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mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=nicolas.frattaroli@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1772024214; s=zohomail; d=collabora.com; i=nicolas.frattaroli@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Content-Type:Message-Id:Reply-To; bh=0ajGVOhZgJOdHcOgWpjrAR3tDuhSfoXYdy0PzsAjZP0=; b=ipYumGPfVekix1b30H5OrkHdJ75Du0EPbskX0BqwHuNtUsOPeSPeVt9b4ypgICk6 XnnowUv+Y8bxWYzdOLaOlMu6ZbBiiFU3ktHsOPDjubZNr+HDf1QTLC3/NveceeRuEok 2L+C606lheDu7Ip93rblXJDGT9j+c8gYCJsycLEg= Received: by mx.zohomail.com with SMTPS id 1772024213678970.8709094887984; Wed, 25 Feb 2026 04:56:53 -0800 (PST) From: Nicolas Frattaroli To: "chu.stanley@gmail.com" , "robh@kernel.org" , Chunfeng Yun =?UTF-8?B?KOS6keaYpeWzsCk=?= , "kishon@kernel.org" , "James.Bottomley@HansenPartnership.com" , "bvanassche@acm.org" , AngeloGioacchino Del Regno , "neil.armstrong@linaro.org" , "conor+dt@kernel.org" , Chaotian Jing =?UTF-8?B?KOS6leacneWkqSk=?= , "lgirdwood@gmail.com" , "vkoul@kernel.org" , "krzk+dt@kernel.org" , "p.zabel@pengutronix.de" , "alim.akhtar@samsung.com" , "matthias.bgg@gmail.com" , "avri.altman@wdc.com" , "martin.petersen@oracle.com" , "broonie@kernel.org" , Peter Wang =?UTF-8?B?KOeOi+S/oeWPiyk=?= Cc: "linux-scsi@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-phy@lists.infradead.org" , "linux-mediatek@lists.infradead.org" , Louis-Alexis Eyraud , "kernel@collabora.com" Subject: Re: [PATCH v7 22/23] scsi: ufs: mediatek: Remove undocumented "clk-scale-up-vcore-min" Date: Wed, 25 Feb 2026 13:56:46 +0100 Message-ID: <6563087.lOV4Wx5bFT@workhorse> In-Reply-To: References: <20260216-mt8196-ufs-v7-0-b5f2907c6da7@collabora.com> <20260216-mt8196-ufs-v7-22-b5f2907c6da7@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260225_045706_976922_E0513A3D X-CRM114-Status: GOOD ( 15.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wednesday, 25 February 2026 11:37:27 Central European Standard Time Pete= r Wang (=E7=8E=8B=E4=BF=A1=E5=8F=8B) wrote: > On Mon, 2026-02-16 at 14:37 +0100, Nicolas Frattaroli wrote: > > The MediaTek UFS driver contains support for an undocumented, > > non-vendor-prefixed u32 property named "clk-scale-up-vcore-min". > >=20 > > Since it is not part of any binding, and would not pass a bindings > > review in its current form, remove it. > >=20 > > To return this functionality, it needs to be resubmitted in a series > > that also introduces it to the binding, and justifies what it is used > > for. Compatibility with downstream device trees is not a valid > > justification for its existence. > >=20 > > Signed-off-by: Nicolas Frattaroli >=20 > Can MT8196 work on Gear 5 without raising Vcore? I do not have access to the documentation to answer this question. However, you likely do. > I'm afraid it might cause problems. > Maybe we can add the correct binding for MT8196? The correct binding is to do this with OPPs instead, which is a future task that can be tackled (by someone else) once the broad cleanups in this series have landed. Adding a "clk-scale-up-vcore-min" property to the MediaTek UFS binding would not pass DT bindings review. >=20 > Thanks > Peter >=20