linux-kernel - [PATCH 1/3] Documentation: dt-bindings: add the Amlogic Meson Temperature Sensor

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Date:   Tue,  4 Jun 2019 16:47:12 +0200
From:   Guillaume La Roque <glaroque@...libre.com>
To:     jic23@...nel.org, khilman@...libre.com
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] Documentation: dt-bindings: add the Amlogic Meson Temperature Sensor

This adds the devicetree binding documentation for the Temperature
Sensor found in the Amlogic Meson G12 SoCs.
Currently only the G12A SoCs are supported.

Signed-off-by: Guillaume La Roque <glaroque@...libre.com>
---
 .../iio/temperature/amlogic,meson-tsensor.txt | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/temperature/amlogic,meson-tsensor.txt

diff --git a/Documentation/devicetree/bindings/iio/temperature/amlogic,meson-tsensor.txt b/Documentation/devicetree/bindings/iio/temperature/amlogic,meson-tsensor.txt
new file mode 100644
index 000000000000..d064db0e9cac
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/temperature/amlogic,meson-tsensor.txt
@@ -0,0 +1,31 @@
+* Amlogic Meson Temperature Sensor
+
+Required properties:
+- compatible:	depending on the SoC and the position of the sensor,
+		this should be one of:
+		- "amlogic,meson-g12a-cpu-tsensor" for the CPU G12A SoC sensor
+		- "amlogic,meson-g12a-ddr-tsensor" for the DDR G12A SoC sensor
+		followed by the common :
+		- "amlogic,meson-g12a-tsensor" for G12A SoC family
+- reg:		the physical base address and length of the registers
+- interrupts:	the interrupt indicating end of sampling
+- clocks:	phandle identifier for the reference clock of temperature sensor
+- #io-channel-cells: must be 1, see ../iio-bindings.txt
+- amlogic,ao-secure: phandle to the ao-secure syscon
+
+Optional properties:
+- amlogic,critical-temperature: temperature value in milli degrees Celsius
+	to set automatic reboot on too high temperature
+
+Example:
+	cpu_temp: temperature-sensor@...34800 {
+		compatible = "amlogic,meson-g12a-cpu-tsensor",
+			     "amlogic,meson-g12a-tsensor";
+		reg = <0x0 0xff634800 0x0 0x50>;
+		interrupts = <GIC_SPI 35 IRQ_TYPE_EDGE_RISING>;
+		clocks = <&clkc CLKID_TS>;
+		status = "okay";
+		#io-channel-cells = <1>;
+		amlogic,meson-ao-secure = <&sec_AO>;
+		amlogic,critical-temperature = <115000>;
+	};
-- 
2.17.1