From b48241dd02fd4b240696134540ebbc406875df5c Mon Sep 17 00:00:00 2001 From: Erik Bourget Date: Sat, 24 Oct 2026 18:21:23 -0400 Subject: [PATCH 1/5] dt-bindings: soc: apple: apple,t6041-aop: Add T8132 The T8132 (M4) AOP runs the same firmware transport as the T6041 one, and its bootloader hands it over the same way. It also programs the AOP DART's address filter (DAPF) and reserves the filter's windows, which the firmware reaches through its DART at their physical addresses. The windows come in memory-region with the firmware segments, up to 16 of them. Signed-off-by: Erik Bourget --- .../bindings/soc/apple/apple,t6041-aop.yaml | 29 +++++++++++++++---- 1 file changed, 23 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/soc/apple/apple,t6041-aop.yaml b/Documentation/devicetree/bindings/soc/apple/apple,t6041-aop.yaml index e8a2df805059a..8e940d46e6d67 100644 --- a/Documentation/devicetree/bindings/soc/apple/apple,t6041-aop.yaml +++ b/Documentation/devicetree/bindings/soc/apple/apple,t6041-aop.yaml @@ -4,7 +4,7 @@ $id: http://devicetree.org/schemas/soc/apple/apple,t6041-aop.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# -title: Apple T604x Always-On Processor +title: Apple T604x and T8132 Always-On Processor maintainers: - Jonathan Goyvaerts @@ -16,9 +16,15 @@ description: reaches its services through the RTKit endpoints. The firmware's external code and log segments live in DRAM, and the bootloader reserves them. + On T8132 the bootloader also programs the AOP DART's address filter (DAPF) + and reserves its windows, which the firmware reaches through its DART at + their physical addresses. + properties: compatible: - const: apple,t6041-aop + enum: + - apple,t6041-aop + - apple,t8132-aop reg: minItems: 2 @@ -47,11 +53,12 @@ properties: memory-region: minItems: 1 - maxItems: 4 + maxItems: 18 description: - The firmware segments in DRAM (its external code and its log), filled in - by the bootloader from the ADT. The iommu-addresses property of each - region gives the address the firmware uses for it. + The firmware segments in DRAM (its external code and its log) and, on + T8132, the DAPF windows, filled in by the bootloader from the ADT. The + iommu-addresses property of each region gives the address the firmware + uses for it. audio: type: object @@ -93,6 +100,16 @@ required: - mbox-names - iommus +allOf: + - if: + properties: + compatible: + const: apple,t6041-aop + then: + properties: + memory-region: + maxItems: 4 + additionalProperties: false examples: From d58ef312ef559765e72dc03f8ff21cd20ee3940b Mon Sep 17 00:00:00 2001 From: Erik Bourget Date: Sat, 24 Oct 2026 18:21:42 -0400 Subject: [PATCH 2/5] ASoC: dt-bindings: apple,t6041-aop-audio: Add T8132 The T8132 AOP audio service is the T6041 one: the same LPAI microphone flow, and the same ADMAC channel map for the speakers and the jack. Allow "apple,t8132-aop-audio" in front of the T6041 compatible. A machine brought up in steps lists only the streams it has so far, so allow the microphones alone, and the microphones with the jack, besides the speaker layouts. Signed-off-by: Erik Bourget --- .../bindings/sound/apple,t6041-aop-audio.yaml | 61 ++++++++++++------- 1 file changed, 40 insertions(+), 21 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/apple,t6041-aop-audio.yaml b/Documentation/devicetree/bindings/sound/apple,t6041-aop-audio.yaml index 1eadf9ff3b6eb..85e9aca39bf7f 100644 --- a/Documentation/devicetree/bindings/sound/apple,t6041-aop-audio.yaml +++ b/Documentation/devicetree/bindings/sound/apple,t6041-aop-audio.yaml @@ -4,21 +4,21 @@ $id: http://devicetree.org/schemas/sound/apple,t6041-aop-audio.