Adds PWM controller and keyboard backlight bindings for M1 MacBooks

Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Acked-by: Sven Peter <sven@svenpeter.dev>
---
 arch/arm64/boot/dts/apple/t8103-j293.dts | 19 +++++++++++++++++++
 arch/arm64/boot/dts/apple/t8103-j313.dts | 19 +++++++++++++++++++
 arch/arm64/boot/dts/apple/t8103.dtsi     |  9 +++++++++
 3 files changed, 47 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts
index ecb10d237a05..43f79570b458 100644
--- a/arch/arm64/boot/dts/apple/t8103-j293.dts
+++ b/arch/arm64/boot/dts/apple/t8103-j293.dts
@@ -11,6 +11,7 @@
 
 #include "t8103.dtsi"
 #include "t8103-jxxx.dtsi"
+#include <dt-bindings/leds/common.h>
 
 / {
 	compatible = "apple,j293", "apple,t8103", "apple,arm-platform";
@@ -43,3 +44,21 @@ &i2c2 {
 &i2c4 {
 	status = "okay";
 };
+
+/ {
+	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";
+		};
+	};
+};
+
+&fpwm1 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8103-j313.dts b/arch/arm64/boot/dts/apple/t8103-j313.dts
index df741737b8e6..57e75e6ddf63 100644
--- a/arch/arm64/boot/dts/apple/t8103-j313.dts
+++ b/arch/arm64/boot/dts/apple/t8103-j313.dts
@@ -11,6 +11,7 @@
 
 #include "t8103.dtsi"
 #include "t8103-jxxx.dtsi"
+#include <dt-bindings/leds/common.h>
 
 / {
 	compatible = "apple,j313", "apple,t8103", "apple,arm-platform";
@@ -35,3 +36,21 @@ &pcie0_dart_2 {
 
 /delete-node/ &port01;
 /delete-node/ &port02;
+
+/ {
+	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";
+		};
+	};
+};
+
+&fpwm1 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
index 51a63b29d404..ccdb26ef6b22 100644
--- a/arch/arm64/boot/dts/apple/t8103.dtsi
+++ b/arch/arm64/boot/dts/apple/t8103.dtsi
@@ -191,6 +191,15 @@ i2c4: i2c@235020000 {
 			status = "disabled"; /* only used in J293 */
 		};
 
+		fpwm1: pwm@235044000 {
+			compatible = "apple,t8103-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>;
-- 
2.37.1 (Apple Git-137.1)

On 21/12/2022 22:06, Sasha Finkelstein wrote:
> Adds PWM controller and keyboard backlight bindings for M1 MacBooks
> 
> Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
> Acked-by: Sven Peter <sven@svenpeter.dev>
> ---
>  arch/arm64/boot/dts/apple/t8103-j293.dts | 19 +++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8103-j313.dts | 19 +++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8103.dtsi     |  9 +++++++++
>  3 files changed, 47 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts
> index ecb10d237a05..43f79570b458 100644
> --- a/arch/arm64/boot/dts/apple/t8103-j293.dts
> +++ b/arch/arm64/boot/dts/apple/t8103-j293.dts
> @@ -11,6 +11,7 @@
>  
>  #include "t8103.dtsi"
>  #include "t8103-jxxx.dtsi"
> +#include <dt-bindings/leds/common.h>
>  
>  / {
>  	compatible = "apple,j293", "apple,t8103", "apple,arm-platform";
> @@ -43,3 +44,21 @@ &i2c2 {
>  &i2c4 {
>  	status = "okay";
>  };
> +
> +/ {
> +	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";
> +		};
> +	};
> +};
{ goes to the top, not in the middle of DTS. Don't add stuff at the end
of DTS.

Best regards,
Krzysztof