From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F9A9C433E0 for ; Mon, 6 Jul 2020 15:53:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 249A220722 for ; Mon, 6 Jul 2020 15:53:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="DfexGLms" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729429AbgGFPx5 (ORCPT ); Mon, 6 Jul 2020 11:53:57 -0400 Received: from mailout3.samsung.com ([203.254.224.33]:52620 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729364AbgGFPx5 (ORCPT ); Mon, 6 Jul 2020 11:53:57 -0400 Received: from epcas5p4.samsung.com (unknown [182.195.41.42]) by mailout3.samsung.com (KnoxPortal) with ESMTP id 20200706155353epoutp03861f5ab0915eea1c2c5bb466c8d64881~fNMmuhcfs2380523805epoutp03_ for ; Mon, 6 Jul 2020 15:53:53 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout3.samsung.com 20200706155353epoutp03861f5ab0915eea1c2c5bb466c8d64881~fNMmuhcfs2380523805epoutp03_ DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1594050833; bh=GWXYfDKAYwwxxk6FrcmqUEL3Q0Iav7F34gH3uoT2p0Y=; h=From:To:Cc:In-Reply-To:Subject:Date:References:From; b=DfexGLmsnn6rh78HDgb36ZzB1Rz84cO4wnlDBznan0pHkrQ0ahh2LElJfsgt0mF/V opuzAfITO3Ho/HiJn1Cy4FIIWe07NOiU2VR09lt/DwIb1MM9ikZ+BQ/OzLKnWySo0P iDcBNR6fWskiqonxdj1XAemjx7mnSNrJcrcQqSgY= Received: from epsmges5p1new.samsung.com (unknown [182.195.42.73]) by epcas5p3.samsung.com (KnoxPortal) with ESMTP id 20200706155353epcas5p3a881bb765ba16c67a3fe7957c3368aae~fNMmOoIO62799627996epcas5p3Q; Mon, 6 Jul 2020 15:53:53 +0000 (GMT) Received: from epcas5p2.samsung.com ( [182.195.41.40]) by epsmges5p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 8C.C6.09467.119430F5; Tue, 7 Jul 2020 00:53:53 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPA id 20200706155352epcas5p1dda4df18c037960b6a326e077d7cec8f~fNMlscvsB2582125821epcas5p1d; Mon, 6 Jul 2020 15:53:52 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200706155352epsmtrp184f8be7fa0a1763a02af5e6af535cdbc~fNMlruSTj1979919799epsmtrp1-; Mon, 6 Jul 2020 15:53:52 +0000 (GMT) X-AuditID: b6c32a49-a3fff700000024fb-5b-5f0349113747 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id C1.1B.08382.019430F5; Tue, 7 Jul 2020 00:53:52 +0900 (KST) Received: from alimakhtar02 (unknown [107.108.234.165]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200706155350epsmtip1097297e896e175d74dd7052060e220cf~fNMj-mzah0236102361epsmtip1E; Mon, 6 Jul 2020 15:53:50 +0000 (GMT) From: "Alim Akhtar" To: "'Krzysztof Kozlowski'" Cc: , , , , In-Reply-To: <20200705182306.GA13827@kozik-lap> Subject: RE: [PATCH v1 2/2] arm64: dts: exynos: keep LDO12 always-on Date: Mon, 6 Jul 2020 21:23:49 +0530 Message-ID: <02e601d653ad$a5734190$f059c4b0$@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQJLYggk8ojyKiThj86cHLqsfdRQHAG6bdnCAyh2CO0B1MYKXqfa1vMg Content-Language: en-in X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFuplleLIzCtJLcpLzFFi42LZdlhTQ1fQkzneYOJZIYv5R86xWpw/v4Hd YtPja6wWl3fNYbOYcX4fk0Xr3iPsDmwem1Z1snlsXlLv8XmTXABzFJdNSmpOZllqkb5dAlfG mePL2Qo+8Ffs2LmXtYHxF08XIyeHhICJxP+2WUxdjFwcQgK7GSXWf7/GCOF8YpTYfOUpC4Tz jVHiUt9L9i5GDrCWnS2OEPG9jBLvbjUzQzhvGCUu/zjHDDKXTUBXYsfiNjYQWwTI3nxjOTtI EbPAckaJW79vsIBM4hTQl3jYHwFSIyzgIrG8Zx8jiM0ioCKx+8B+VhCbV8BS4v2zlSwQtqDE yZlPwGxmAW2JZQtfM0P8oCDx8+kyVohdbhK3dq9hhqgRlzj6swfsOAmBv+wS3TN2QzW4SMze 3McEYQtLvDq+hR3ClpJ42d8G9WW2RM8uY4hwjcTSecdYIGx7iQNX5oCdzyygKbF+lz7EKj6J 3t9PmCA6eSU62oQgqlUlmt9dheqUlpjY3c0KUeIhcaQtdQKj4iwkf81C8tcsJPfPQti1gJFl FaNkakFxbnpqsWmBYV5quV5xYm5xaV66XnJ+7iZGcIrR8tzBePfBB71DjEwcjIcYJTiYlUR4 e7UZ44V4UxIrq1KL8uOLSnNSiw8xSnOwKInzKv04EyckkJ5YkpqdmlqQWgSTZeLglGpgck4/ WVKqzFLVqym8bdG+I4JWy/Vf/z5noXCpxVHtxcyV/P1MvA8nB6offP7s2jHDKecynQ5npV11 vSA0dd/BnizDdmu9wrtOnncSD9qummwaqMic9GtTJfv5rIDnSdH+yjdc98l0cV/IX2rHdPLC vKSP8y33Luk6p/PBYMu6OaxbP7eyzUld5G551qNoxZHInguTQ2t25EpvjHht8fha7cLbLq0P A5l0eEOaU0S3ndvV3f41/PXFmRfWcRjVbvPZzsYgHrjDp6Tpbf2Hp5F7V61dI8bKOr21eev8 lY9nbWhmvrzaecvZAs8UY/5wp6PuXrUschtWn+d1nVxb6x0fuOTjJL6YwtASC9OHs0PblFiK MxINtZiLihMBitxqhKADAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrMLMWRmVeSWpSXmKPExsWy7bCSnK6AJ3O8wf0Huhbzj5xjtTh/fgO7 xabH11gtLu+aw2Yx4/w+JovWvUfYHdg8Nq3qZPPYvKTe4/MmuQDmKC6blNSczLLUIn27BK6M JSeesBdc5K/Y8PMecwPjTZ4uRg4OCQETiZ0tjl2MXBxCArsZJT7f/MTcxcgJFJeWuL5xAjuE LSyx8t9zdoiiV4wSu75/BytiE9CV2LG4jQ3EFgGyN99YDlbELLCaUeLvvT3MEB2PGCW2Xj/N CrKOU0Bf4mF/BEiDsICLxPKefYwgNouAisTuA/tZQWxeAUuJ989WskDYghInZz4Bs5kFtCWe 3nwKZy9b+BrqUgWJn0+XsUIc4SZxa/caZogacYmjP3uYJzAKz0IyahaSUbOQjJqFpGUBI8sq RsnUguLc9NxiwwLDvNRyveLE3OLSvHS95PzcTYzgeNHS3MG4fdUHvUOMTByMhxglOJiVRHh7 tRnjhXhTEiurUovy44tKc1KLDzFKc7AoifPeKFwYJySQnliSmp2aWpBaBJNl4uCUamCSSm9o DVUu8lS5t9x8Y7XhPHtOk8ztDFN3JFS8eTX34+63UjvdZl3kfs5/oFL1o0TvsZMOorLHHbwS TvxOvFizk/M4g8uKrHd6fIb/Vl28qtR/Zeatbh65HfU7H8fq7KzbHlEmqcbxz++QEZ+L9cPk w7/vHJ+7S0xcXrY1c/rEKHGrg69PMorGLqiTOyL+6Gp84bpPyReL7P5/Pye5pJ/vMcvbOSnL nq6s+iBVe3hauumpJpHa/6WJ3YE7U6Tnf3c8zntORSn28zfN/RMS69pWRJx4mv1wQmV4Nw/H NfkGyQsnp95h8VGwtWwX/FBQXHYz2Cqs+NmMdZM86nVZVP3+1HpePTHPYNMGU6YzTNVKLMUZ iYZazEXFiQDy7wpQBgMAAA== X-CMS-MailID: 20200706155352epcas5p1dda4df18c037960b6a326e077d7cec8f X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20200705072938epcas5p479f0d040ca34fd44b2ba893a199efb79 References: <20200705070918.63531-1-alim.akhtar@samsung.com> <20200705070918.63531-2-alim.akhtar@samsung.com> <20200705182306.GA13827@kozik-lap> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Krzysztof, > -----Original Message----- > From: Krzysztof Kozlowski > Sent: 05 July 2020 23:53 > To: Alim Akhtar > Cc: devicetree=40vger.kernel.org; linux-arm-kernel=40lists.infradead.org;= linux- > samsung-soc=40vger.kernel.org; linux-kernel=40vger.kernel.org; > robh+dt=40kernel.org > Subject: Re: =5BPATCH v1 2/2=5D arm64: dts: exynos: keep LDO12 always-on >=20 > On Sun, Jul 05, 2020 at 12:39:18PM +0530, Alim Akhtar wrote: > > LDO12 on exynos7 supply power to VDDQ_UFS20_RESET, in case this > > regulator is OFF, UFS host controller can not send command to UFS > > device. To keep this supply ON, set regulator-always-on property for > > this ldo. >=20 > Why UFS does not take any supplies? This looks like a workaround for the = case > of not implementing any consumer. >=20 This particular supply is not part of UFS HCI spec and binding documentatio= n, as per binding only one supply for host controller and three others for = UFS device are needed. My best guess is, VDDQ_UFS20_RESET supply to reset l= ogic block inside HCI, which might be specific to this controller version (= I did not find any such supply in the latest host controller though). > Best regards, > Krzysztof >=20 >=20 > > > > Signed-off-by: Alim Akhtar > > --- > > arch/arm64/boot/dts/exynos/exynos7-espresso.dts =7C 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > > b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > > index bb86950032d3..92fecc539c6c 100644 > > --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > > +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > > =40=40 -194,6 +194,7 =40=40 > > regulator-min-microvolt =3D <1000000>; > > regulator-max-microvolt =3D <1300000>; > > regulator-enable-ramp-delay =3D <125>; > > + regulator-always-on; > > =7D; > > > > ldo13_reg: LDO13 =7B > > -- > > 2.17.1 > >