linux-kernel - [PATCH 1/5 v2] thermal: rcar_gen3_thermal: Document the R-Car Gen3

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Date:   Sat, 3 Sep 2016 05:24:27 +0000
From:   Khiem Nguyen <khiem.nguyen.xt@...esas.com>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
CC:     Wolfram Sang <wsa@...-dreams.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <damm+renesas@...nsource.se>,
        "Zhang Rui" <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Thao Phuong Le. Nguyen" <thao.nguyen.yb@....renesas.com>,
        Hien Dang <hien.dang.eb@...esas.com>,
        Toru Oishi <toru.oishi.zj@...esas.com>,
        "Khiem Nguyen" <khiem.nguyen.xt@...esas.com>
Subject: [PATCH 1/5 v2] thermal: rcar_gen3_thermal: Document the R-Car Gen3


Signed-off-by: Hien Dang <hien.dang.eb@...esas.com>
Signed-off-by: Khiem Nguyen <khiem.nguyen.xt@...esas.com>
---

v2:
 * Update the format of compatible string.
 * Add explanation for keyword tsc.
 
 .../bindings/thermal/rcar-gen3-thermal.txt         | 79 ++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt

diff --git a/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt
new file mode 100644
index 0000000..163f794
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt
@@ -0,0 +1,79 @@
+* DT bindings for Renesas R-Car Gen3 Thermal Sensor driver
+
+On R-Car Gen3 SoCs, the thermal sensor controllers (TSC) control the thermal sensors (THS)
+which are the analog circuits for measuring temperature (Tj) inside the LSI.
+
+Required properties:
+- compatible		: "renesas,<soctype>-thermal",
+			  Examples with soctypes are:
+			    - "renesas,r8a7795-thermal" (R-Car H3)
+			    - "renesas,r8a7796-thermal" (R-Car M3)
+- reg			: Address range of the thermal registers.
+- clocks		: Must contain a reference to the functional clock.
+- #thermal-sensor-cells : Please see ./thermal.txt
+
+Option properties:
+
+- interrupts		: Use interrupt
+- power-domain		: Must contain a reference to the power domain. This property is
+			  mandatory if the thermal sensor instance is part of a controllable power
+			  domain.
+
+Example (non interrupt support):
+
+	tsc1: thermal@...98000 {
+		compatible = "renesas,r8a7795-thermal";
+		reg = <0 0xe6198000 0 0x5c>;
+		clocks = <&cpg CPG_MOD 522>;
+		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+		#thermal-sensor-cells = <0>;
+		status = "okay";
+	};
+
+	thermal-zones {
+		sensor_thermal1: sensor-thermal1 {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+
+			/* sensor ID */
+			thermal-sensors = <&tsc1>;
+
+			trips {
+				sensor1_crit: sensor1-crit {
+					temperature = <90000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
+Example (interrupt support):
+
+	tsc1: thermal@...98000 {
+		compatible = "renesas,r8a7795-thermal";
+		reg = <0 0xe6198000 0 0x5c>;
+		interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cpg CPG_MOD 522>;
+		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+		#thermal-sensor-cells = <0>;
+		status = "okay";
+	};
+
+	thermal-zones {
+		sensor_thermal1: sensor-thermal1 {
+			polling-delay-passive = <250>;
+			polling-delay = <0>;
+
+			/* sensor ID */
+			thermal-sensors = <&tsc1>;
+
+			trips {
+				sensor1_crit: sensor1-crit {
+					temperature = <90000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+		};
+	};
-- 
1.9.1