Re: [PATCH 00/11] Initial Apple M3 Pro, Max and Ultra device trees

[Janne Grunau <j@jannau.net>]

On Thu, Jul 09, 2026 at 09:30:46AM +0200, Janne Grunau wrote:
> This series adds device trees for Apple silicon devices with M3 Pro, Max
> and Ultra SoCs. The M3 generation has fewer devices than their M1 and M2
> predecessors. The only non-laptop device is the M3 Ultra Mac Studio. The
> Laptops are the known 14 and 16-inch Macbook Pros now with M3 Pro and
> M3 Max SoCs. The M3 Max variant with fewer CPU and GPU cores has
> additionally only a 384-bit wide memory bus instead of 512-bit of the
> full M3 Max. It has a separate identifier (T6034) and so there are six
> laptop device trees.
> Another difference to M1 and M2 Pro/Max/Ultra is that the M3 Pro is
> distinct SoC design and not a smaller M3 Max. For this reason both M3
> Max variants and the M3 Ultra will use "apple,t6030" as compatible
> prefix. In the M1 and M2 generations Pro, Max and Ultra SoCs shared
> "apple,t6000" / "apple,t6020" as common prefix. There is currently no
> known difference but M3 Pro and M3 Max are not as closely related as
> previously.
> 
> This series adds the same level of hardware as the base M3 (T8122) has
> in v7.2-rc1. This includes CPU cores, interrupt controller, power
> states, watchdog, serial, pin controller, i2c and the boot framebuffer.
> This is intended as base so that support for additional hardware can be
> added to all M3 based devices at the same time.
> 
> Merge strategy:
> Since the dt-binding add new compatible strings without driver changes
> it would be preferred if the whole [1] series would be merged through
> apple-soc/arm-soc. This will help ensuring a warning free
> `make dtbs_check` for followup series with additional M3* hardware
> support I hope to send for this cycle.
> 
> This series will conflict with the M4 series [3] sent A couple of days
> ago. I would prefer if this could be merged first (in order of SoC
> release).
> 
> [1]: I see that the M4 watchdog change was already picked up by Guenter
>      in [2] 
> 
> Link: https://lore.kernel.org/asahi/a03c19ee-cf74-4f26-826d-f2bfb816fb3f@roeck-us.net/ [2]
> Link: https://lore.kernel.org/asahi/20260705-apple-m4-initial-devicetrees-v1-0-e5655ee56523@cyberchaos.dev/ [3]

I fixed the legitimate issues poited out by sashiko locally and will
send a v2 in the next days. From the v2 changelog:

- fix serial0 unit address in t6030.dtsi, drop erroneously added 0
- Fix device node reference in pinctrl_{nub,aop} gpio-ranges in t6030.dtsi
- fix i2c6 unit address in t6031-die0.dtsi
- fix cpu_p25 reg value in t6032.dtsi
- drop unnecessary aic interrupt-controller from t6032.dtsi
- drop "label" from keyboard pwm led node
- fix copy-n-pasted pinctrl in compatible strings in the apple,s5l-fpwm
  dt-binding commit message
- fix yamllint errors in apple.yaml and fix warnings in newly added
  lines

Janne