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# -title: Apple T6041 AOP audio +title: Apple T6041 and T8132 AOP audio maintainers: - Jonathan Goyvaerts description: | - The Always-On Processor on Apple T6041 SoCs runs the machine's audio + The Always-On Processor on Apple T6041 and T8132 SoCs runs the machine's audio streams in its firmware: the microphone array, the internal speakers with their voltage and current sense, and the 3.5 mm headset jack in both directions. This node is a child of the AOP node and names the ADMAC channels the host moves each stream's data over while the firmware runs its serializer. The parent AOP binding describes the firmware transport. - The headset jack's channels are optional: a node without them has no jack - streams. + The speaker and headset jack channels are optional: a node without them has + no speaker or jack streams. # Only select T6041 nodes: other AOP audio nodes carry the # apple,t6030-aop-audio fallback too and have a different set of streams. @@ -35,27 +35,46 @@ allOf: properties: compatible: - items: - - const: apple,t6041-aop-audio - - const: apple,t6030-aop-audio + oneOf: + - items: + - const: apple,t6041-aop-audio + - const: apple,t6030-aop-audio + - items: + - const: apple,t8132-aop-audio + - const: apple,t6041-aop-audio + - const: apple,t6030-aop-audio dmas: - minItems: 3 - items: - - description: Microphone array input - - description: Internal speaker output - - description: Speaker voltage and current sense input - - description: Headset jack output - - description: Headset microphone input + description: + The ADMAC channels named in dma-names, in that order. "dma" is the + microphone array input, "spkr" the internal speaker output, "sense" the + speakers' voltage and current sense input, "cout" the headset jack output + and "cin" the headset microphone input. + minItems: 1 + maxItems: 5 dma-names: - minItems: 3 - items: - - const: dma - - const: spkr - - const: sense - - const: cout - - const: cin + oneOf: + - description: The microphones only + items: + - const: dma + - description: The microphones and the headset jack + items: + - const: dma + - const: cout + - const: cin + - description: The microphones and the speakers + items: + - const: dma + - const: spkr + - const: sense + - description: The microphones, the speakers and the headset jack + items: + - const: dma + - const: spkr + - const: sense + - const: cout + - const: cin "#sound-dai-cells": const: 1 From f297b2d6599d3e858ca150ee94a2a4e873245c75 Mon Sep 17 00:00:00 2001 From: Erik Bourget Date: Sat, 24 Oct 2026 22:14:24 -0400 Subject: [PATCH 3/5] soc: apple: aop: Add T8132 The T8132 (M4) AOP takes the T6040 boot arguments (EC0p 0x100_0000_0000, nCal 0, alig 64, AOPt 0): iBoot leaves the boot-argument table at its defaults in the AOP SRAM and the AOP halted, and the ADT gives __ETEXT the DART address 0x100_0000_0000. The bootloader programs the AOP DART's DAPF and reserves the firmware segments and the DAPF windows, so the T6040 configuration applies unchanged. Tested on J713 (MacBook Air 13" M4) with m1n1 handing the AOP over (its memory-region holds __ETEXT, __OS_LOG and the 15 DAPF windows): the AOP starts, and the microphones capture (3 channels, 48 kHz) through aop_audio. Signed-off-by: Erik Bourget --- drivers/soc/apple/aop.rs | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/soc/apple/aop.rs b/drivers/soc/apple/aop.rs index e72f025bb3459..e220fffc195db 100644 --- a/drivers/soc/apple/aop.rs +++ b/drivers/soc/apple/aop.rs @@ -2519,6 +2519,10 @@ const HW_CFG_T6040: AopHwConfig = AopHwConfig { fw_regions: true, halt_on_failed_start: true, }; +/// T8132 (J713): as T6040. The bootloader hands the AOP over the same way, with +/// the DART's DAPF programmed and its windows reserved alongside the firmware +/// segments. +const HW_CFG_T8132: AopHwConfig = HW_CFG_T6040; /// T8140: the firmware is started with the boot arguments the bootloader /// left, boots through the setup port and speaks EPIC version 4. Of the /// advertised AFK endpoints, the application map is 0x20 misc, 0x21 @@ -2547,6 +2551,7 @@ kernel::of_device_table!( (of::DeviceId::new(c_str!("apple,t6020-aop")), &HW_CFG_T6020), (of::DeviceId::new(c_str!("apple,t8140-aop")), &HW_CFG_T8140), (of::DeviceId::new(c_str!("apple,t6041-aop")), &HW_CFG_T6040), + (of::DeviceId::new(c_str!