ARM: dts: rockchip: add the thermal main info found on rk3228

This patch adds the thermal needed main information for rk3228 SoCS.

Basically has the following content:

1) TSADC controller:
Add the needed attributes for rk3036 TSADC controller.

Especially for the TSHUT, in some cases if we are unable to shut it down
in orderly fashion (says: kernel is stuck holding a lock or similar), then
hardware TSHUT will reset it.
If the temperature is over 95C over a period of time the thermal shutdown
of the tsadc is invoked with can either reset the entire chip via the CRU,
or notify the PMIC via a GPIO. This should be set in the specific board.

2) Thermal zones:
Add the needed device mode for thermal generic framework.
Detail in Documentation/devicetree/bindings/thermal/thermal.txt.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm/boot/dts/rk3228.dtsi b/arch/arm/boot/dts/rk3228.dtsi
index 4dae42a015098901626416fe707233d3f1872837..f9c34124ccc3477fdd2e7396389c5e02fa839ca6 100644 (file)
--- a/arch/arm/boot/dts/rk3228.dtsi
+++ b/arch/arm/boot/dts/rk3228.dtsi
@@ -43,6 +43,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/clock/rk3228-cru.h>
+#include <dt-bindings/thermal/thermal.h>
 #include "skeleton.dtsi"
 
 / {
@@ -69,6 +70,7 @@
                                /* KHz    uV */
                                 816000 1000000
                        >;
+                       #cooling-cells = <2>; /* min followed by max */
                        clock-latency = <40000>;
                        clocks = <&cru ARMCLK>;
                };
@@ -247,6 +249,63 @@
                assigned-clock-rates = <594000000>;
        };
 
+       thermal-zones {
+               cpu_thermal: cpu-thermal {
+                       polling-delay-passive = <100>; /* milliseconds */
+                       polling-delay = <5000>; /* milliseconds */
+
+                       thermal-sensors = <&tsadc 0>;
+
+                       trips {
+                               cpu_alert0: cpu_alert0 {
+                                       temperature = <70000>; /* millicelsius */
+                                       hysteresis = <2000>; /* millicelsius */
+                                       type = "passive";
+                               };
+                               cpu_alert1: cpu_alert1 {
+                                       temperature = <75000>; /* millicelsius */
+                                       hysteresis = <2000>; /* millicelsius */
+                                       type = "passive";
+                               };
+                               cpu_crit: cpu_crit {
+                                       temperature = <90000>; /* millicelsius */
+                                       hysteresis = <2000>; /* millicelsius */
+                                       type = "critical";
+                               };
+                       };
+
+                       cooling-maps {
+                               map0 {
+                                       trip = <&cpu_alert0>;
+                                       cooling-device =
+                                               <&cpu0 THERMAL_NO_LIMIT 6>;
+                               };
+                               map1 {
+                                       trip = <&cpu_alert1>;
+                                       cooling-device =
+                                               <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+                               };
+                       };
+               };
+       };
+
+       tsadc: tsadc@11150000 {
+               compatible = "rockchip,rk3228-tsadc";
+               reg = <0x11150000 0x100>;
+               interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
+               clock-names = "tsadc", "apb_pclk";
+               resets = <&cru SRST_TSADC>;
+               reset-names = "tsadc-apb";
+               pinctrl-names = "init", "default", "sleep";
+               pinctrl-0 = <&otp_gpio>;
+               pinctrl-1 = <&otp_out>;
+               pinctrl-2 = <&otp_gpio>;
+               #thermal-sensor-cells = <0>;
+               rockchip,hw-tshut-temp = <95000>;
+               status = "disabled";
+       };
+
        emmc: dwmmc@30020000 {
                compatible = "rockchip,rk3288-dw-mshc";
                reg = <0x30020000 0x4000>;
@@ -394,6 +453,16 @@
                        };
                };
 
+               tsadc {
+                       otp_gpio: otp-gpio {
+                               rockchip,pins = <0 24 RK_FUNC_GPIO &pcfg_pull_none>;
+                       };
+
+                       otp_out: otp-out {
+                               rockchip,pins = <0 24 RK_FUNC_2 &pcfg_pull_none>;
+                       };
+               };
+
                uart0 {
                        uart0_xfer: uart0-xfer {
                                rockchip,pins = <2 26 RK_FUNC_1 &pcfg_pull_none>,