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yuyuyurekasvenpeter42
yuyuyureka
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svenpeter42
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arm64: dts: apple: Add minimal t8132 (M4) device trees
Added device trees for the following devices: - apple,j604 - MacBook Pro (14-inch, M4, 2024) - apple,j623 - iMac (24-inch, 2x USB-C, M4, 2024) - apple,j624 - iMac (24-inch, 4x USB-C, M4, 2024) - apple,j713 - MacBook Air (13-inch, M4, 2025) - apple,j715 - MacBook Air (15-inch, M4, 2025) - apple,j773g - Mac mini (M4, 2024) The device trees have a minimal set of devices limited to CPU cores, interrupt controller, power states, watchdog, serial, pin controller, i2c and framebuffer. The device trees for the notebooks add a PWM controller for the keyboard LED illumination. Using the macOS 26.6 iBoot/firmware, the Mac mini reliably boots on a single core using the stock kernel. Booting with smp requires avoiding the wfi and wfit instructions in the idle loop and `delay()` respectively, since those instructions cause a loss of architectural state on the secondary cores, and even then boot is unreliable. Signed-off-by: Yureka Lilian <yureka@cyberchaos.dev> Reviewed-by: Linus Walleij <linusw@kernel.org> Link: https://patch.msgid.link/20260811-apple-m4-initial-devicetrees-v3-9-6bf32d45ad0b@cyberchaos.dev Signed-off-by: Sven Peter <sven@kernel.org>
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‎arch/arm64/boot/dts/apple/Makefile‎

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@@ -103,3 +103,9 @@ dtb-$(CONFIG_ARCH_APPLE) += t8122-j434.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8122-j504.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8122-j613.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8122-j615.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8132-j604.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8132-j623.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8132-j624.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8132-j713.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8132-j715.dtb
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dtb-$(CONFIG_ARCH_APPLE) += t8132-j773g.dtb

‎arch/arm64/boot/dts/apple/t8132-j604.dts‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple MacBook Pro (14-inch, M4, 2024)
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*
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* target-type: J604
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*
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* Copyright The Asahi Linux Contributors
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*/
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/dts-v1/;
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#include "t8132.dtsi"
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#include "t8132-jxxx.dtsi"
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#include <dt-bindings/leds/common.h>
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/ {
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compatible = "apple,j604", "apple,t8132", "apple,arm-platform";
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model = "Apple MacBook Pro (14-inch, M4, 2024)";
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led-controller {
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compatible = "pwm-leds";
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led-0 {
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pwms = <&fpwm1 0 40000>;
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label = "kbd_backlight";
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function = LED_FUNCTION_KBD_BACKLIGHT;
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color = <LED_COLOR_ID_WHITE>;
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max-brightness = <255>;
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default-state = "keep";
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};
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};
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};
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&fpwm1 {
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status = "okay";
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};

‎arch/arm64/boot/dts/apple/t8132-j623.dts‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple iMac (24-inch, 2x USB-C, M4, 2024)
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*
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* target-type: J623
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*
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* Copyright The Asahi Linux Contributors
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*/
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/dts-v1/;
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#include "t8132.dtsi"
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#include "t8132-jxxx.dtsi"
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/ {
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compatible = "apple,j623", "apple,t8132", "apple,arm-platform";
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model = "Apple iMac (24-inch, 2x USB-C, M4, 2024)";
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};

‎arch/arm64/boot/dts/apple/t8132-j624.dts‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple iMac (24-inch, 4x USB-C, M4, 2024)
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*
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* target-type: J624
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*
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* Copyright The Asahi Linux Contributors
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*/
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/dts-v1/;
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#include "t8132.dtsi"
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#include "t8132-jxxx.dtsi"
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/ {
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compatible = "apple,j624", "apple,t8132", "apple,arm-platform";
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model = "Apple iMac (24-inch, 4x USB-C, M4, 2024)";
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};

