Re: [PATCH 3/3] arm64: dts: qcom: sm8250-asus-obiwan: Add ASUS ROG Phone 3

[Alexander Koskovich]

On Tuesday, March 10th, 2026 at 11:10 AM, Alexander Koskovich <akoskovich@xxxxx> wrote:

> On Tuesday, March 10th, 2026 at 7:31 AM, Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx> wrote:
> 
> > On 3/8/26 9:40 PM, Alexander Koskovich wrote:
> > > +&uart12 {
> > > +	/*
> > > +	 * Debug UART routed through a mux with an enable line on
> > > +	 * GPIO 170. The active state is unknown, so data may not
> > > +	 * pass through.
> >
> > Hm? Is that software-triggered, or is there some sort of a debug connector?
> 
> On second look, it actually looks like there's 2 nets coming out of the mux into the USB charger (bottom port). So could probably craft a debug cable to test this.
> 
> Yeah I was assuming that 170 is what triggers UART to actually work on this board, and that bootloader would enable/disable based on a fastboot command or something.
>

Picked up a USB test board today, was able to validate that UART is
present on A11/B11 (TX) and A10/B10 (RX). It is also enabled by default
and the enable GPIO is active low. Added a pinctrl to v3 just to be
explicit about it.

Validated that UART works on this device, nice to have.

> >
> > Konrad
> >
> >

Thanks,
Alex