arm64: dts: apple: Add J613 board variant of M3 (t8122)

Add a device tree for the Apple MacBook Air (13-inch, M3, 2024)
board variant of the M3 (t8122), known as J613.

It enables and configures the keyboard backlight and internal
HID nodes, as it is a laptop variant which has these devices.

Also add this new device tree to the Makefile, so it is built.

Signed-off-by: Michael Reeves <michael.reeves077@gmail.com>

Author: IntegralPilot

arch/arm64/boot/dts/apple/Makefile

@@ -92,3 +92,4 @@ dtb-$(CONFIG_ARCH_APPLE) += t8112-j415.dtb
 dtb-$(CONFIG_ARCH_APPLE) += t8112-j473.dtb
 dtb-$(CONFIG_ARCH_APPLE) += t8112-j493.dtb
 dtb-$(CONFIG_ARCH_APPLE) += t8122-j504.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t8122-j613.dtb

arch/arm64/boot/dts/apple/t8122-j613.dts

@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Apple MacBook Air (13-inch, M3, 2024)
+ *
+ * target-type: J613
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+/dts-v1/;
+
+#include "t8122.dtsi"
+#include "t8122-jxxx.dtsi"
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "apple,j613", "apple,t8122", "apple,arm-platform";
+	model = "Apple MacBook Air (13-inch, M3, 2024)";
+
+	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";
+		};
+	};
+};
+
+&framebuffer0 {
+	// panel = &panel;
+	power-domains = <&ps_disp_cpu>, <&ps_dptx_ext_phy>;
+};
+
+&fpwm1 {
+	status = "okay";
+};
+
+&mtp {
+	status = "okay";
+};
+
+&mtp_mbox {
+	status = "okay";
+};
+
+&mtp_dart {
+	status = "okay";
+};
+
+&mtp_dockchannel {
+	status = "okay";
+};
+
+&mtp_hid {
+	apple,afe-reset-gpios = <&smc_gpio 8 GPIO_ACTIVE_LOW>;
+	apple,stm-reset-gpios = <&smc_gpio 24 GPIO_ACTIVE_LOW>;
+
+	multi-touch {
+	 	firmware-name = "apple/tpmtfw-j613.bin";
+	};
+
+	keyboard: keyboard {
+		hid-country-code = <0>;
+		apple,keyboard-layout-id = <0>;
+	};
+
+	stm {
+	};
+
+	actuator {
+	};
+
+	tp_accel {
+	};
+};