linux-kernel - Re: [PATCH v4 2/4] dt-bindings: document Rockchip thermal

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Date:	Tue, 09 Sep 2014 10:27:17 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Caesar Wang <caesar.wang@...k-chips.com>
Cc:	Heiko Stübner <heiko@...ech.de>,
	edubezval@...il.com, 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,
	huangtao@...k-chips.com, cf@...k-chips.com, dianders@...omium.org,
	dtor@...omium.org, zyw@...k-chips.com, addy.ke@...k-chips.com,
	dmitry.torokhov@...il.com, zhaoyifeng <zyf@...k-chips.com>
Subject: Re: [PATCH v4 2/4] dt-bindings: document Rockchip thermal

On Thu, 2014-09-04 at 09:02 +0800, Caesar Wang wrote:
> 在 2014年09月03日 16:07, Heiko Stübner 写道:
> > Am Mittwoch, 3. September 2014, 10:10:37 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>
> >> ---
> >>   .../devicetree/bindings/thermal/rockchip-thermal.txt | 20
> >> ++++++++++++++++++++ 1 file changed, 20 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..1ed4d4c
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
> >> @@ -0,0 +1,20 @@
> >> +* 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" for the converter-clock, and "apb_pclk" for
> >> +	       the peripheral clock.
> > You're using the passive-temp, critical-temp and force-shut-temp properties in
> > your driver without declaring them here.
> 
> frankly,the about are need be declared. but  there are 4 types[0] for 
> trip in thermal framework,
> there is no force-shut for me. So I want to change it three additional 
> properties in [PATCH V4 4/4],
> 
> 
> [0]
> {
>      THERMAL_TRIP_CRITICAL,
>      THERMAL_TRIP_HOT,
>      THERMAL_TRIP_PASSIVE,
>      THERMAL_TRIP_ACTIVE,
> }
> 
this sounds reasonable to me.

> > But more importantly, please use the generic trip-points for this. I guess it
> > shouldn't be a problem to introduce a "forced-shutdown" trippoint [0] for the
> > additional trip-point you have - thermal maintainers, please shout if I'm
> > wrong :-)
> 
what is the difference between a critical trip point and a
"forced-shutdown" trip point?
Thermal core will do a shutdown in case the critical trip point is
triggered.

thanks,
rui
> It's a good option.
> I can send a patch,but I don't know whether the thermal maintainers will 
> accept it.
> 
> Maybe,they have a better way to suggest it.:-)
> 
> 
> PS:I will sent a new patch If I still have no received their suggestions 
> in two days.
> 
> >
> > Heiko
> >
> >
> > [0] in a separate patch, changing
> > - thermal_trip_type enum in include/linux/thermal.h
> > - trip_types mapping in drivers/thermal/of-thermal.c
> > - Documentation/devicetree/bindings/thermal/thermal.txt
> >
> >> +
> >> +Example:
> >> +tsadc: tsadc@...80000 {
> >> +	compatible = "rockchip,rk3288-tsadc";
> >> +	reg = <0xff280000 0x100>;
> >> +	interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
> >> +	clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
> >> +	clock-names = "tsadc", "apb_pclk";
> >> +};
> >
> >
> >
> 


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