linux-kernel - Re: [PATCH 0/3] arm64: dts: apple: Add integrated USB Type-C ports

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Message-ID: <9a0590d7-6d3f-422d-8db8-a30845180298@kernel.org>
Date: Sat, 10 Jan 2026 12:36:13 +0100
From: Sven Peter <sven@...nel.org>
To: Janne Grunau <j@...nau.net>
Cc: asahi@...ts.linux.dev, Neal Gompa <neal@...pa.dev>,
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
 Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Rob Herring <robh@...nel.org>,
 linux-kernel@...r.kernel.org, Hector Martin <marcan@...can.st>,
 R <rqou@...keley.edu>
Subject: Re: [PATCH 0/3] arm64: dts: apple: Add integrated USB Type-C ports

On 1/9/26 15:07, Janne Grunau wrote:
> Now that all dependencies for USB 2.0 and 3.x support are either merged
> (tipd changes in v6.18, dwc3-apple in v6.19-rc1) or in linux-next (Apple
> Type-C PHY) prepare device tree changes to expose the ports.
>
> Each port on Apple silicon devices is driven by a separate collection of
> hardware blocks. For USB 2.0 and 3.x the collection consists of:
> - Apple Type-C PHY, combo PHY for USB 2.0, USB 3.x, USB4/Thunderbolt and
>    DisplayPort
> - Synopsys Designware dwc3 USB controller
> - two DART iommu instances for dwc3
> - CD321x USB PD controller (similar to Ti's TPS6598x series)
>
> The CD321x nodes are already present so this series add the remaining
> devices nodes, typec connector nodes and connections between all
> components.
>
> The devices expose except for a few exceptions noted below all ports. M1
> and M2 have two ports, M1 and M2 Pro and Max have four ports and
> M1 and M2 Ultra have eight ports.
> The Pro and Max based Macbook Pros use only three ports. The fourth port
> is used as DisplayPort PHY to drive a HDMI output via an integrated
> DP to HDMI converter.
> The Ultra based Mac studio devices only use six ports. The third and
> fourth port on the second die is completely fused off.
>
> The changes for t600x and t602x are in a single commit since the devices
> share .dtsi files across SoC generations due to their similarity.
>
> Depends on commit c1538b87caef ("dt-bindings: phy: Add Apple Type-C
> PHY") in linux-phy's [1] next branch for `make dtbs_check` to pass.
> checkpatch warns about the undocumented DT compatible strings
> "apple,t8112-atcphy", "apple,t6000-atcphy" and "apple,t6020-atcphy" but
> not about "apple,t8103-atcphy". I don't under why it doesn't warn about
> the last. "apple,t8103-atcphy" is only found in the added devicetree
> files and nowhere else in v6.19-rc1.
>
> Tested on top of next-20260106 on M1, M2, M1 Max and M2 Pro Mac mini /
> Mac studio and a few fixes for dwc3-apple and atc [2, 3, 4, 5].
>
> Link: https://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy.git/ [1]
> Link: https://lore.kernel.org/asahi/20260104-atcphy-tunable-fix-v2-1-84e5c2a57aaa@kernel.org/ [2]
> Link: https://lore.kernel.org/asahi/20260108-atcphy-coldboot-fix-v1-1-01c41c6e84f2@kernel.org/ [3]
> Link: https://lore.kernel.org/asahi/20260108-dwc3-apple-usb2phy-fix-v1-1-5dd7bc642040@kernel.org/ [4]
> Link: https://lore.kernel.org/asahi/20260109-apple-dwc3-role-switch-v1-1-11623b0f6222@jannau.net/ [5]
> Signed-off-by: Janne Grunau <j@...nau.net>
> ---


thanks for doing this tedious work!
This all looks good to me and the t8103 changes have been running fine 
for a while on my machine now. I will give it another week or so on LKML 
before merging it!


Tested-by: Sven Peter <sven@...nel.org> # M1 mac mini and macbook air
Reviewed-by: Sven Peter <sven@...nel.org>


Best,

Sven