[PATCH v2 6/6] arm64: dts: microchip: lan969x: add fan controller

[Robert Marko]

LAN969x provides a PWM fan output and tachometer input in a register
block separate from the temperature sensor. Describe it as its own
fan-controller node and keep the temperature sensor compatible.

Connect the EV23X71A fan to the controller and route its pins. Use a
25 kHz normal-polarity PWM for the board low-side FET. Set cooling
levels so the fan starts at full speed.

Signed-off-by: Robert Marko <robert.marko@xxxxxxxxxx>
---
Changes in v2:
- Split the fan controller from the temperature node.
- Add the EV23X71A fan child with board-specific PWM and cooling levels.

 arch/arm64/boot/dts/microchip/lan9691.dtsi         | 7 +++++++
 arch/arm64/boot/dts/microchip/lan9696-ev23x71a.dts | 8 +++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/microchip/lan9691.dtsi b/arch/arm64/boot/dts/microchip/lan9691.dtsi
index 52c22dd1a15d5..039c2014aa341 100644
--- a/arch/arm64/boot/dts/microchip/lan9691.dtsi
+++ b/arch/arm64/boot/dts/microchip/lan9691.dtsi
@@ -522,6 +522,13 @@ sgpio_out: gpio@1 {
 			};
 		};
 
+		fanctrl: fan-controller@e2010348 {
+			compatible = "microchip,lan9691-fan";
+			reg = <0xe2010348 0xc>;
+			clocks = <&fx100_clk>;
+			#pwm-cells = <2>;
+		};
+
 		tmon: hwmon@e2020100 {
 			compatible = "microchip,lan9691-temp", "microchip,sparx5-temp";
 			reg = <0xe2020100 0xc>;
diff --git a/arch/arm64/boot/dts/microchip/lan9696-ev23x71a.dts b/arch/arm64/boot/dts/microchip/lan9696-ev23x71a.dts
index abb21a8bace9e..3cbe5beebce1d 100644
--- a/arch/arm64/boot/dts/microchip/lan9696-ev23x71a.dts
+++ b/arch/arm64/boot/dts/microchip/lan9696-ev23x71a.dts
@@ -775,9 +775,15 @@ port29: port@29 {
 	};
 };
 
-&tmon {
+&fanctrl {
 	pinctrl-0 = <&fan_pins>;
 	pinctrl-names = "default";
+
+	fan {
+		pwms = <&fanctrl 40000 0>;
+		cooling-levels = <0 128 192 255>;
+		#cooling-cells = <2>;
+	};
 };
 
 &usart0 {
-- 
2.56.0