On Wed, Apr 05, 2017 at 11:06:32AM +0200, Quentin Schulz wrote:
> This adds CPU thermal throttling for the Allwinner A33. It uses the
> thermal sensor present in the SoC's GPADC.
>
> Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx>
> ---
>
> v3:
> - switched to new phandle because of modified DT node name for the GPADC
> (named THS),
> - got rid of cooling-min-level and cooling-max-level as it's not used in any
> code in the kernel,
>
> v2:
> - updated cooling-max-level to reflect newly added OPPs,
>
> arch/arm/boot/dts/sun8i-a33.dtsi | 45 ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 45 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
> index 9734e63..b88c107 100644
> --- a/arch/arm/boot/dts/sun8i-a33.dtsi
> +++ b/arch/arm/boot/dts/sun8i-a33.dtsi
> @@ -43,6 +43,7 @@
> */
>
> #include "sun8i-a23-a33.dtsi"
> +#include <dt-bindings/thermal/thermal.h>
>
> / {
> cpu0_opp_table: opp_table0 {
> @@ -127,6 +128,7 @@
> clocks = <&ccu CLK_CPUX>;
> clock-names = "cpu";
> operating-points-v2 = <&cpu0_opp_table>;
> + #cooling-cells = <2>;
> };
>
> cpu@1 {
> @@ -170,6 +172,49 @@
> };
> };
>
> + thermal-zones {
> + cpu_thermal {
> + /* milliseconds */
> + polling-delay-passive = <250>;
> + polling-delay = <1000>;
> + thermal-sensors = <&ths>;
> +
> + cooling-maps {
> + map0 {
> + trip = <&cpu_alert0>;
> + cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> + };
> + map1 {
> + trip = <&cpu_alert1>;
> + cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> + };
> + };
> +
> + trips {
> + cpu_alert0: cpu_alert0 {
> + /* milliCelsius */
> + temperature = <75000>;
> + hysteresis = <2000>;
> + type = "passive";
> + };
> +
> + cpu_alert1: cpu_alert1 {
> + /* milliCelsius */
> + temperature = <90000>;
> + hysteresis = <2000>;
> + type = "hot";
> + };
> +
> + cpu_crit: cpu_crit {
> + /* milliCelsius */
> + temperature = <110000>;
> + hysteresis = <2000>;
> + type = "critical";
> + };
> + };
> + };
> + };
> +
This wasn't sorted properly (thermal is not between mali- and memory
in the alphabetical order). Fixed and applied, thanks!
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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