Re: [PATCH] arm64: dts: apple: t8112: Add PWM controller

[Hector Martin]

On 09/04/2023 18.18, Sasha Finkelstein via B4 Relay wrote:
> From: Sasha Finkelstein <fnkl.kernel@xxxxxxxxx>
> 
> This patch adds the device tree entries for the PWM controller
> present on M2 macbooks that is connected to the keyboard backlight.
> 
> Signed-off-by: Sasha Finkelstein <fnkl.kernel@xxxxxxxxx>
> ---
>  arch/arm64/boot/dts/apple/t8112-j413.dts | 17 +++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112-j493.dts | 17 +++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112.dtsi     |  9 +++++++++
>  3 files changed, 43 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/t8112-j413.dts b/arch/arm64/boot/dts/apple/t8112-j413.dts
> index 9e758edeaa82..6f69658623bf 100644
> --- a/arch/arm64/boot/dts/apple/t8112-j413.dts
> +++ b/arch/arm64/boot/dts/apple/t8112-j413.dts
> @@ -11,6 +11,7 @@
>  
>  #include "t8112.dtsi"
>  #include "t8112-jxxx.dtsi"
> +#include <dt-bindings/leds/common.h>
>  
>  / {
>  	compatible = "apple,j413", "apple,t8112", "apple,arm-platform";
> @@ -20,6 +21,18 @@ aliases {
>  		bluetooth0 = &bluetooth0;
>  		wifi0 = &wifi0;
>  	};
> +
> +	led-controller {
> +		compatible = "pwm-leds";
> +		led-0 {
> +			pwms = <&fpwm1 0 40000>;
> +			label = "kbd_backlight";
> +			function = LED_FUNCTION_KBD_BACKLIGHT;
> +			color = <LED_COLOR_ID_WHITE>;
> +			max-brightness = <255>;
> +			default-state = "keep";
> +		};
> +	};
>  };
>  
>  /*
> @@ -61,3 +74,7 @@ hpm5: usb-pd@3a {
>  &i2c4 {
>  	status = "okay";
>  };
> +
> +&fpwm1 {
> +	status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/apple/t8112-j493.dts b/arch/arm64/boot/dts/apple/t8112-j493.dts
> index 8552c15be265..0ad908349f55 100644
> --- a/arch/arm64/boot/dts/apple/t8112-j493.dts
> +++ b/arch/arm64/boot/dts/apple/t8112-j493.dts
> @@ -11,6 +11,7 @@
>  
>  #include "t8112.dtsi"
>  #include "t8112-jxxx.dtsi"
> +#include <dt-bindings/leds/common.h>
>  
>  / {
>  	compatible = "apple,j493", "apple,t8112", "apple,arm-platform";
> @@ -20,6 +21,18 @@ aliases {
>  		bluetooth0 = &bluetooth0;
>  		wifi0 = &wifi0;
>  	};
> +
> +	led-controller {
> +		compatible = "pwm-leds";
> +		led-0 {
> +			pwms = <&fpwm1 0 40000>;
> +			label = "kbd_backlight";
> +			function = LED_FUNCTION_KBD_BACKLIGHT;
> +			color = <LED_COLOR_ID_WHITE>;
> +			max-brightness = <255>;
> +			default-state = "keep";
> +		};
> +	};
>  };
>  
>  /*
> @@ -50,3 +63,7 @@ bluetooth0: bluetooth@0,1 {
>  &i2c4 {
>  	status = "okay";
>  };
> +
> +&fpwm1 {
> +	status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/apple/t8112.dtsi b/arch/arm64/boot/dts/apple/t8112.dtsi
> index 698a436e7dac..1666e6ab250b 100644
> --- a/arch/arm64/boot/dts/apple/t8112.dtsi
> +++ b/arch/arm64/boot/dts/apple/t8112.dtsi
> @@ -458,6 +458,15 @@ i2c4: i2c@235020000 {
>  			status = "disabled";
>  		};
>  
> +		fpwm1: pwm@235044000 {
> +			compatible = "apple,t8112-fpwm", "apple,s5l-fpwm";
> +			reg = <0x2 0x35044000 0x0 0x4000>;
> +			power-domains = <&ps_fpwm1>;
> +			clocks = <&clkref>;
> +			#pwm-cells = <2>;
> +			status = "disabled";
> +		};
> +
>  		serial0: serial@235200000 {
>  			compatible = "apple,s5l-uart";
>  			reg = <0x2 0x35200000 0x0 0x1000>;
> 
> ---
> base-commit: 8d59efc33fdaa2c82072b4d3ba5f67d7dd9270d0
> change-id: 20230409-t8112-fpwm-06e434cc358d

Applied to asahi-soc/dt, thanks!

- Hector