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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 36326C433DB for ; Wed, 6 Jan 2021 11:08:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E01FF23104 for ; Wed, 6 Jan 2021 11:08:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726483AbhAFLHe (ORCPT ); Wed, 6 Jan 2021 06:07:34 -0500 Received: from new4-smtp.messagingengine.com ([66.111.4.230]:43431 "EHLO new4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726098AbhAFLHd (ORCPT ); Wed, 6 Jan 2021 06:07:33 -0500 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id B5B995812B2; Wed, 6 Jan 2021 06:06:46 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute6.internal (MEProxy); Wed, 06 Jan 2021 06:06:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h= date:from:to:cc:subject:message-id:references:mime-version :content-type:in-reply-to; s=fm1; bh=pKsVdMArbxuwwiMUH/SwaIc1g1Q g7FH/nG0HUKbrznA=; b=jscJijtSsOzPb964OVCl9N7lQ90TfXpDTLUjmE/dONb GqJJW9/mW0wQ1/gw/VgMH8+hNRq1AkRR/37mdBMKcYawX7tnWl34cchoLkWpnpVg aZ2yy9iYAldGC2XKxg2yEhnMOa+It24zZ+bztZifXjqnyPU7Agiudf+NntcqVdaa syI48334WbSofOidM2Dku2tDGgH6EX3wCUSTnXFlMDsU46nrSCcLP80jbemAZ4W/ xDTHiKPgmwySISq7gVbqsCaFdIHkRBKrs1CdDGPFQOzQVRXNGlxPADo36zUU953u EvKdHmOqN+fRPxd/QSpzo/EZrNC384bEgAC4qU0RLEw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=pKsVdM ArbxuwwiMUH/SwaIc1g1Qg7FH/nG0HUKbrznA=; b=ROJ2Iw57s6rFnp4ratvReo EqsTahyop2RTg7SQMq2pH2HBBOmNLi8M3lkh9ARNhbcC6sTbY4TzdIbl5VVi8Agq 8g4xf7lO54H9HtyyJzpNDqc2DTdT3aBqJbEik6tyHmKLNEVOob3WTTrvhKm7Sp88 65JP2BNPreSnUgMKxcYtToZUeDjI5ot2xxCy7eJX9ccbhAlYe5NHvrFnUK6QIPb5 qQKSJSDzcGOugmSK/KQEi6jbi3d9eMBWysDFv9xh2z/Tg2k0GswGhFXfrBN2QHUR yAZ53mj/Go+/ODOQV9U3VV4scplefOETZl0CF29jc7eL0PN3eHeCdXLGAfWhRfeA == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrvdefledgvdehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepfffhvffukfhfgggtuggjsehgtderredttddunecuhfhrohhmpeforgigihhm vgcutfhiphgrrhguuceomhgrgihimhgvsegtvghrnhhordhtvggthheqnecuggftrfgrth htvghrnhepuddvudfhkeekhefgffetffelgffftdehffduffegveetffehueeivddvjedv gfevnecukfhppeeltddrkeelrdeikedrjeeinecuvehluhhsthgvrhfuihiivgeptdenuc frrghrrghmpehmrghilhhfrhhomhepmhgrgihimhgvsegtvghrnhhordhtvggthh X-ME-Proxy: Received: from localhost (lfbn-tou-1-1502-76.w90-89.abo.wanadoo.fr [90.89.68.76]) by mail.messagingengine.com (Postfix) with ESMTPA id A5F901080068; Wed, 6 Jan 2021 06:06:44 -0500 (EST) Date: Wed, 6 Jan 2021 12:06:43 +0100 From: Maxime Ripard To: =?utf-8?B?QW5kcsOp?= Przywara Cc: Samuel Holland , Chen-Yu Tsai , Jernej Skrabec , Rob Herring , Michael Turquette , Stephen Boyd , Linus Walleij , Philipp Zabel , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Subject: Re: [PATCH v2 4/4] arm64: dts: allwinner: h6: Use RSB for AXP805 PMIC connection Message-ID: <20210106110643.agq3mjyhgvg3w4i6@gilmour> References: <20210103100007.32867-1-samuel@sholland.org> <20210103100007.32867-5-samuel@sholland.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="zcdfvxiqryncz7fp" Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org --zcdfvxiqryncz7fp Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 04, 2021 at 10:54:19AM +0000, Andr=E9 Przywara wrote: > On 03/01/2021 10:00, Samuel Holland wrote: > > On boards where the only peripheral connected to PL0/PL1 is an X-Powers > > PMIC, configure the connection to use the RSB bus rather than the I2C > > bus. Compared to the I2C controller that shares the pins, the RSB > > controller allows a higher bus frequency, and it is more CPU-efficient. >=20 > But is it really necessary to change the DTs for those boards in this > way? It means those newer DTs now become incompatible with older > kernels, and I don't know if those reasons above really justify this. >=20 > I understand that we officially don't care about "newer DTs on older > kernels", but do we really need to break this deliberately, for no > pressing reasons? >=20 > P.S. I am fine with supporting RSB on H6, and even using it on new DTs, > just want to avoid breaking existing ones. Doing so would also introduce some inconsistencies, one more thing to consider during reviews, and would require more testing effort. I'm not sure that stretching our - already fairly sparse - resources thin would be very wise here, especially for something that we don't have to do and for a setup that isn't really used that much. Maxime --zcdfvxiqryncz7fp Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCX/WZwwAKCRDj7w1vZxhR xZXjAQDukCQUSLlAvITRHzLuUWbe+mCBztGFHfTNBxJtobY2DQEA6uy0PngjoW4c SBgn/rWM7lobJgaKVBuQMIemlcNbFwM= =jmY+ -----END PGP SIGNATURE----- --zcdfvxiqryncz7fp--