Re: [PATCH v2 09/10] arm64: dts: apple: Initial T603[124] (M3 Max and Ultra) device trees
From: Yureka Lilian
Date: Sun Jul 19 2026 - 05:40:42 EST
On 7/15/26 11:11, Janne Grunau wrote:
Contains minimal device trees for all M3 Max and Ultra Apple siliconNit: The indentation is weird here. The parenthesis close is not aligned with the "timer" in the next section.
devices. Those are 14-inch and 16-inch MacBook Pros with M3 Max released
in November 2023 and Mac Studio with M3 Ultra released in 2025.
This does not include M3 Pro since it is separate SoC and not a smaller
variant of the M3 Max contrary to the M1 and M2 generations.
The smaller M3 Max variant (10 performance cores) has its own chip
variant (T6034) but is clearly the same design as T6031. Besides fewer
CPU performance cores and GPU cores it misses also on fourth of the
memory controllers and thus has an aggregated bus width of 384 bit
instead of 512 bit.
Both M3 Ultra variants (28 or 32 CPU cores) are based on T6031 judging
by the advertised memory bandwidth of 819GB/s.
This uses the same multi-die macros as t600x*.dtsi and t602x.dtsi to
support M3 Max and M3 Ultra without duplicating device nodes. Since the
M3 Pro can't use the same .dtsi files "t6031*.dtsi" are used to define
common nodes for T6031, T6032 and T6034.
The device trees have devices nodes for CPU cores, timer, interrupt
controller, power states, watchdog, serial, pin controller, i2c,
PWM based keyboard LED illumination and the boot framebuffer.
Signed-off-by: Janne Grunau <j@xxxxxxxxxx>
---
arch/arm64/boot/dts/apple/Makefile | 5 +
arch/arm64/boot/dts/apple/t6031-base.dtsi | 297 +++
arch/arm64/boot/dts/apple/t6031-die0.dtsi | 197 ++
arch/arm64/boot/dts/apple/t6031-dieX.dtsi | 107 ++
arch/arm64/boot/dts/apple/t6031-gpio-pins.dtsi | 53 +
arch/arm64/boot/dts/apple/t6031-j514c.dts | 18 +
arch/arm64/boot/dts/apple/t6031-j516c.dts | 18 +
arch/arm64/boot/dts/apple/t6031-pmgr.dtsi | 2400 ++++++++++++++++++++++++
arch/arm64/boot/dts/apple/t6031.dtsi | 48 +
arch/arm64/boot/dts/apple/t6032-j575d.dts | 46 +
arch/arm64/boot/dts/apple/t6032.dtsi | 416 ++++
arch/arm64/boot/dts/apple/t6034-j514m.dts | 18 +
arch/arm64/boot/dts/apple/t6034-j516m.dts | 18 +
arch/arm64/boot/dts/apple/t6034.dtsi | 12 +
arch/arm64/boot/dts/apple/t603x-j514-j516.dtsi | 66 +
15 files changed, 3719 insertions(+)
diff --git a/arch/arm64/boot/dts/apple/Makefile b/arch/arm64/boot/dts/apple/Makefile
index 6fc3349a5842..a22b4a8068b6 100644
--- a/arch/arm64/boot/dts/apple/Makefile
+++ b/arch/arm64/boot/dts/apple/Makefile
@@ -87,6 +87,11 @@ dtb-$(CONFIG_ARCH_APPLE) += t6021-j416c.dtb
dtb-$(CONFIG_ARCH_APPLE) += t6020-j474s.dtb
dtb-$(CONFIG_ARCH_APPLE) += t6021-j475c.dtb
dtb-$(CONFIG_ARCH_APPLE) += t6022-j475d.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t6031-j514c.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t6031-j516c.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t6032-j575d.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t6034-j514m.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t6034-j516m.dtb
dtb-$(CONFIG_ARCH_APPLE) += t8112-j413.dtb
dtb-$(CONFIG_ARCH_APPLE) += t8112-j415.dtb
dtb-$(CONFIG_ARCH_APPLE) += t8112-j473.dtb
diff --git a/arch/arm64/boot/dts/apple/t6031-base.dtsi b/arch/arm64/boot/dts/apple/t6031-base.dtsi
new file mode 100644
index 000000000000..0bb7373b3f06
--- /dev/null
+++ b/arch/arm64/boot/dts/apple/t6031-base.dtsi
@@ -0,0 +1,297 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Nodes common for T6031, T6032 and T6034 family SoCs (M3 Max/Ultra)
+ *
+ * Other names: H15J, H15S, "Palma"
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+/ {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ cpus {
+ #address-cells = <2>;
+ #size-cells = <0>;
+
+ cpu-map {
+ cluster0 {
+ core0 {
+ cpu = <&cpu_e00>;
+ };
+ core1 {
+ cpu = <&cpu_e01>;
+ };
+ core2 {
+ cpu = <&cpu_e02>;
+ };
+ core3 {
+ cpu = <&cpu_e03>;
+ };
+ };
+
+ cluster1 {
+ core0 {
+ cpu = <&cpu_p00>;
+ };
+ core1 {
+ cpu = <&cpu_p01>;
+ };
+ core2 {
+ cpu = <&cpu_p02>;
+ };
+ core3 {
+ cpu = <&cpu_p03>;
+ };
+ core4 {
