[V9,1/4] dt-bindings: fsl: scu: add thermal binding
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Message ID 1550976319-20216-1-git-send-email-Anson.Huang@nxp.com
State New
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  • [V9,1/4] dt-bindings: fsl: scu: add thermal binding
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Commit Message

Anson Huang Feb. 24, 2019, 2:50 a.m. UTC
NXP i.MX8QXP is an ARMv8 SoC with a Cortex-M4 core inside as
system controller, the system controller is in charge of system
power, clock and thermal sensors etc. management, Linux kernel
has to communicate with system controller via MU (message unit)
IPC to get temperature from thermal sensors, this patch adds
binding doc for i.MX system controller thermal driver.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since V8:
	- improve "imx,sensor-resource-id" description to cover single and multiple thermal zones.
---
 .../devicetree/bindings/arm/freescale/fsl,scu.txt   | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

Patch
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diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index 72d481c..2e310ac 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -122,6 +122,21 @@  RTC bindings based on SCU Message Protocol
 Required properties:
 - compatible: should be "fsl,imx8qxp-sc-rtc";
 
+Thermal bindings based on SCU Message Protocol
+------------------------------------------------------------
+
+Required properties:
+- compatible:			Should be :
+				  "fsl,imx8qxp-sc-thermal"
+				followed by "fsl,imx-sc-thermal";
+
+- #thermal-sensor-cells:	See Documentation/devicetree/bindings/thermal/thermal.txt
+				for a description.
+
+- imx,sensor-resource-id: 	A single integer for single thermal zone's resource ID or
+				an array of integers to specify each thermal zone's sensor
+				resource ID.
+
 Example (imx8qxp):
 -------------
 lsio_mu1: mailbox@5d1c0000 {
@@ -168,6 +183,12 @@  firmware {
 		rtc: rtc {
 			compatible = "fsl,imx8qxp-sc-rtc";
 		};
+
+		tsens: thermal-sensor {
+			compatible = "fsl,imx8qxp-sc-thermal", "fsl,imx-sc-thermal";
+			#thermal-sensor-cells = <0>;
+			imx,sensor-resource-id = <IMX_SC_R_SYSTEM>;
+		};
 	};
 };