Re: [PATCH] usb: onboard_dev: add the Rockchip rk1808

[Chaoyi Chen]

Hello Rudi,

On 8/28/2026 9:24 PM, Rudi Heitbaum wrote:
> Hi Heiko,
> 
> I hadn't looked in to these from the mainline viewpoint. I had been
> using an adapted vendor script based on the radxa npu_powerctl binary
> which reimplements the npu_reset sequence over GPIO.
> 
> This has been the sequence:
> 
> gpio0 line 4   NPU_PWREN_1   -> 1, 2 ms
> gpio0 line 10  NPU_PWREN_2   -> 1, 2 ms
> gpio0 line 11  NPU_PWREN_3   -> 1, 2 ms
> gpio1 line 22                -> 1, 2 ms
> gpio1 line 23                -> 1, 2 ms
> gpio1 line 24  NPU_PWREN_6   -> 1, 25 ms
> gpio1 line 0                 -> 1  (reset release)
> 
> I have the schematics and the working N10 here, so let me look into
> describing these in the .dts and update the onboard_usb_dev.h.
> 

Perhaps we should first check whether the power-on sequence in
onboard_usb_dev.c meets the requirements, as it enables all
regulator supplies at the same time.

-- 
Best, 
Chaoyi