Re: [PATCH v13 4/5] ARM: dts: add main Thermal info to rk3288

[Caesar Wang]

Dmitry,

å 2014/10/24 8:46, Dmitry Torokhov åé:
> Hi Caesar,
>
> On Thu, Oct 23, 2014 at 05:40:06PM +0800, Caesar Wang wrote:
> > This patch is depend on rk3288-thermal.dtsi,or
> > it will compile error.
> >
> > If the temperature over a period of time High,over 120C
> > the resulting TSHUT gave CRU module,let it reset
> > the entire chip,or via GPIO give PMIC.
> >
> > Signed-off-by: Caesar Wang <caesar.wang@xxxxxxxxxxxxxx>
> > ---
> >   arch/arm/boot/dts/rk3288.dtsi | 21 +++++++++++++++++++++
> >   1 file changed, 21 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> > index cb18bb4..85fc17a 100644
> > --- a/arch/arm/boot/dts/rk3288.dtsi
> > +++ b/arch/arm/boot/dts/rk3288.dtsi
> > @@ -15,6 +15,7 @@
> >   #include <dt-bindings/interrupt-controller/arm-gic.h>
> >   #include <dt-bindings/pinctrl/rockchip.h>
> >   #include <dt-bindings/clock/rk3288-cru.h>
> > +#include <dt-bindings/thermal/thermal.h>
> >   #include "skeleton.dtsi"
> >   
> >   / {
> > @@ -66,6 +67,7 @@
> >   				 216000  900000
> >   				 126000  900000
> >   			>;
> > +			#cooling-cells = <2>; /* min followed by max */
> >   			clock-latency = <40000>;
> >   			clocks = <&cru ARMCLK>;
> >   		};
> > @@ -346,6 +348,19 @@
> >   		status = "disabled";
> >   	};
> >   
> > +	tsadc: tsadc@ff280000 {
> > +		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";
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&otp_out>;
> > +		#thermal-sensor-cells = <1>;
> > +		hw-shut-temp = <120000>;
> I do not think this is a good value. You have (in the other DTS file)
> passive trip point at 80 and critical (which should result in orderly
> shutdown) at 125. But here you define hardware-controlled shutdown at
> 120C, which is backwards. You should have:
>
> passive <= critical <= hardware
Hmmm....
but, the system will shutdown when temperature over critial value,
there is no chance of triggering the TSHUT.

If the temperature over a period of time High,as we know,
the resulting TSHUT gave CRU module,let it hot-reset the entire chip,
or via GPIO give PMIC cold-reset the entire chip.



> Thanks.

--
Best regards,
Caesar


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