WIP: Implement DCP 14.7 ABI

Documentation/admin-guide/kernel-parameters.txt

@@ -2250,6 +2250,29 @@ Kernel parameters
 
 			idle=nomwait: Disable mwait for CPU C-states
 
+			[ARM64,EARLY]
+			Format: idle=wfi, idle=yield, idle=nop
+
+			idle=wfi: Use the WFI (Wait For Interrupt) hint
+			instruction in the idle loop. This is the default and
+			allows the CPU to enter a low-power state until an
+			interrupt arrives.
+
+			idle=yield: Use the YIELD hint instruction instead of
+			WFI. CPUs supporting simultaneous multi-threading (SMT),
+			can continue executing another thread when the current
+			thread reaches the idle loop. This will make the CPUs
+			eat more power, but may be useful to get slightly better
+			performance in some applications, since the CPUs will
+			not enter a low-power state.
+
+			idle=nop: Do not execute any idle instruction in the
+			idle loop. This is useful on platforms where WFI
+			misbehaves, leading to system instability or loss of CPU
+			state. This will make the CPUs eat more power, but may
+			give slightly better performance in some applications,
+			since the CPUs will not enter a low-power state.
+
 	idxd.sva=	[HW]
 			Format: <bool>
 			Allow force disabling of Shared Virtual Memory (SVA)

Documentation/devicetree/bindings/arm/apple.yaml

@@ -96,6 +96,13 @@ description: |
   - MacBook Pro (13-inch, M2, 2022)
   - Mac mini (M2, 2023)
 
+  Devices based on the "M3" SoC:
+
+  - MacBook Air (13-inch, M3, 2024)
+  - MacBook Air (15-inch, M3, 2024)
+  - MacBook Pro (14-inch, M3, 2023)
+  - iMac (24-inch, M3, 2023)
+
   Devices based on the "M1 Pro", "M1 Max" and "M1 Ultra" SoCs:
 
   - MacBook Pro (14-inch, M1 Pro, 2021)
@@ -116,6 +123,14 @@ description: |
   - Mac Studio (M2 Ultra, 2023)
   - Mac Pro (M2 Ultra, 2023)
 
+  Devices based on the "M3 Pro", "M3 Max" and "M3 Ultra" SoCs:
+
+  - MacBook Pro (14-inch, M3 Pro, 2023)
+  - MacBook Pro (14-inch, M3 Max, 2023)
+  - MacBook Pro (16-inch, M3 Pro, 2023)
+  - MacBook Pro (16-inch, M3 Max, 2023)
+  - Mac Studio (M3 Ultra, 2025)
+
   The compatible property should follow this format:
 
   compatible = "apple,<targettype>", "apple,<socid>", "apple,arm-platform";
@@ -297,6 +312,29 @@ properties:
           - const: apple,t8112
           - const: apple,arm-platform
 
+      - description: Apple M3 SoC based platforms
+        items:
+          - enum:
+              - apple,j433 # iMac (24-inch, 2x USB-C, M3, 2023)
+              - apple,j434 # iMac (24-inch, 4x USB-C, M3, 2023)
+              - apple,j504 # MacBook Pro (14-inch, M3, 2023)
+              - apple,j613 # MacBook Air (13-inch, M3, 2024)
+              - apple,j615 # MacBook Air (15-inch, M3, 2024)
+          - const: apple,t8122
+          - const: apple,arm-platform
+
+      - description: Apple M4 SoC based platforms
+        items:
+          - enum:
+              - 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, M3, 2025)
+              - apple,j715  # MacBook Air (15-inch, M3, 2025)
+              - apple,j773g # Mac mini (M4, 2024)
+          - const: apple,t8132
+          - const: apple,arm-platform
+
       - description: Apple M1 Pro SoC based platforms
         items:
           - enum:
@@ -347,6 +385,35 @@ properties:
           - const: apple,t6022
           - const: apple,arm-platform
 
+      - description: Apple M3 Pro SoC based platforms
+        items:
+          - enum:
+              - apple,j514s  # MacBook Pro (14-inch, M3 Pro, 2023)
+              - apple,j516s  # MacBook Pro (16-inch, M3 Pro, 2023)
+          - const: apple,t6030
+          - const: apple,arm-platform
+
+      - description: Apple M3 Max SoC based platforms
+        oneOf:
+          - items:
+              - enum:
+                  - apple,j514c  # MacBook Pro (14-inch, M3 Max, 16 cores, 2023)
+                  - apple,j516c  # MacBook Pro (16-inch, M3 Max, 16 cores, 2023)
+              - const: apple,t6031
+              - const: apple,arm-platform
+          - items:
+              - enum:
+                  - apple,j514m  # MacBook Pro (14-inch, M3 Max, 14 cores, 2023)
+                  - apple,j516m  # MacBook Pro (16-inch, M3 Max, 14 cores, 2023)
+              - const: apple,t6034
+              - const: apple,arm-platform
+
+      - description: Apple M3 Ultra SoC based platforms
+        items:
+          - const: apple,j575d  # Mac Studio (M3 Ultra, 2025)
+          - const: apple,t6032
+          - const: apple,arm-platform
+
 additionalProperties: true
 
 ...

Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml

@@ -36,7 +36,12 @@ properties:
           - const: syscon
           - const: simple-mfd
       - items:
-          - const: apple,t6020-pmgr
+          - enum:
+              - apple,t6020-pmgr
+              - apple,t6030-pmgr
+              - apple,t6031-pmgr
+              - apple,t8122-pmgr
+              - apple,t8132-pmgr
           - const: apple,t8103-pmgr
           - const: syscon
           - const: simple-mfd

Documentation/devicetree/bindings/arm/cpus.yaml

@@ -86,6 +86,8 @@ properties:
           - apple,avalanche
           - apple,blizzard
           - apple,cyclone
+          - apple,donan-e
+          - apple,donan-p
           - apple,everest
           - apple,firestorm
           - apple,hurricane-zephyr

Documentation/devicetree/bindings/dma/apple,admac.yaml

@@ -10,7 +10,7 @@ description: |
   Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples
   on SoCs from the "Apple Silicon" family.
 
-  The controller has been seen with up to 24 channels. Even-numbered channels
+  The controller has been seen with up to 32 channels. Even-numbered channels
   are TX-only, odd-numbered are RX-only. Individual channels are coupled to
   fixed device endpoints.
 
@@ -33,6 +33,12 @@ properties:
               - apple,t8103-admac
               - apple,t8112-admac
           - const: apple,admac
+      - items:
+          - enum:
+              - apple,t6030-admac
+              - apple,t6031-admac
+          - const: apple,t8122-admac
+      - const: apple,t8122-admac
 
   reg:
     maxItems: 1
@@ -43,7 +49,7 @@ properties:
       Clients specify a single cell with channel number.
 
   dma-channels:
-    maximum: 24
+    maximum: 32
 
   interrupts:
     minItems: 4

Documentation/devicetree/bindings/dma/apple,sio.yaml

@@ -0,0 +1,111 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/apple,sio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple SIO Coprocessor
+
+description:
+  SIO is a coprocessor on Apple M1 and later chips (and maybe also on earlier
+  chips). Its role is to offload SPI, UART and DisplayPort audio transfers,
+  being a pretend DMA controller.
+
+maintainers:
+  - Martin Povišer <povik+lin@cutebit.org>
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,t6000-sio
+          - apple,t8103-sio
+      - const: apple,sio
+
+  reg:
+    maxItems: 1
+
+  '#dma-cells':
+    const: 1
+    description:
+      DMA clients specify a single cell that corresponds to the RTKit endpoint
+      number used for arranging the transfers in question
+
+  dma-channels:
+    maximum: 128
+
+  mboxes:
+    maxItems: 1
+
+  iommus:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  memory-region:
+    minItems: 2
+    maxItems: 8
+    description:
+      A number of references to reserved memory regions among which are the DATA/TEXT
+      sections of coprocessor executable firmware and also auxiliary firmware data
+      describing the available DMA-enabled peripherals
+
+  apple,sio-firmware-params:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: |
+      Parameters in the form of opaque key/value pairs that are to be sent to the SIO
+      coprocesssor once it boots. These parameters can point into the reserved memory
+      regions (in device address space).
+
+      Note that unlike Apple's firmware, we treat the parameters, and the data they
+      refer to, as opaque. Apple embed short data blobs into their SIO devicetree node
+      that describe the DMA-enabled peripherals (presumably with defined semantics).
+      Their driver processes those blobs and sets up data structure in mapped device
+      memory, then references this memory in the parameters sent to the SIO. At the
+      level of description we are opting for in this binding, we assume the job of
+      constructing those data structures has been done in advance, leaving behind an
+      opaque list of key/value parameter pairs to be sent by a prospective driver.
+
+      This approach is chosen for two reasons:
+
+       - It means we don't need to try to understand the semantics of Apple's blobs
+         as long as we know the transformation we need to do from Apple's devicetree
+         data to SIO data (which can be shoved away into a loader). It also means the
+         semantics of Apple's blobs (or of something to replace them) need not be part
+         of the binding and be kept up with Apple's firmware changes in the future.
+
+       - It leaves less work for the driver attaching on this binding. Instead the work
+         is done upfront in the loader which can be better suited for keeping up with
+         Apple's firmware changes.
+
+required:
+  - compatible
+  - reg
+  - '#dma-cells'
+  - dma-channels
+  - mboxes
+  - iommus
+  - power-domains
+
+additionalProperties: false
+
+examples:
+  - |
+    sio: dma-controller@36400000 {
+      compatible = "apple,t8103-sio", "apple,sio";
+      reg = <0x36400000 0x8000>;
+      dma-channels = <128>;
+      #dma-cells = <1>;
+      mboxes = <&sio_mbox>;
+      iommus = <&sio_dart 0>;
+      power-domains = <&ps_sio_cpu>;
+      memory-region = <&sio_text>, <&sio_data>,
+                      <&sio_auxdata1>, <&sio_auxdata2>; /* Filled by loader */
+      apple,sio-firmware-params = <0xb 0x10>, <0xc 0x1b80>, <0xf 0x14>,
+                                  <0x10 0x1e000>, <0x30d 0x34>, <0x30e 0x4000>,
+                                  <0x1a 0x38>, <0x1b 0x50>; /* Filled by loader */
+    };

