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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 17BC0C433F5 for ; Wed, 22 Dec 2021 13:28:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=W2gKrUG+BjTDkOY5b3iwk/H4VZK9g63SVFsKiagcsmw=; b=yRer6TGYAq7QVhwwDDXCfXBY68 5fWba7tYdyRZ1s/agqu4Kkic9EDQ2g0V7TYJZqzQCAuooTDwFEu94W/WMR89HCAo+VkrLV/T0Ie48 vYtMlFf16QqTf7S+oxPqPfdxteLVtaUMEGwVWJPcl2LwANr0yebUsZ6CJpU6aSwF2MRpGr8RC82zN JPcybVziMlbI6hSTkZR8KYunZ5pHUats9edshtYSNw/T3tmEiOl7tGozZua3U9k+y0LR4kqdbk/R7 WSGJgLjc2ZfDU09qMhbnA+Lyhlwx/whS+ARVXBa/CCN22JQw1ns3ACl0BvDD1/I9WXyiTUt7C2EKY ZV4T/PXA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n01fm-00AWwn-44; Wed, 22 Dec 2021 13:28:50 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n01cJ-00AVNF-3u; Wed, 22 Dec 2021 13:25:16 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 963A061A3D; Wed, 22 Dec 2021 13:25:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4EF00C36AE5; Wed, 22 Dec 2021 13:25:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1640179514; bh=nR4xwe4dlsBLj6hoxeOrNguo8C1T2r8S9EvD4cqoYlc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gWNSYl5i1ra1dNgISHgtC/Ragblm/DAknFB57eZaEafCfjjVWvodrwg1SsvJ1EUs5 0bYQGFHpXqruURx4ecn0i9vy8vC/iEjSlEKlRZ+saNGCISdttKgn14QqCd1xHTGAL0 TauJzz+4SIBYRBGRYdGGzCoSftZNMqNuA0+I6sCIPCHb0u+4vJs9I8clnLIkpMaFX2 hn4Xvni54eeMAZilGJyF+6dIIueV/S6Rnb5unXixZsLkgRQ2/+cb4JPXPeqoUbv+pJ 5/xurOSxPRSYqdlRgXOA1zN+rBXL4yf2fW6T5E/+N/Q0ugbgbQqtbciMVJMk/RJ4vU FT8unVeln4UWg== Date: Wed, 22 Dec 2021 13:25:09 +0000 From: Mark Brown To: Robin Murphy Cc: Sascha Hauer , linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Heiko Stuebner , Michael Riesch , kernel@pengutronix.de Subject: Re: [PATCH 3/4] soc: rockchip: power-domain: Add regulator support Message-ID: References: <20211217130919.3035788-1-s.hauer@pengutronix.de> <20211217130919.3035788-4-s.hauer@pengutronix.de> <20211220094435.GU6003@pengutronix.de> <20211222104036.GY6003@pengutronix.de> <04982df2-29a0-86d5-d4a8-05826916d9a0@arm.com> MIME-Version: 1.0 In-Reply-To: <04982df2-29a0-86d5-d4a8-05826916d9a0@arm.com> X-Cookie: Weekend, where are you? X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211222_052515_239601_FFAD9334 X-CRM114-Status: GOOD ( 16.98 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1554401778780740846==" Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org --===============1554401778780740846== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="zggLzLdOTF69soBF" Content-Disposition: inline --zggLzLdOTF69soBF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Dec 22, 2021 at 01:19:23PM +0000, Robin Murphy wrote: > On 2021-12-22 13:00, Mark Brown wrote: > > Does the SoC actually support the supply being completely off in > > operation? A lot of devices want everything powered even if idle during > > full operation since keeping voltage differentials smaller makes it a > > lot easier to design to avoid leakage current type issues at the points > > where the different power domains connect. > I don't know TBH - the available documentation doesn't seem to go into quite > that much detail. In that case I would tend to assume that unless otherwise stated it's safer to keep the supply enabled when everything else is enabled. It's the default thing and so is more likely to be what was designed for and less likely to result in nasty surprises. --zggLzLdOTF69soBF Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmHDJzQACgkQJNaLcl1U h9B5Uwf+PGxf90Ah1ffK8JJue0F+xHrIeiq7HnTcYV88RCtyo3DSP4OW0e+y50/g t/iHKnSAWj3GiPoXV60IBHMnG8scDITZtOtHa4nx6EcLtcnElq2O+CTJ6Rwi7BpH SjbhBNEipsTnRRibN7gvYee+veoBpTWP53a938GjROC6KhqVCWwTGh3oHaDVQ7Z2 EKloD8RwWBQhKap3xPeJgJ7YgNM4Z6RVPmh3sO7sx4kxiUbDDlsKz5/eYQj4xz49 p/yKYS39lAIbcLck9X3aIlhP6u60I0WPnB+3sovH9iDjBoNWdDr4MVv+OLReowWM s41eUqfK87zkzJEesIkj9sTaaP2ERw== =I9dn -----END PGP SIGNATURE----- --zggLzLdOTF69soBF-- --===============1554401778780740846== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip --===============1554401778780740846==-- 