs
>> +
>> +Required properties:
>> +- compatible : "rockchip,rk3288-tsadc"
>> +- reg : physical base address of the controller and length of memory mapped
>> +  region.
>> +- interrupts : The interrupt number to the cpu. The interrupt specifier
>> format +  depends on the interrupt controller.
>> +- clocks : Must contain an entry for each entry in clock-names.
>> +- clock-names : Shall be "tsadc_clk" for the transfer-clock, and
>> "tsadc_pclk" for +    the peripheral clock.
>> +Optional properties:
>> +- clock-frequency : Thermal sensor's clock frequency.
> see comment in patch2, this should probably use assigned-rate if at all
> necessary (and the assigned-rate is not necessary to document here)
>
>
>> +- pinctrl-names : Should contain only one value - "default".
>> +- pinctrl-0 : Should contain only one value - &tsadc_int.
> in general pinctrl settings are just board-specific settings and do not
> need to be part of the binding documentation.
> And in this case, are you sure that the tsadc uses some pin as interrupt?
> Because in the TRM the TS-ADC interrupt is number 69 of the GIC itself
> and not some pin accessible via pinctrl.
>
>
>> +- passive-temp : Temperature of trip 0.
>> +- critical-temp : Temperature of trip 1.
>> +- force-shut-temp : Temperature of force shut down.
> please use the generic trip-points described in
> Documentation/devicetree/bindings/thermal/thermal.txt
> for this, instead of defining new properties

There are have 4 trip-points mode in thermal.txt.
It's ACTIVE、PASSAIVE、 HOT and  CRITICAL.

Do you have some suggestion for fix it if I need add shut-temp mode ?

- Caesar
>
> Heiko
>
>> +Example:
>> +
>> +tsadc: tsadc@...80000 {
>> +	compatible = "rockchip,rk3288-tsadc";
>> +	reg = <0xff280000 0x100>;
>> +	interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
>> +	clock-frequency = <10000>;
>> +	clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
>> +	clock-names = "tsadc_clk", "tsadc_pclk";
>> +	pinctrl-names = "default";
>> +	pinctrl-1 = <&tsadc_int>;
>> +	passive-temp = <80>;
>> +	critical-temp = <100>;
>> +	force-shut-temp = <120>;
>> +};
>
>
>

-- 
Best regards,
Caesar


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