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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_MUTT 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 A176EC04AAC for ; Mon, 6 May 2019 07:37:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AC23204FD for ; Mon, 6 May 2019 07:37:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557128265; bh=/l8jqohquRf1w21bmzWUYO4PKKiiQd+E4G01VKTDYOg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=vXMYOo3tQN4Vu1E0MZ83MowvaIv+byz9vnya23mCCmFvQK9ZzumUiWYkevnZGrBiL do0WSTydf2bgwE2RnKDMMUIqA+wHd5utgag1mwibAlpvov7+AFDIuj/t2tsiz0XvtX 8HCHalnKfQ/ivd9fx/9n0GixrqG+5Hjv+WkLUQLE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726298AbfEFHho (ORCPT ); Mon, 6 May 2019 03:37:44 -0400 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:38842 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725846AbfEFHhn (ORCPT ); Mon, 6 May 2019 03:37:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Ml4uJzXcGzydWf79ydXHif8mbv/MfKjBeSGO2rM7E+g=; b=DwMEcOpnMtddv14wrkldHEyB+ hF4fks1qiB5DJ7lI1MC/QJ8Esa52mK+osjDFyyJpEL0lK+dKFPvL+RRZVN8jY4kz6yijQKF5GQOjX CUQ+0Hkw9MpBZ6xzGOHuRcj8hAF+GQrrTtmpF+qypulZ1LX3tpLkwvIN2DnCEtwjdx7oU=; Received: from kd111239184067.au-net.ne.jp ([111.239.184.67] helo=finisterre.ee.mobilebroadband) by heliosphere.sirena.org.uk with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hNYBt-0000s5-BM; Mon, 06 May 2019 07:37:37 +0000 Received: by finisterre.ee.mobilebroadband (Postfix, from userid 1000) id DFBC3440040; Mon, 6 May 2019 05:49:16 +0100 (BST) Date: Mon, 6 May 2019 13:49:16 +0900 From: Mark Brown To: Sowjanya Komatineni Cc: "thierry.reding@gmail.com" , Jonathan Hunter , Timo Alho , "robh+dt@kernel.org" , "mark.rutland@arm.com" , Krishna Yarlagadda , Laxman Dewangan , "linux-tegra@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-spi@vger.kernel.org" , "devicetree@vger.kernel.org" Subject: Re: [PATCH V3 3/9] spi: add SPI_LSBYTE_FIRST mode Message-ID: <20190506044916.GO14916@sirena.org.uk> References: <1555363834-32155-1-git-send-email-skomatineni@nvidia.com> <1555363834-32155-4-git-send-email-skomatineni@nvidia.com> <20190419152208.GT2803@sirena.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="AoBLyXwWXtFbU0pZ" Content-Disposition: inline In-Reply-To: X-Cookie: -- I have seen the FUN -- User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --AoBLyXwWXtFbU0pZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sat, Apr 27, 2019 at 12:32:58AM +0000, Sowjanya Komatineni wrote: > > On Mon, Apr 15, 2019 at 02:30:28PM -0700, Sowjanya Komatineni wrote: > > This is byte ordering as opposed to bit ordering which the core > > already supports. Do you have any examples of devices that need > > this or is it just being added for completeness? If devices are > > going to rely on this we probably need emulation > support in the > > core I guess given that this is a pretty unusual controller feature. > Current upstream platforms have no specific device requirement but > added this feature as Tegra support it for specific requirements of > some slaves. Do we have any examples of such devices? In any case I think the main thing here would be a software implementation of the feature so that drivers can use it sensibly - at the minute they'd have to provide code to work without the feature anyway and it seems like a relatively small optimization for most things. > [Changed mail client message format word wrap limit to 74 columns] It's not working, and it's also mangling quoted sections of the mail too. --AoBLyXwWXtFbU0pZ Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAlzPvMwACgkQJNaLcl1U h9BhdAf+KaNn14IkNGm8rJREfmZNBQNH91xi4m0l7rxa6aW9c9YwozOM6cKxPdyR LRhdsAMvfNxCdosH7hrOPptQgEsAudA3+JVIwnhOuhFkkBmqfeNlc2/HUQIoXkKr +RIH1nJJA9bxD0Z5u2x7wAt1F4bQ6EQ1kb0oSSuHThMI7WI5u7y3kafC/gUctwzB JeU9TplFlzXmGLHkve6berLhGmZOvZ+bnOPHC7H0FlGScV6M6qk9sw7zxt6zxPF9 Aw9KSh05HPZ5aCYz/4kYBGYf7K+w97bjpUxX73idvJeXauzklnVgAnaq2S1JZf8q hUny8YE9djcs/IQXidQFluYReixJDA== =8Pu3 -----END PGP SIGNATURE----- --AoBLyXwWXtFbU0pZ--