+ cpu = <&cpu_p04>;
+ };
+ core5 {
+ cpu = <&cpu_p05>;
+ };
+ };
+
+ cluster2 {
+ core0 {
+ cpu = <&cpu_p10>;
+ };
+ core1 {
+ cpu = <&cpu_p11>;
+ };
+ core2 {
+ cpu = <&cpu_p12>;
+ };
+ core3 {
+ cpu = <&cpu_p13>;
+ };
+ core4 {
+ cpu = <&cpu_p14>;
+ };
+ core5 {
+ cpu = <&cpu_p15>;
+ };
+ };
+ };
+
+ cpu_e00: cpu@0 {
+ compatible = "apple,sawtooth";
+ device_type = "cpu";
+ reg = <0x0 0x0>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* to be filled by loader */
+ next-level-cache = <&l2_cache_0>;
+ i-cache-size = <0x20000>;
+ d-cache-size = <0x10000>;
+ };
+
+ cpu_e01: cpu@1 {
+ compatible = "apple,sawtooth";
+ device_type = "cpu";
+ reg = <0x0 0x1>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* to be filled by loader */
+ next-level-cache = <&l2_cache_0>;
+ i-cache-size = <0x20000>;
+ d-cache-size = <0x10000>;
+ };
+
+ cpu_e02: cpu@2 {
+ compatible = "apple,sawtooth";
+ device_type = "cpu";
+ reg = <0x0 0x2>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* to be filled by loader */
+ next-level-cache = <&l2_cache_0>;
+ i-cache-size = <0x20000>;
+ d-cache-size = <0x10000>;
+ };
+
+ cpu_e03: cpu@3 {
+ compatible = "apple,sawtooth";
+ device_type = "cpu";
+ reg = <0x0 0x3>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* to be filled by loader */
+ next-level-cache = <&l2_cache_0>;
+ i-cache-size = <0x20000>;
+ d-cache-size = <0x10000>;
+ };
+
+ cpu_p00: cpu@10100 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10100>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_1>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p01: cpu@10101 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10101>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_1>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p02: cpu@10102 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10102>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_1>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p03: cpu@10103 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10103>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_1>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p04: cpu@10104 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10104>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_1>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p05: cpu@10105 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10105>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_1>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p10: cpu@10200 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10200>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_2>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p11: cpu@10201 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10201>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_2>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p12: cpu@10202 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10202>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_2>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p13: cpu@10203 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10203>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_2>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p14: cpu@10204 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10204>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_2>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ cpu_p15: cpu@10205 {
+ compatible = "apple,everest";
+ device_type = "cpu";
+ reg = <0x0 0x10205>;
+ enable-method = "spin-table";
+ cpu-release-addr = <0 0>; /* To be filled by loader */
+ next-level-cache = <&l2_cache_2>;
+ i-cache-size = <0x30000>;
+ d-cache-size = <0x20000>;
+ };
+
+ l2_cache_0: l2-cache-0 {
+ compatible = "cache";
+ cache-level = <2>;
+ cache-unified;
+ cache-size = <0x400000>;
+ };
+
+ l2_cache_1: l2-cache-1 {
+ compatible = "cache";
+ cache-level = <2>;
+ cache-unified;
+ cache-size = <0x1000000>;
+ };
+
+ l2_cache_2: l2-cache-2 {
+ compatible = "cache";
+ cache-level = <2>;
+ cache-unified;
+ cache-size = <0x1000000>;
+ };
+ };
+[...]