‎arch/arm64/boot/dts/apple/t8132-j713.dts‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple MacBook Air (13-inch, M4, 2025)
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*
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* target-type: J713
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*
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* Copyright The Asahi Linux Contributors
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*/
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/dts-v1/;
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#include "t8132.dtsi"
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#include "t8132-jxxx.dtsi"
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#include <dt-bindings/leds/common.h>
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/ {
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compatible = "apple,j713", "apple,t8132", "apple,arm-platform";
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model = "Apple MacBook Air (13-inch, M4, 2025)";
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led-controller {
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compatible = "pwm-leds";
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led-0 {
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pwms = <&fpwm1 0 40000>;
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label = "kbd_backlight";
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function = LED_FUNCTION_KBD_BACKLIGHT;
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color = <LED_COLOR_ID_WHITE>;
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max-brightness = <255>;
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default-state = "keep";
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};
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};
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};
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&fpwm1 {
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status = "okay";
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};

‎arch/arm64/boot/dts/apple/t8132-j715.dts‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple MacBook Air (15-inch, M4, 2025)
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*
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* target-type: J715
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*
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* Copyright The Asahi Linux Contributors
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*/
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/dts-v1/;
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#include "t8132.dtsi"
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#include "t8132-jxxx.dtsi"
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#include <dt-bindings/leds/common.h>
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/ {
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compatible = "apple,j715", "apple,t8132", "apple,arm-platform";
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model = "Apple MacBook Air (15-inch, M4, 2025)";
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led-controller {
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compatible = "pwm-leds";
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led-0 {
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pwms = <&fpwm1 0 40000>;
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label = "kbd_backlight";
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function = LED_FUNCTION_KBD_BACKLIGHT;
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color = <LED_COLOR_ID_WHITE>;
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max-brightness = <255>;
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default-state = "keep";
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};
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};
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};
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&fpwm1 {
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status = "okay";
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};

‎arch/arm64/boot/dts/apple/t8132-j773g.dts‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple Mac mini (M4, 2024)
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*
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* target-type: J773g
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*
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* Copyright The Asahi Linux Contributors
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*/
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/dts-v1/;
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#include "t8132.dtsi"
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#include "t8132-jxxx.dtsi"
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/ {
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compatible = "apple,j773g", "apple,t8132", "apple,arm-platform";
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model = "Apple Mac mini (M4, 2024)";
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};
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/*
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* Keep the power-domains used for the HDMI port on.
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*/
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&framebuffer0 {
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power-domains = <&ps_dispext0_fe>, <&ps_dptx_phy>;
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};

‎arch/arm64/boot/dts/apple/t8132-jxxx.dtsi‎

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// SPDX-License-Identifier: GPL-2.0+ OR MIT
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/*
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* Apple M4 Mac mini, MacBook Air/Pro, iMac 24" (M4, 2024/2025)
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*
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* This file contains parts common to all Apple M4 devices using the t8132.
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*
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* target-type: J604, J623, J624, J713, J715, J773g
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*
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* Copyright The Asahi Linux Contributors
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*/
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/ {
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aliases {
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serial0 = &serial0;
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};
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chosen {
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#address-cells = <2>;
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#size-cells = <2>;
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ranges;
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stdout-path = "serial0";
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framebuffer0: framebuffer@0 {
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compatible = "apple,simple-framebuffer", "simple-framebuffer";
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reg = <0 0 0 0>; /* To be filled by loader */
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power-domains = <&ps_disp_fe>, <&ps_dptx_phy>;
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/* Format properties will be added by loader */
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status = "disabled";
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};
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};
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reserved-memory {
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#address-cells = <2>;
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#size-cells = <2>;
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ranges;
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/* To be filled by loader */
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};
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memory@800000000 {
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device_type = "memory";
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reg = <0x8 0 0x2 0>; /* To be filled by loader */
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};
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};
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&serial0 {
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status = "okay";
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};

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