("apple,t8132-aop")), &HW_CFG_T8132), ] ); From 93e4dad9882b515b5fdd70277f1fc769d7f10b1f Mon Sep 17 00:00:00 2001 From: Erik Bourget Date: Sat, 24 Oct 2026 18:22:45 -0400 Subject: [PATCH 4/5] arm64: dts: apple: t8132: Add the AOP and the audio ADMACs Describe the T8132 AOP with its mailbox and DART, and the audio fabric's two ADMACs (admac-leap-ns on DART stream 10, admac-base-ns on stream 8), all disabled. Addresses and interrupts are the ADT's; the ADMAC channel map is the T6041 one: the microphones on LEAP channel 1. Signed-off-by: Erik Bourget --- arch/arm64/boot/dts/apple/t8132.dtsi | 78 ++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/arch/arm64/boot/dts/apple/t8132.dtsi b/arch/arm64/boot/dts/apple/t8132.dtsi index c82816625efd0..77dccc298914d 100644 --- a/arch/arm64/boot/dts/apple/t8132.dtsi +++ b/arch/arm64/boot/dts/apple/t8132.dtsi @@ -825,6 +825,84 @@ /* Shared controller resources; board files select the qualified devices. */ &soc { + /* + * AOP (always-on processor). iBoot loads its RTKit firmware and leaves + * it halted; Linux starts it. + */ + aop: aop@390600000 { + compatible = "apple,t8132-aop"; + reg = <0x3 0x90c00000 0x0 0x1e0000>, + <0x3 0x90600000 0x0 0x88000>, + <0x3 0x90050000 0x0 0x4000>, + <0x3 0x882a8000 0x0 0x8>; + reg-names = "firmware", "asc", "asc-aux", "config"; + mboxes = <&aop_mbox>; + mbox-names = "mbox"; + iommus = <&aop_dart 0>; + status = "disabled"; + + /* + * "dma" is the microphones' LEAP ADMAC channel (ADT audio-hp); + * the speaker and jack channels follow the T6041 map. + */ + aop_audio: audio { + compatible = "apple,t8132-aop-audio", "apple,t6041-aop-audio", + "apple,t6030-aop-audio"; + dmas = <&admac0 1>; + dma-names = "dma"; + #sound-dai-cells = <1>; + }; + }; + + /* ADT lists the interrupts as 1, 0, 3, 2 of the block: send-empty is the lowest. */ + aop_mbox: mailbox@390608000 { + compatible = "apple,t8132-asc-mailbox", "apple,asc-mailbox-v4"; + reg = <0x3 0x90608000 0x0 0x4000>; + interrupt-parent = <&aic>; + interrupts = , + , + , + ; + interrupt-names = "send-empty", "send-not-empty", + "recv-empty", "recv-not-empty"; + #mbox-cells = <0>; + status = "disabled"; + }; + + aop_dart: iommu@390f00000 { + compatible = "apple,t8132-dart", "apple,t8110-dart"; + reg = <0x3 0x90f00000 0x0 0xc000>; + #iommu-cells = <1>; + interrupt-parent = <&aic>; + interrupts = ; + status = "disabled"; + }; + + /* The audio fabric's ADMACs: admac-leap-ns (DART stream 10) and admac-base-ns (stream 8) */ + admac0: dma-controller@393300000 { + compatible = "apple,t8132-admac"; + reg = <0x3 0x93300000 0x0 0x34000>; + #dma-cells = <1>; + dma-channels = <9>; + /* the ADT gives the first of the four outputs */ + interrupts-extended = <&aic AIC_IRQ 478 IRQ_TYPE_LEVEL_HIGH>, + <0>, <0>, <0>; + iommus = <&aop_dart 10>; + status = "disabled"; + }; + + admac1: dma-controller@393800000 { + compatible = "apple,t8132-admac"; + reg = <0x3 0x93800000 0x0 0x34000>; + #dma-cells = <1>; + dma-channels = <13>; + /* the ADT gives the first of the four outputs */ + interrupts-extended = <&aic AIC_IRQ 475 IRQ_TYPE_LEVEL_HIGH>, + <0>, <0>, <0>; + iommus = <&aop_dart 8>; + status = "disabled"; + }; + nub_spmi_a0: spmi@388908000 { status = "disabled"; compatible = "apple,t8132-spmi", "apple,t8103-spmi"; From 890e6a96f3b1441243e7dc07ba1f69ea5fc3caa9 Mon Sep 17 00:00:00 2001 From: Erik Bourget Date: Sat, 24 Oct 2026 18:22:45 -0400 Subject: [PATCH 5/5] arm64: dts: apple: t8132-j713: Enable the AOP and the microphones Enable the AOP, its DART and mailbox, and the ADMACs on the MacBook Air 13" M4, with the AOP audio service for the three microphones. /chosen already asks for the AOP's handoff: m1n1 programs the AOP DART's DAPF and adds the firmware segments and the DAPF windows to the AOP's memory-region, or disables the AOP. Signed-off-by: Erik Bourget --- arch/arm64/boot/dts/apple/t8132-j713.dts | 30 ++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/arch/arm64/boot/dts/apple/t8132-j713.dts b/arch/arm64/boot/dts/apple/t8132-j713.dts index d878b72fd39ba..56b7285fcf518 100644 --- a/arch/arm64/boot/dts/apple/t8132-j713.dts +++ b/arch/arm64/boot/dts/apple/t8132-j713.dts @@ -56,6 +56,36 @@ }; }; +/* + * m1n1 programs the AOP DART's DAPF and reserves the firmware segments and + * the DAPF windows in memory-region when /chosen asks for the AOP's handoff, + * or disables the AOP. + */ +&aop { + status = "okay"; +}; + +&aop_audio { + apple,chassis-name = "J713"; + apple,machine-kind = "MacBook Air"; +}; + +&aop_dart { + status = "okay"; +}; + +&aop_mbox { + status = "okay"; +}; + +&admac0 { + status = "okay"; +}; + +&admac1 { + status = "okay"; +}; + /* Enable DVFS only with the J713 board thermal owner. */ &cpufreq_e { status = "okay";