+ timer {
+ compatible = "arm,armv8-timer";
+ interrupt-parent = <&aic>;
+ interrupt-names = "phys", "virt", "hyp-phys", "hyp-virt";
+ interrupts = <AIC_FIQ 0 AIC_TMR_GUEST_PHYS IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_FIQ 0 AIC_TMR_GUEST_VIRT IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_FIQ 0 AIC_TMR_HV_PHYS IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_FIQ 0 AIC_TMR_HV_VIRT IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+ clkref: clock-ref {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <24000000>;
+ clock-output-names = "clkref";
+ };
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ };
+};
diff --git a/arch/arm64/boot/dts/apple/t6034.dtsi b/arch/arm64/boot/dts/apple/t6034.dtsi
new file mode 100644
index 000000000000..aa73af9c512d
--- /dev/null
+++ b/arch/arm64/boot/dts/apple/t6034.dtsi
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Apple T6034 "M3 Max" SoC
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+#include "t6031.dtsi"
+
+/ {
+ compatible = "apple,t6034", "apple,arm-platform";
+};
You mentioned the reduced number of memory channels on the 14-core variant, but the corresponding pmgr nodes are not disabled here.
diff --git a/arch/arm64/boot/dts/apple/t603x-j514-j516.dtsi b/arch/arm64/boot/dts/apple/t603x-j514-j516.dtsi
new file mode 100644
index 000000000000..517b84c183ca
--- /dev/null
+++ b/arch/arm64/boot/dts/apple/t603x-j514-j516.dtsi
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * MacBook Pro (14/16-inch, 2023)
+ *
+ * This file contains the parts common to J514 and J516 devices with t6030,
+ * t6031 and t6034.
+ *
+ * target-type: J514s / J514m / J514c / J516s / J516m / J516c
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+/*
+ * These models are essentially identical to the previous generations, other
+ * than the GPIO indices and using SPMI based USB Type-C port controllers.
+ */
+
+#include <dt-bindings/leds/common.h>
+
+/ {
+ chassis-type = "laptop";
+
+ aliases {
+ serial0 = &serial0;
+ };
+
+ chosen {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ stdout-path = "serial0";
+
+ framebuffer0: framebuffer@0 {
+ compatible = "apple,simple-framebuffer", "simple-framebuffer";
+ reg = <0 0 0 0>; /* To be filled by loader */
+ /* Format properties will be added by loader */
+ status = "disabled";
+ power-domains = <&ps_disp_fe>;
+ };
+ };
+
+ memory@10000000000 {
+ device_type = "memory";
+ reg = <0x100 0 0x2 0>; /* To be filled by loader */
+ };
+
+ led-controller {
+ compatible = "pwm-leds";
+ led-0 {
+ pwms = <&fpwm0 0 40000>;
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ max-brightness = <255>;
+ default-state = "keep";
+ };
+ };
+};
+
+&serial0 {
+ status = "okay";
+};
+
+&fpwm0 {
+ status = "okay";
+};
Thanks!
— Yureka