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Wed, 08 Oct 2025 00:56:30 -0700 (PDT) Message-ID: Subject: Re: [PATCH] scsi: ufs: dt-bindings: exynos: add power-domains From: =?ISO-8859-1?Q?Andr=E9?= Draszik To: Alim Akhtar , 'Avri Altman' , 'Bart Van Assche' , 'Rob Herring' , 'Krzysztof Kozlowski' , 'Conor Dooley' Cc: 'Peter Griffin' , 'Tudor Ambarus' , 'Will McVicker' , kernel-team@android.com, linux-scsi@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 08 Oct 2025 08:56:29 +0100 In-Reply-To: <001501dc3815$601ec450$205c4cf0$@samsung.com> References: <20251007-power-domains-scsi-ufs-dt-bindings-exynos-v1-1-1acfa81a887a@linaro.org> <001501dc3815$601ec450$205c4cf0$@samsung.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2025-10-08 at 11:05 +0530, Alim Akhtar wrote: >=20 >=20 > > -----Original Message----- > > From: Andr=C3=A9 Draszik > > Sent: Tuesday, October 7, 2025 9:26 PM > > To: Alim Akhtar ; Avri Altman > > ; Bart Van Assche ; Rob > > Herring ; Krzysztof Kozlowski ; > > Conor Dooley > > Cc: Peter Griffin ; Tudor Ambarus > > ; Will McVicker ; > > kernel-team@android.com; linux-scsi@vger.kernel.org; > > devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux= - > > samsung-soc@vger.kernel.org; linux-kernel@vger.kernel.org; Andr=C3=A9 D= raszik > > > > Subject: [PATCH] scsi: ufs: dt-bindings: exynos: add power-domains > >=20 > > The UFS controller can be part of a power domain, so we need to allow t= he > > relevant property 'power-domains'. > >=20 > In Exynos, power domains has a boundary at _block_ level. I assume in thi= s > case it is BLK_HSI, which contains, multiple IPs within block, including = UFS > controller. On gs101, there are three hsi power domains: * hsi0 (USB) * hsi1 (PCIe) * hsi2 (UFS) I have not looked at hsi1 so far. >From what I can gather, hsi2-pd affects: * cmu_hsi2 * sysreg hsi2 * pinctrl (gpio) hsi2 * ufs * ufs-phy (not sure if there is more) hsi0-pd is similar, except that there is no pinctrl (gpio) hsi0. They're all modelled as individual nodes in DT, so we need to add the power-domains =3D <> to each of them. > I hope you will be sending the corresponding DTS changes as well.=20 Yes, of course :-) > Feel free to add=20 > Reviewed-by: Alim Akhtar Thanks :-) Cheers, Andre'