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[V5,1/2] dt-bindings: thermal: add support for Broadcom's Northstar thermal

Message ID 20170403154829.29780-1-zajec5@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rafał Miłecki April 3, 2017, 3:48 p.m. UTC
From: Rafał Miłecki <rafal@milecki.pl>

This commit documents binding for thermal used in Northstar family SoCs.

There isn't any known Northstar device with active cooling system so DT
example has empty cooling-maps node. There is also no support for CPU
frequency throttling so I put only a critical trip in the example.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
V3: Add thermal-zones to the example
V5: Extend example by including trips and cooling-maps. Update commit message
---
 .../devicetree/bindings/thermal/brcm,ns-thermal    | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/brcm,ns-thermal

Comments

Rob Herring (Arm) April 10, 2017, 3 p.m. UTC | #1
On Mon, Apr 03, 2017 at 05:48:28PM +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> This commit documents binding for thermal used in Northstar family SoCs.
> 
> There isn't any known Northstar device with active cooling system so DT
> example has empty cooling-maps node. There is also no support for CPU
> frequency throttling so I put only a critical trip in the example.
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> ---
> V3: Add thermal-zones to the example
> V5: Extend example by including trips and cooling-maps. Update commit message
> ---
>  .../devicetree/bindings/thermal/brcm,ns-thermal    | 37 ++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/brcm,ns-thermal

Acked-by: Rob Herring <robh@kernel.org>
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/thermal/brcm,ns-thermal b/Documentation/devicetree/bindings/thermal/brcm,ns-thermal
new file mode 100644
index 000000000000..68e047170039
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/brcm,ns-thermal
@@ -0,0 +1,37 @@ 
+* Broadcom Northstar Thermal
+
+This binding describes thermal sensor that is part of Northstar's DMU (Device
+Management Unit).
+
+Required properties:
+- compatible : Must be "brcm,ns-thermal"
+- reg : iomem address range of PVTMON registers
+- #thermal-sensor-cells : Should be <0>
+
+Example:
+
+thermal: thermal@1800c2c0 {
+	compatible = "brcm,ns-thermal";
+	reg = <0x1800c2c0 0x10>;
+	#thermal-sensor-cells = <0>;
+};
+
+thermal-zones {
+	cpu_thermal: cpu-thermal {
+		polling-delay-passive = <0>;
+		polling-delay = <1000>;
+		coefficients = <(-556) 418000>;
+		thermal-sensors = <&thermal>;
+
+		trips {
+			cpu-crit {
+				temperature	= <125000>;
+				hysteresis	= <0>;
+				type		= "critical";
+			};
+		};
+
+		cooling-maps {
+		};
+	};
+};