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 84E4BC77B73 for ; Tue, 25 Apr 2023 19:24:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234983AbjDYTYk (ORCPT ); Tue, 25 Apr 2023 15:24:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235711AbjDYTYZ (ORCPT ); Tue, 25 Apr 2023 15:24:25 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27F7818EB6; Tue, 25 Apr 2023 12:24:16 -0700 (PDT) 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 C65E76313E; Tue, 25 Apr 2023 19:24:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAE25C4339B; Tue, 25 Apr 2023 19:24:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1682450655; bh=WqHhwYZkfR8EDEKqGRF5aPIvBjQ7WTC1wmxO9XyL0/g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NiWg8PviVhTTSVXubSeYdzZPc99PeYtbJmMhd6bDcJWaRIgsrSnlYdKM72vPY5WBy Ayla3GJ+jFu0sFz1SMPV0zsjZG1yJ0cqkBqGPRdz3BmkB6KCFQLmXnd4te/xd56zQ0 bsJCttYYbBjK463RqxMdFd4DDieOftDM8LfS8OiOwrHmSFthKE383mvnosXCRhFoS7 4N8cxpF2ypBdau5K5NjFG6Wj43zQyuCVsj9MdUwlFCnPwly9j9HlZrZNEC/gc/WFpl r0+tsXZiwSAKa5GlkWofX/vwDhajhhUOrwcXhZUaCl7VLSe4cuGzhcZJylprc8B5/X 0LM3tm5//3RQQ== Date: Tue, 25 Apr 2023 21:24:11 +0200 From: Wolfram Sang To: Rob Herring Cc: Tomi Valkeinen , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, Krzysztof Kozlowski , Luca Ceresoli , Andy Shevchenko , Matti Vaittinen , Laurent Pinchart , Mauro Carvalho Chehab , Peter Rosin , Liam Girdwood , Mark Brown , Sakari Ailus , Michael Tretter , Hans Verkuil , Mike Pagano , Krzysztof =?utf-8?Q?Ha=C5=82asa?= , Marek Vasut , Satish Nagireddy , Luca Ceresoli , Andy Shevchenko Subject: Re: [PATCH v11 1/7] i2c: add I2C Address Translator (ATR) support Message-ID: Mail-Followup-To: Wolfram Sang , Rob Herring , Tomi Valkeinen , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, Krzysztof Kozlowski , Luca Ceresoli , Andy Shevchenko , Matti Vaittinen , Laurent Pinchart , Mauro Carvalho Chehab , Peter Rosin , Liam Girdwood , Mark Brown , Sakari Ailus , Michael Tretter , Hans Verkuil , Mike Pagano , Krzysztof =?utf-8?Q?Ha=C5=82asa?= , Marek Vasut , Satish Nagireddy , Luca Ceresoli , Andy Shevchenko References: <20230421101833.345984-1-tomi.valkeinen@ideasonboard.com> <20230421101833.345984-2-tomi.valkeinen@ideasonboard.com> <20230425171347.GB1957523-robh@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="BXyp5TPXXYIx2AXH" Content-Disposition: inline In-Reply-To: <20230425171347.GB1957523-robh@kernel.org> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org --BXyp5TPXXYIx2AXH Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > We do support some flags in the upper 16-bits of I2C addresses. Any of=20 > those possibly needed here? I2C_OWN_SLAVE_ADDRESS definately not. ATR is only for addresses on the remote bus while our own address is on the local bus. I2C_TEN_BIT_ADDRESS, only in theory. I have never seen a 10-bit address in the wild, so extremely unlikely that ATR hardware does support it. But then again, there is a slight chance that we add more flags in the future which might be relevant for ATR? So, u32 is probably a good thing to use nonetheless. --BXyp5TPXXYIx2AXH Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmRIKNcACgkQFA3kzBSg Kba9kBAAoXLpnt2btqw4dEDjJLtIAQyuM4KlutOsE46L+ZiOwPM9DOBHhbLVyilG qFQqvT+96nHTFpUnQ/MC/mpFFZ9TPG86QGirha1pplDS0hocYsvbFN7OxxLAnoDy xDxRFoHA0fFLV4tzL97s/Jl6Ka6L1ubDHcg3drun38HzFkNJEd8hqG3tJNeSfo0u 3F3LLPowCScp+oYlBw/SRXh9L8wmUkqegiDYVXf6TUfwevbBMCdhxVNEF06FA/MY f4wcZaGAgTuSJjSbUaCKuKT/mLIoI93z5YczpFHrcj4Pr8LZKggb0V5hqMAEhk4W WQUd9UxED5WMTcTK+/Jf7xSBM2qzTrpgwsOhv7bRlbSARimHjECU9uQUmYlFSFas QEs4MITjUxOmcS10hB/OJN5HBWfAC+fmCkXUMDDLMZT/DN+nosTUGwWYqMv7aouB HmfOagM83z5RkWnE7meR4qTx1UygnCNHJemm6MdaurVlsOeuk9LpFOP3EtEmUqWH KTTDJvaRFiMZxKZz3Y7/Dz/cGM5deKnMiY5goTyyK8eTqNhfqBGxlygmX6YV80yL LA/7tt4eZAW/qtO6SAssIuT13nuWNR5aRS9q3G0ZzaC42eHy1KoPr+EsStpR17Fm KELYexy53yT45oza3vXSj4M6oRbF+FRxl2Jwtj+rZhtEgKxjlj4= =Ao+h -----END PGP SIGNATURE----- --BXyp5TPXXYIx2AXH--