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CE109C433F5 for ; Wed, 22 Dec 2021 13:29:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=lQPljjSxdOj7ryqvFYvneK3qvTPOTixVFBfcbr/aBic=; b=w088JvmVvsQYUgIEBGP89reeLG jV34kysk7rKZYT/FWxPfePtlNQVAOnMVpz7VXqSxJC66/pm9CLn2pk3DdjMewesiLmKIjC4bp74wP Y1t5RovxwtuzvZmeMvPTZQSZvjSOg676DOdo3crRrTndsC87t9jTsLQ9T4w2uw5YnT62roIYx6U46 m5N6GCywvMKPS3FNyYIIQ57WLAPyw4209v4RqeNx/uAwNdARZTh2ZyCmEdC+kKfXQ4y45/QfZnOAs d+Ii2hqXK9rmmN/Dyq51QktsuanevFjYb0WTSUF1fkd/AasNfJyrXQL7INLrE0dhZw9+vSpEWFH9U RwUYI+zA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n01fA-00AWd7-5U; Wed, 22 Dec 2021 13:28:13 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n01cJ-00AVNF-3u; Wed, 22 Dec 2021 13:25:16 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 963A061A3D; Wed, 22 Dec 2021 13:25:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4EF00C36AE5; Wed, 22 Dec 2021 13:25:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1640179514; bh=nR4xwe4dlsBLj6hoxeOrNguo8C1T2r8S9EvD4cqoYlc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gWNSYl5i1ra1dNgISHgtC/Ragblm/DAknFB57eZaEafCfjjVWvodrwg1SsvJ1EUs5 0bYQGFHpXqruURx4ecn0i9vy8vC/iEjSlEKlRZ+saNGCISdttKgn14QqCd1xHTGAL0 TauJzz+4SIBYRBGRYdGGzCoSftZNMqNuA0+I6sCIPCHb0u+4vJs9I8clnLIkpMaFX2 hn4Xvni54eeMAZilGJyF+6dIIueV/S6Rnb5unXixZsLkgRQ2/+cb4JPXPeqoUbv+pJ 5/xurOSxPRSYqdlRgXOA1zN+rBXL4yf2fW6T5E/+N/Q0ugbgbQqtbciMVJMk/RJ4vU FT8unVeln4UWg== Date: Wed, 22 Dec 2021 13:25:09 +0000 From: Mark Brown To: Robin Murphy Cc: Sascha Hauer , linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Heiko Stuebner , Michael Riesch , kernel@pengutronix.de Subject: Re: [PATCH 3/4] soc: rockchip: power-domain: Add regulator support Message-ID: References: <20211217130919.3035788-1-s.hauer@pengutronix.de> <20211217130919.3035788-4-s.hauer@pengutronix.de> <20211220094435.GU6003@pengutronix.de> <20211222104036.GY6003@pengutronix.de> <04982df2-29a0-86d5-d4a8-05826916d9a0@arm.com> MIME-Version: 1.0 In-Reply-To: <04982df2-29a0-86d5-d4a8-05826916d9a0@arm.com> X-Cookie: Weekend, where are you? X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211222_052515_239601_FFAD9334 X-CRM114-Status: GOOD ( 16.98 ) 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: , Content-Type: multipart/mixed; boundary="===============8543219747216519932==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============8543219747216519932== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="zggLzLdOTF69soBF" Content-Disposition: inline --zggLzLdOTF69soBF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Dec 22, 2021 at 01:19:23PM +0000, Robin Murphy wrote: > On 2021-12-22 13:00, Mark Brown wrote: > > Does the SoC actually support the supply being completely off in > > operation? A lot of devices want everything powered even if idle during > > full operation since keeping voltage differentials smaller makes it a > > lot easier to design to avoid leakage current type issues at the points > > where the different power domains connect. > I don't know TBH - the available documentation doesn't seem to go into quite > that much detail. In that case I would tend to assume that unless otherwise stated it's safer to keep the supply enabled when everything else is enabled. It's the default thing and so is more likely to be what was designed for and less likely to result in nasty surprises. --zggLzLdOTF69soBF Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmHDJzQACgkQJNaLcl1U h9B5Uwf+PGxf90Ah1ffK8JJue0F+xHrIeiq7HnTcYV88RCtyo3DSP4OW0e+y50/g t/iHKnSAWj3GiPoXV60IBHMnG8scDITZtOtHa4nx6EcLtcnElq2O+CTJ6Rwi7BpH SjbhBNEipsTnRRibN7gvYee+veoBpTWP53a938GjROC6KhqVCWwTGh3oHaDVQ7Z2 EKloD8RwWBQhKap3xPeJgJ7YgNM4Z6RVPmh3sO7sx4kxiUbDDlsKz5/eYQj4xz49 p/yKYS39lAIbcLck9X3aIlhP6u60I0WPnB+3sovH9iDjBoNWdDr4MVv+OLReowWM s41eUqfK87zkzJEesIkj9sTaaP2ERw== =I9dn -----END PGP SIGNATURE----- --zggLzLdOTF69soBF-- --===============8543219747216519932== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============8543219747216519932==--