Documentation/devicetree/bindings/gpio/apple,smc-gpio.yaml

@@ -14,7 +14,9 @@ description:
 
 properties:
   compatible:
-    const: apple,smc-gpio
+    enum:
+      - apple,smc-gpio
+      - apple,smc-low-gpio
 
   gpio-controller: true
 

Documentation/devicetree/bindings/hwmon/apple,smc-hwmon.yaml

@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/apple,smc-hwmon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple SMC Hardware Monitoring
+
+description:
+  Apple's System Management Controller (SMC) exposes a vast array of
+  hardware monitoring sensors, including temperature probes, current and
+  voltage sense, power meters, and fan speeds. It also provides endpoints
+  to manually control the speed of each fan individually. Each Apple
+  Silicon device exposes a different set of endpoints via SMC keys. This
+  is true even when two machines share an SoC. The CPU core temperature
+  sensor keys on an M1 Mac mini are different to those on an M1 MacBook
+  Pro, for example.
+
+maintainers:
+  - James Calligeros <jcalligeros99@gmail.com>
+
+$defs:
+  sensor:
+    type: object
+
+    properties:
+      apple,key-id:
+        $ref: /schemas/types.yaml#/definitions/string
+        pattern: "^[A-Za-z0-9]{4}$"
+        description: The SMC FourCC key of the desired sensor.
+          Must match the node's suffix.
+
+      label:
+        description: Human-readable name for the sensor
+
+    required:
+      - apple,key-id
+
+properties:
+  compatible:
+    const: apple,smc-hwmon
+
+patternProperties:
+  "^current-[A-Za-z0-9]{4}$":
+    $ref: "#/$defs/sensor"
+    unevaluatedProperties: false
+
+  "^fan-[A-Za-z0-9]{4}$":
+    $ref: "#/$defs/sensor"
+    unevaluatedProperties: false
+
+    properties:
+      apple,fan-minimum:
+        $ref: /schemas/types.yaml#/definitions/string
+        pattern: "^[A-Za-z0-9]{4}$"
+        description: SMC key containing the fan's minimum speed
+
+      apple,fan-maximum:
+        $ref: /schemas/types.yaml#/definitions/string
+        pattern: "^[A-Za-z0-9]{4}$"
+        description: SMC key containing the fan's maximum speed
+
+      apple,fan-target:
+        $ref: /schemas/types.yaml#/definitions/string
+        pattern: "^[A-Za-z0-9]{4}$"
+        description: Writeable endpoint for setting desired fan speed
+
+      apple,fan-mode:
+        $ref: /schemas/types.yaml#/definitions/string
+        pattern: "^[A-Za-z0-9]{4}$"
+        description: Writeable key to enable/disable manual fan control
+
+
+  "^power-[A-Za-z0-9]{4}$":
+    $ref: "#/$defs/sensor"
+    unevaluatedProperties: false
+
+  "^temperature-[A-Za-z0-9]{4}$":
+    $ref: "#/$defs/sensor"
+    unevaluatedProperties: false
+
+  "^voltage-[A-Za-z0-9]{4}$":
+    $ref: "#/$defs/sensor"
+    unevaluatedProperties: false
+
+additionalProperties: false

Documentation/devicetree/bindings/i2c/apple,i2c.yaml

@@ -24,7 +24,10 @@ properties:
       - items:
           - enum:
               - apple,t6020-i2c
+              - apple,t6030-i2c
+              - apple,t6031-i2c
               - apple,t8122-i2c
+              - apple,t8132-i2c
           - const: apple,t8103-i2c
       - items:
           - enum: