[PATCH 1/3] arm64: dts: ten64: add emc2301 fan controller and thermal set points

[Mathew McBride]

Add support for using the on-board EMC2301 fan controller as
a cooling device for the main SoC.

This functionality only became available in the mainline
kernel recently, so the fan controller has been absent from the
mainline DTS copy until now.

The thermal set points are intended for the Ten64
Desktop appliance, it is anticipated that users of the board
in other installations will be able to override these through
their own FDT overlay or by a fixup function in the system firmware.

Signed-off-by: Mathew McBride <matt at traverse.com.au>
---
 .../arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts b/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts
index 71765ec91745..35470c0a928f 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts
@@ -68,6 +68,42 @@ led-2 {
 		};
 	};
 
+	thermal-zones {
+		soc-thermal {
+			trips {
+				fanlow0: fanlow0 {
+					temperature = <60000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+				fanmid0: fanmid0 {
+					temperature = <65000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+				fanmax0: fanmax0 {
+					temperature = <70000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+			};
+			cooling-maps {
+				map2 {
+					trip = <&fanlow0>;
+					cooling-device = <&casefan 0 3>;
+				};
+				map3 {
+					trip = <&fanmid0>;
+					cooling-device = <&casefan 4 7>;
+				};
+				map4 {
+					trip = <&fanmax0>;
+					cooling-device = <&casefan 8 THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+	};
+
 	sfp_xg0: dpmac2-sfp {
 		compatible = "sff,sfp";
 		i2c-bus = <&sfplower_i2c>;
@@ -253,6 +289,20 @@ usbhub: usb-hub at 2d {
 		reg = <0x2d>;
 	};
 
+	fan_controller: emc2301 at 2f {
+		compatible = "microchip,emc2305";
+		reg = <0x2f>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		#pwm-cells = <3>;
+
+		casefan: fan at 0 {
+			reg = <0x0>;
+			pwms = <&fan_controller 26000 0 1>;
+			#cooling-cells = <2>;
+		};
+	};
+
 	uc: board-controller at 7e {
 		compatible = "traverse,ten64-controller";
 		reg = <0x7e>;

-- 
2.51.2