From mboxrd@z Thu Jan 1 00:00:00 1970 From: zajec5@gmail.com (=?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?=) Date: Mon, 3 Apr 2017 17:48:28 +0200 Subject: [PATCH V5 1/2] dt-bindings: thermal: add support for Broadcom's Northstar thermal In-Reply-To: <20170331201124.656-1-zajec5@gmail.com> References: <20170331201124.656-1-zajec5@gmail.com> Message-ID: <20170403154829.29780-1-zajec5@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Rafa? Mi?ecki 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: Rafa? Mi?ecki --- 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 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 at 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 { + }; + }; +}; -- 2.11.0