[PATCH 8/8] ARM: dts: rockchip: add the thermal main info found on rk3228

Caesar Wang
2016-02-03T04:14:13Z

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>

---

arch/arm/boot/dts/rk3228.dtsi | 69 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)

diff --git a/arch/arm/boot/dts/rk3228.dtsi b/arch/arm/boot/dts/rk3228.dtsi
index 119ff12..afce7fd 100644
--- 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_1 &pcfg_pull_none>;
+ };
+ };
+
uart0 {
uart0_xfer: uart0-xfer {
rockchip,pins = <2 26 RK_FUNC_1 &pcfg_pull_none>,
--
1.9.1