linux-kernel - Re: [PATCH] dt-bindings: phy: samsung,ufs-phy: add power-domains

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Message-ID: <15e8c6620fd7b49a64df9aad75afccd32995cf29.camel@linaro.org>
Date: Wed, 08 Oct 2025 10:00:38 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Alim Akhtar <alim.akhtar@...sung.com>, 'Vinod Koul' <vkoul@...nel.org>, 
 'Kishon Vijay Abraham I'	 <kishon@...nel.org>, 'Rob Herring'
 <robh@...nel.org>, 'Krzysztof Kozlowski'	 <krzk+dt@...nel.org>, 'Conor
 Dooley' <conor+dt@...nel.org>
Cc: 'Peter Griffin' <peter.griffin@...aro.org>, 'Tudor Ambarus'
	 <tudor.ambarus@...aro.org>, 'Will McVicker' <willmcvicker@...gle.com>, 
	kernel-team@...roid.com, linux-phy@...ts.infradead.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: phy: samsung,ufs-phy: add power-domains

Alim,

On Wed, 2025-10-08 at 09:07 +0100, André Draszik wrote:
> Hi Alim,
> 
> On Wed, 2025-10-08 at 11:56 +0530, Alim Akhtar wrote:
> > 
> > 
> > > -----Original Message-----
> > > From: André Draszik <andre.draszik@...aro.org>
> > > Sent: Tuesday, October 7, 2025 9:32 PM
> > > To: Vinod Koul <vkoul@...nel.org>; Kishon Vijay Abraham I
> > > <kishon@...nel.org>; Rob Herring <robh@...nel.org>; Krzysztof Kozlowski
> > > <krzk+dt@...nel.org>; Conor Dooley <conor+dt@...nel.org>; Alim Akhtar
> > > <alim.akhtar@...sung.com>
> > > Cc: Peter Griffin <peter.griffin@...aro.org>; Tudor Ambarus
> > > <tudor.ambarus@...aro.org>; Will McVicker <willmcvicker@...gle.com>;
> > > kernel-team@...roid.com; linux-phy@...ts.infradead.org;
> > > devicetree@...r.kernel.org; linux-kernel@...r.kernel.org; André Draszik
> > > <andre.draszik@...aro.org>
> > > Subject: [PATCH] dt-bindings: phy: samsung,ufs-phy: add power-domains
> > > 
> > > The UFS phy can be part of a power domain, so we need to allow the
> > > relevant property 'power-domains'.
> > > 
> > Can you cross check if there is a separate power domain control for ufs-phy? 
> 
> I'm still having some other troubles with the hsi2 (UFS) power domain on gs101,
> but I can confirm the usb-phy is part of the hsi0 (USB) power domain. So for the
> ufs-phy I presume it's similar: it should be part of the hsi2 power domain. There
> certainly is no separate domain for the ufs-phy itself.

After double checking the HSI2 HDD, the ufs-phy is indeed part of PD_HSI2.


Cheers,
Andre'