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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=BX9+oiU9NUzGK1+aV9/Uah0G+lhW9/DtCwBAHxWnn3I=; b=uaHmbNI+fHWgYYRGZ/vrLituSI6l2iSFLq4EwM5G1NMTrrH1o0mvO2mn5kyOzE/26h 1J27xxEyThzRnUzlbkn4d8+E2m6Tj53sidS9dT6hbWkX+FdLdgYsVbPXC5MysvkFZ9aZ +8fYXM7BnfrvGduD7cv4qkePBj4f4dLngNssUGMA5cf1EHc7WEzPCqCqzFmrG7dVOe56 VMKT+LyXLd+mcrrlLG3ZdQIewwmNC0XniR3l2CNav2mj72a+7rEON7OtBmu/3rxsTTYt blkEoQhwNF9hNiKUnHWTQhAK1VVpiWIMaML6KrD5xfzOhcd8zYu75IZEiH5qckVCrY5Q /Z+w== X-Gm-Message-State: APjAAAXQrA9GZR/2Bt6syu/PJkJRc0Za0Mpjrg9s9S6IPUtdZCHiv54w VWpoHI0CACsZBK5hLhvt1FZBQoPQZOfCEss5N1w= X-Google-Smtp-Source: APXvYqwRxzwlvasanDAZCzqmiAcIi+8du+kTb0XmBWuXgm+lcYoRDBqJdLFMRLpwiKeOks5taARgUtmAle4aHBvqjI0= X-Received: by 2002:aca:ddc2:: with SMTP id u185mr185041oig.24.1582156697455; Wed, 19 Feb 2020 15:58:17 -0800 (PST) MIME-Version: 1.0 References: <20200215065826.739102-1-gch981213@gmail.com> <20200218125557.GD4232@sirena.org.uk> In-Reply-To: <20200218125557.GD4232@sirena.org.uk> From: Chuanhong Guo Date: Thu, 20 Feb 2020 07:58:06 +0800 Message-ID: Subject: Re: [PATCH 0/2] rewrite mtk-quadspi spi-nor driver with spi-mem To: Mark Brown X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200219_155819_225081_D5BA6EAD X-CRM114-Status: GOOD ( 12.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Vignesh Raghavendra , Richard Weinberger , open list , linux-spi@vger.kernel.org, Rob Herring , linux-mtd@lists.infradead.org, Miquel Raynal , Matthias Brugger , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi! On Tue, Feb 18, 2020 at 8:55 PM Mark Brown wrote: > This is an ABI break so you shouldn't be doing this, if the existing > binding works it should continue to work. The missing spi-max-frequency is the only part preventing old device tree to work with this driver. If the goal is to make existing dt binding work, I could patch dt using of_add_property in v2. I saw similar device tree patching for legacy bindings in pinctrl-single driver. > > > 3. removing the old driver. I'll create this commit after 1 and 2 are > > applied to avoid possible rebasing due to any changes in the old > > driver. > > This isn't great as it means we have a period with two drivers for the > same thing in tree which is at best going to be confusing. There's no > advantage to splitting this out. Got it. I'll add this patch in v2. -- Regards, Chuanhong Guo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel