[PATCH v2] arm64: dts: rockchip: rock-3b: Model PI6C20100 as gated-fixed-clock

[Shawn Lin]

在 2026/03/19 星期四 18:19, MidG971 写道:
> On 2026/03/04, Shawn Lin wrote:
>> IIUC, you are using Claude to help generate this patch, please
>> describe it properly, for example,
>>
>> Co-developed-by: Claude claude-opus-4-20250514 [1]
>> or
>> Assisted-by: Claude:claude-3-opus [2]
>>
>> [1] https://lwn.net/Articles/1031473/
>> [2] https://docs.kernel.org/process/coding-assistants.html
> 
> Thank you for the guidance. I used Claude as a coding assistant and
> will use the proper tag in v3:
> 
>    Assisted-by: Claude:claude-3-opus
>    Signed-off-by: MidG971 <midgy971 at gmail.com>
> 
>> There is a missing pipe clock which should be fixed. Please
>> refer to David's patch[3].
>>
>> [3] https://lore.kernel.org/linux-rockchip/d981fa84-bd05-ac9d-98ca-89ee47177829@rock-chips.com/T/#m6a8289609e6a60691d3c06358b6322c7aa5e43d1
> 
> Since our board-level &pcie3x2 override replaces the clocks property
> entirely, v3 adds CLK_PCIE30X2_PIPE_DFT ("pipe") as well, consistent
> with David's base DTS patch.
> 
> I tested v3 on the ROCK 3B (kernel 6.19.0-rc5): pcie3x2 probes
> successfully and the NVMe device is detected at 15.75 Gb/s. The
> pcie30_refclk clock appears in the clock tree at 100MHz with pcie3x2
> as its consumer.
> 
> One note on the pipe clock test: CLK_PCIE30X2_PIPE_DFT is defined in
> rk3568-cru.h but was not yet registered in the CRU driver in the
> tested kernel build, so the pipe clock was excluded from the
> functional test (pcie3x2 probe fails with -ENOENT at clock index 5
> when it is included). The gated-fixed-clock node and ref clock were
> verified working. I expect the pipe clock will work once the CRU
> driver registers it alongside David's DTS patch.

Pipe clock support was applied and appears in linux-next[1], you could
pick it into your tested kernel build if you'd like to have a try.

[1]https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=41b1a6760959017c4fa1dbc7c3cc318406ab1455

> 
> v3 is sent separately.
> 
> Best regards,
> MidG971
> 
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