Re: [PATCH v2 1/1] arm64: dts: qcom: sc7180: Add device node support for TSENS in SC7180

[Doug Anderson]

Hi,

On Thu, Dec 12, 2019 at 3:00 AM Amit Kucheria
<amit.kucheria@xxxxxxxxxxxxx> wrote:
>
> Hi Rajeshwari,
>
> On Thu, Nov 28, 2019 at 3:25 PM Rajeshwari <rkambl@xxxxxxxxxxxxxx> wrote:
> >
> > Add TSENS node and user thermal zone for TSENS sensors in SC7180.
> >
> > Signed-off-by: Rajeshwari <rkambl@xxxxxxxxxxxxxx>
> > ---
> >  arch/arm64/boot/dts/qcom/sc7180.dtsi | 527 +++++++++++++++++++++++++++++++++++
> >  1 file changed, 527 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > index 666e9b9..6656ffc 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > @@ -911,6 +911,26 @@
> >                         status = "disabled";
> >                 };
> >
> > +               tsens0: thermal-sensor@c263000 {
> > +                       compatible = "qcom,sc7180-tsens","qcom,tsens-v2";
> > +                       reg = <0 0x0c263000 0 0x1ff>, /* TM */
> > +                               <0 0x0c222000 0 0x1ff>; /* SROT */
> > +                       #qcom,sensors = <15>;
> > +                       interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>;
> > +                       interrupt-names = "uplow";
> > +                       #thermal-sensor-cells = <1>;
> > +               };
> > +
> > +               tsens1: thermal-sensor@c265000 {
> > +                       compatible = "qcom,sc7180-tsens","qcom,tsens-v2";
> > +                       reg = <0 0x0c265000 0 0x1ff>, /* TM */
> > +                               <0 0x0c223000 0 0x1ff>; /* SROT */
> > +                       #qcom,sensors = <10>;
> > +                       interrupts = <GIC_SPI 507 IRQ_TYPE_LEVEL_HIGH>;
> > +                       interrupt-names = "uplow";
> > +                       #thermal-sensor-cells = <1>;
> > +               };
> > +
> >                 spmi_bus: spmi@c440000 {
> >                         compatible = "qcom,spmi-pmic-arb";
> >                         reg = <0 0x0c440000 0 0x1100>,
> > @@ -1121,6 +1141,513 @@
> >                 };
> >         };
> >
> > +       thermal-zones {
> > +               cpu0-thermal {
> > +                       polling-delay-passive = <250>;
> > +                       polling-delay = <1000>;
> > +
> > +                       thermal-sensors = <&tsens0 1>;
> > +
> > +                       trips {
> > +                               cpu0_alert0: trip-point0 {
> > +                                       temperature = <90000>;
> > +                                       hysteresis = <2000>;
> > +                                       type = "passive";
> > +                               };
> > +
> > +                               cpu0_alert1: trip-point1 {
> > +                                       temperature = <95000>;
> > +                                       hysteresis = <2000>;
> > +                                       type = "passive";
> > +                               };
> > +
> > +                               cpu0_crit: cpu_crit {
> > +                                       temperature = <110000>;
> > +                                       hysteresis = <1000>;
> > +                                       type = "critical";
> > +                               };
>
> Where are the cooling maps for all the cpu thermal zones? A passive
> trip point w/o a cooling map is not of much use. If you are waiting
> for cpufreq support to land before adding them, then remove the
> passive trip points for now and add them along with the cooling maps
> when you have cooling devices.

I will note that cpufreq support has landed in the qcom tree::

https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git/commit/?h=for-next&id=86899d8235ea0d3d7c293404fb43a6fabff866e6

...so I guess the right thing is to send a patch adding the cooling
maps for the cpu thermal zones?

-Doug