Re: [PATCH V15 RESEND 5/5] arm64: dts: imx: add i.MX8QXP thermal support

Daniel Lezcano
2020-02-21T13:04:57Z

On Thu, Feb 20, 2020 at 09:10:28AM +0800, Anson Huang wrote:
> Add i.MX8QXP CPU thermal zone support.
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
> No change.
> ---
> arch/arm64/boot/dts/freescale/imx8qxp.dtsi | 36 ++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> index fb5f752..0a14fe4 100644
> --- a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> @@ -11,6 +11,7 @@
> #include <dt-bindings/input/input.h>
> #include <dt-bindings/interrupt-controller/arm-gic.h>
> #include <dt-bindings/pinctrl/pads-imx8qxp.h>
> +#include <dt-bindings/thermal/thermal.h>
>
> / {
> interrupt-parent = <&gic>;
> @@ -189,6 +190,11 @@
> compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
> timeout-sec = <60>;
> };
> +
> + tsens: thermal-sensor {
> + compatible = "fsl,imx8qxp-sc-thermal", "fsl,imx-sc-thermal";
> + #thermal-sensor-cells = <1>;
> + };
> };
>
> timer {
> @@ -586,4 +592,34 @@
> #clock-cells = <1>;
> };
> };
> +
> + thermal_zones: thermal-zones {
> + cpu-thermal0 {
> + polling-delay-passive = <250>;
> + polling-delay = <2000>;
> + thermal-sensors = <&tsens IMX_SC_R_SYSTEM>;
> + trips {
> + cpu_alert0: trip0 {
> + temperature = <107000>;
> + hysteresis = <2000>;
> + type = "passive";
> + };

May be you can add a 'hot' trip point before 'critical' for future use before
reaching the emergency shutdown.

> + cpu_crit0: trip1 {
> + temperature = <127000>;
> + hysteresis = <2000>;
> + type = "critical";
> + };
> + };
> + cooling-maps {
> + map0 {
> + trip = <&cpu_alert0>;
> + cooling-device =
> + <&A35_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&A35_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&A35_2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&A35_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> + };
> + };
> + };
> + };
> };
> --
> 2.7.4
>

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