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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AFAFC7EE22 for ; Tue, 9 May 2023 10:20:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229519AbjEIKUz (ORCPT ); Tue, 9 May 2023 06:20:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235041AbjEIKUy (ORCPT ); Tue, 9 May 2023 06:20:54 -0400 Received: from mail.zeus03.de (www.zeus03.de [194.117.254.33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BA39D2D4 for ; Tue, 9 May 2023 03:20:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= date:from:to:cc:subject:message-id:references:mime-version :content-type:in-reply-to; s=k1; bh=P6Olt4QFOU/QFInNW9J3fmj152gv eLBp7EYTA0uPfnw=; b=wKVbIUQGfL7aLUupwIJYjPd5j8MZ2Vbvpk4Cm+9raVVZ eCKQWmwF/v2R+nl+a6y5ThnCuq4h9d/mbTCiYt0SvAQijvywVFtEtyAUdY3rN+lZ uz2XTu8xvyM5j8IgxvuAzpyH7WGzLC2jA92keVlpB03AdUQQMBnVyr+fWGLLCKI= Received: (qmail 2038819 invoked from network); 9 May 2023 12:20:46 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 9 May 2023 12:20:46 +0200 X-UD-Smtp-Session: l3s3148p1@IXbPG0D7WL0ujnsI Date: Tue, 9 May 2023 12:20:46 +0200 From: Wolfram Sang To: Geert Uytterhoeven Cc: linux-renesas-soc@vger.kernel.org, Marek Vasut , Yoshihiro Shimoda , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 2/3] PCI: rcar-host: add support for optional regulators Message-ID: Mail-Followup-To: Wolfram Sang , Geert Uytterhoeven , linux-renesas-soc@vger.kernel.org, Marek Vasut , Yoshihiro Shimoda , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org References: <20230508104557.47889-1-wsa+renesas@sang-engineering.com> <20230508104557.47889-3-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="DvudHUKh+55nlmsU" Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org --DvudHUKh+55nlmsU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > I don't know if PCIe specifies some ordering w.r.t. power supply > enablement. I found this which is good enough for me: "There is no requirement for supply sequencing in either PCI Express or PCI Express Mini Card; the supplies may come up or go down in any order." [1] Thanks, Linear Technology! [1] https://www.analog.com/media/en/reference-design-documentation/design-notes/dn346f.pdf --DvudHUKh+55nlmsU Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmRaHnoACgkQFA3kzBSg KbaGsg/+KdqT90l9mzXpWEtpc9NGGpXyONO9E3Y7Xqdipr0RaQRZ2N8THpD90hTR fmk3yZq6H9KPN6ZaUcLmRYoBUy9zV39I4i+MGB44rZEdpETlmZdOPhMHPKQhnmCz QSEPEeVzjrG8Ag0oqLpQEtHCXCVmzjoK0he/eJ0f09Dq5HPbZQafDedNJE9fhuOD uZbN2md+5ZW+Hauc6StzAPKgv1Whm9XOn8lmSVtVPqr3nyvmi28LOWvR2fz4nnkB nvKFLSNolH4baL2D8GnO5ArCjuHl/MpROYbL0EhGyDWkbsrMdfbvaomUscdtgxpT BxIZdlCndtz8o6NDBg9/cOYWyMADZfzo2GIgRQFln9eezTmFiHYlHpjvMMd1D7yZ RIEvmbrD9ldOyZCY3WrkHcy52IfY+KvI8HAzjAtK/Obb1HqH3uf2HCUfl2HNV/oG /n5/QSOWY0euRuzcesH5Ntfl6MkIEpIQ3CNa4dq5bbb9GcDvJ4uwBjCELtuiPBfh s3oq9wPc8wyH86NfyhJ25kEhTY2aZ5dLQ33OXqekEQtmoeuymfEWQVAYGi+Q4XPE sK54gPMZ6XESGL84t5VnaqeBRQXk3lLCqPySJBlNG7Gw9gKMNG7oWJgr3gbnjzBz KcY77ELwSf4MXXthI8yBlvi58/ZCws49cnLjHh/e/a+Wp3sVjyA= =XPyg -----END PGP SIGNATURE----- --DvudHUKh+55nlmsU--