arm64: dts: renesas: r8a774c0: Create thermal zone to support IPA

Setup a thermal zone driven by SoC temperature sensor.
Create passive trip points and bind them to CPUFreq cooling
device that supports power extension.

Based on the work done by Dien Pham <dien.pham.ry@renesas.com>
and others for r8a77990 SoC.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Link: https://lore.kernel.org/r/1568364608-46548-1-git-send-email-biju.das@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/r8a774c0.dtsi b/arch/arm64/boot/dts/renesas/r8a774c0.dtsi
index a1c2de9..764df4c 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a774c0.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a774c0.dtsi
@@ -73,6 +73,7 @@
                        compatible = "arm,cortex-a53";
                        reg = <0>;
                        device_type = "cpu";
+                       #cooling-cells = <2>;
                        power-domains = <&sysc R8A774C0_PD_CA53_CPU0>;
                        next-level-cache = <&L2_CA53>;
                        enable-method = "psci";
@@ -1905,18 +1906,30 @@
        thermal-zones {
                cpu-thermal {
                        polling-delay-passive = <250>;
-                       polling-delay = <1000>;
-                       thermal-sensors = <&thermal>;
+                       polling-delay = <0>;
+                       thermal-sensors = <&thermal 0>;
+                       sustainable-power = <717>;
 
                        cooling-maps {
+                               map0 {
+                                       trip = <&target>;
+                                       cooling-device = <&a53_0 0 2>;
+                                       contribution = <1024>;
+                               };
                        };
 
                        trips {
-                               cpu-crit {
+                               sensor1_crit: sensor1-crit {
                                        temperature = <120000>;
                                        hysteresis = <2000>;
                                        type = "critical";
                                };
+
+                               target: trip-point1 {
+                                       temperature = <100000>;
+                                       hysteresis = <2000>;
+                                       type = "passive";
+                               };
                        };
                };
        };