linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: x1e001de-devkit: Fix pin config for USB0 retimer vregs

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Message-ID: <aAd5/IEi9j7WAq5D@linaro.org>
Date: Tue, 22 Apr 2025 14:14:04 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Johan Hovold <johan@...nel.org>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sibi Sankar <quic_sibis@...cinc.com>, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: x1e001de-devkit: Fix pin config
 for USB0 retimer vregs

On 25-04-11 13:58:40, Johan Hovold wrote:
> On Sat, Apr 05, 2025 at 01:08:46AM +0200, Konrad Dybcio wrote:
> > On 3/18/25 4:50 PM, Abel Vesa wrote:
> > > Describe the missing power source, bias and direction for each of the USB0
> > > retimer gpio-controlled voltage regulators related pin configuration.
> > > 
> > > Fixes: 019e1ee32fec ("arm64: dts: qcom: x1e001de-devkit: Enable external DP support")
> > > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > > ---
> > >  arch/arm64/boot/dts/qcom/x1e001de-devkit.dts | 12 ++++++++++++
> > >  1 file changed, 12 insertions(+)
> > > 
> > > diff --git a/arch/arm64/boot/dts/qcom/x1e001de-devkit.dts b/arch/arm64/boot/dts/qcom/x1e001de-devkit.dts
> > > index 902335396c586a991c4a2de19906b039d887780f..8e88e00c335a05d0d36b4b08b85df82f38ef4355 100644
> > > --- a/arch/arm64/boot/dts/qcom/x1e001de-devkit.dts
> > > +++ b/arch/arm64/boot/dts/qcom/x1e001de-devkit.dts
> > > @@ -1039,6 +1039,10 @@ rtmr0_default: rtmr0-reset-n-active-state {
> > >  	usb0_3p3_reg_en: usb0-3p3-reg-en-state {
> > >  		pins = "gpio11";
> > >  		function = "normal";
> > > +		power-source = <1>; /* 1.8V */
> > 
> > Not sure if I'm a fan of these comments but sure
> 
> How come? 
> 
> Due to the incomplete bindings for these PMICs this is currently the
> only way we have to document this information. And AFAIU the voltage
> mapping can even differ from pin to pin on the same device.

I agree.

> 
> I would prefer to see a space before the SI unit though.

Will do.

> 
> Johan

Thanks for reviewing!

Abel