Re: [PATCH 10/10] arm64: dts: apple: Add minimal t8132 (M4) device trees
From: Sven Peter
Date: Tue Jul 14 2026 - 16:00:43 EST
On 7/5/26 15:17, Yureka Lilian wrote:
Added device trees for the following devices:Please put these at the correct position in the Makefile and not at the very top.
- 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 26.6b3 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@xxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/apple/Makefile | 6 +
arch/arm64/boot/dts/apple/t8132-j604.dts | 35 +
arch/arm64/boot/dts/apple/t8132-j623.dts | 18 +
arch/arm64/boot/dts/apple/t8132-j624.dts | 18 +
arch/arm64/boot/dts/apple/t8132-j713.dts | 35 +
arch/arm64/boot/dts/apple/t8132-j715.dts | 35 +
arch/arm64/boot/dts/apple/t8132-j773g.dts | 25 +
arch/arm64/boot/dts/apple/t8132-jxxx.dtsi | 48 ++
arch/arm64/boot/dts/apple/t8132-pmgr.dtsi | 1125 +++++++++++++++++++++++++++++
arch/arm64/boot/dts/apple/t8132.dtsi | 440 +++++++++++
10 files changed, 1785 insertions(+)
diff --git a/arch/arm64/boot/dts/apple/Makefile b/arch/arm64/boot/dts/apple/Makefile
index 6fc3349a5842..181bd0e28965 100644
--- a/arch/arm64/boot/dts/apple/Makefile
+++ b/arch/arm64/boot/dts/apple/Makefile
@@ -1,4 +1,10 @@
# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_APPLE) += t8132-j604.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t8132-j623.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t8132-j624.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t8132-j713.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t8132-j715.dtb
+dtb-$(CONFIG_ARCH_APPLE) += t8132-j773g.dtb
dtb-$(CONFIG_ARCH_APPLE) += s5l8960x-j71.dtb
dtb-$(CONFIG_ARCH_APPLE) += s5l8960x-j73.dtb
dtb-$(CONFIG_ARCH_APPLE) += s5l8960x-j85m.dtb
diff --git a/arch/arm64/boot/dts/apple/t8132-j604.dts b/arch/arm64/boot/dts/apple/t8132-j604.dts
new file mode 100644
index 000000000000..c4be915cb33a
--- /dev/null
+++ b/arch/arm64/boot/dts/apple/t8132-j604.dts
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Apple MacBook Pro (14-inch, M4, 2024)
+ *
+ * target-type: J604
+ *
[...]
+
+ pmgr: power-management@380700000 {
+ compatible = "apple,t8132-pmgr", "apple,t8103-pmgr", "syscon", "simple-mfd";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x3 0x80700000 0 0x14000>;
+ /* child nodes are added in t8132-pmgr.dtsi */
+ };
+
+ aic: interrupt-controller@381180000 {
+ compatible = "apple,t8132-aic3", "apple,t8122-aic3";
+ #interrupt-cells = <3>;
+ interrupt-controller;
+ reg = <0x00000003 0x81000000 0x00000000 0x1cc000>,
You have 381180000 in the node name but 381000000 here, I guess the node name is a copy paste error. W=1 flags this fwiw.
Sven