ARM: dts: ux500: Fix up the CPU thermal zone

This fixes up the default ux500 CPU thermal zone:

- Set polling delay to 0 and explain why
- Set passive polling delay to 250
- Remove restrictions from the CPU cooling device,
  we should use all cpufreq steps to cool down if
  needed.

Link: https://lore.kernel.org/r/20191001074628.8122-1-linus.walleij@linaro.org
Fixes: b786a05f6ce4 ("ARM: dts: ux500: Update thermal zone")
Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/boot/dts/ste-dbx5x0.dtsi b/arch/arm/boot/dts/ste-dbx5x0.dtsi
index a53657b..bda454d 100644 (file)
--- a/arch/arm/boot/dts/ste-dbx5x0.dtsi
+++ b/arch/arm/boot/dts/ste-dbx5x0.dtsi
@@ -8,6 +8,7 @@
 #include <dt-bindings/mfd/dbx500-prcmu.h>
 #include <dt-bindings/arm/ux500_pm_domains.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/thermal/thermal.h>
 
 / {
        #address-cells = <1>;
@@ -59,8 +60,12 @@
                 * cooling.
                 */
                cpu_thermal: cpu-thermal {
-                       polling-delay-passive = <0>;
-                       polling-delay = <1000>;
+                       polling-delay-passive = <250>;
+                       /*
+                        * This sensor fires interrupts to update the thermal
+                        * zone, so no polling is needed.
+                        */
+                       polling-delay = <0>;
 
                        thermal-sensors = <&thermal>;
 
@@ -79,7 +84,7 @@
 
                        cooling-maps {
                                trip = <&cpu_alert>;
-                               cooling-device = <&CPU0 0 2>;
+                               cooling-device = <&CPU0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
                                contribution = <100>;
                        };
                };