From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from vps0.lunn.ch (vps0.lunn.ch [156.67.10.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0FAE1341AAE; Fri, 14 Nov 2025 17:39:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.67.10.101 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763141956; cv=none; b=C9qtZnMfdCsOX0wxOkyD1ai9DYQdQL3vJItRqK8Ow8XUKbVb4HFYrJXmhgqreMFKaDruVAOcvppsqptEh6AaglS9XvfYo27kM/Ez1cPMWEJRy03x+P4XhJRUyqUl9LIUz5rc5YyLjsAZluYvuchDkdjM8V9ajVC6FomRn0wOR6g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763141956; c=relaxed/simple; bh=6RrGHT2bPSbv3oW/d6l3Th3a8/G2DqdfYt9P09MdriI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=bTpPt4YYmYVMgMCIPH5zdmSACWYUY01pBpGu3ZudtF6ozHesTLfSNAj/k90AMFlm16NqdSdfQjNf1rmuSU5OsT6ntKhO5IZVW6XUyA5tSTQW8naEkV3xUU6VUV2lz81IYNIvHZzD9EXetetn6qMORMCLk48Y8OT1Y8FMZGNOEGM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lunn.ch; spf=pass smtp.mailfrom=lunn.ch; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b=4kpHF5tY; arc=none smtp.client-ip=156.67.10.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lunn.ch Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lunn.ch Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="4kpHF5tY" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Disposition:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:From:Sender:Reply-To:Subject: Date:Message-ID:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Content-Disposition:In-Reply-To:References; bh=6Ck6SOmONUUBFapcwaTAajZaO0W9Pz5IV9Dw+0dnbis=; b=4kpHF5tYp2Yz6vjrWw3CUwrXXh l8dl4e4oNdfuSFYI3a9N/QON/D4BNgazftXzA980LfiWzTzWj6UouLxL25prrHnradLIQ/H6sD/tU MJmUMRGukz9tVd1T79/2VyjYGixXBJpnmKrIjPbr7PRr+aL8yrboMKZjninYXpB5HBvE=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1vJxlH-00E0Yl-B0; Fri, 14 Nov 2025 18:39:03 +0100 Date: Fri, 14 Nov 2025 18:39:03 +0100 From: Andrew Lunn To: Shenwei Wang Cc: Linus Walleij , Bjorn Andersson , Mathieu Poirier , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Jonathan Corbet , Bartosz Golaszewski , Pengutronix Kernel Team , Fabio Estevam , Peng Fan , "linux-remoteproc@vger.kernel.org" , "devicetree@vger.kernel.org" , "imx@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" , dl-linux-imx Subject: Re: [PATCH v5 3/5] docs: staging: gpio-rpmsg: gpio over rpmsg bus Message-ID: <1b39ba56-e38c-4661-9973-b56fdaa1bcae@lunn.ch> References: <20251104203315.85706-1-shenwei.wang@nxp.com> <20251104203315.85706-4-shenwei.wang@nxp.com> <9bcd63d2-f75f-4cb6-a81f-eefc983a99bb@lunn.ch> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Nov 12, 2025 at 04:31:52PM +0000, Shenwei Wang wrote: > > > > -----Original Message----- > > From: Andrew Lunn > > Sent: Wednesday, November 12, 2025 7:42 AM > > To: Shenwei Wang > > Cc: Linus Walleij ; Bjorn Andersson > > ; Mathieu Poirier ; Rob > > Herring ; Krzysztof Kozlowski ; Conor > > Dooley ; Shawn Guo ; Sascha > > Hauer ; Jonathan Corbet ; Bartosz > > Golaszewski ; Pengutronix Kernel Team > > ; Fabio Estevam ; Peng Fan > > ; linux-remoteproc@vger.kernel.org; > > devicetree@vger.kernel.org; imx@lists.linux.dev; linux-arm- > > kernel@lists.infradead.org; linux-kernel@vger.kernel.org; linux- > > doc@vger.kernel.org; dl-linux-imx > > Subject: [EXT] Re: [PATCH v5 3/5] docs: staging: gpio-rpmsg: gpio over rpmsg bus > > > > Since this has not been merged yet, there are no existing systems. > > > > In this context, "system" refers to both Linux and the remote firmware. The remote firmware > for i.MX platforms has already been released and widely used by our customers. Maintaining > compatibility with the existing firmware would provide a better solution for customers. >From what i understand, this is not just GPIO. There is also I2C? And RTC? I would expect a generic implementation of these as well? I find it unlikely you can persuade all these subsystem Maintainers to accept your protocols as is. You need to make changes so that GPIOs interrupts work correctly, so i would just accept you need to change the firmware. And i've given you a way you can keep backwards compatible to your out of tree driver... Andrew