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 79FCEC05027 for ; Thu, 26 Jan 2023 10:51:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236820AbjAZKv4 (ORCPT ); Thu, 26 Jan 2023 05:51:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235298AbjAZKvw (ORCPT ); Thu, 26 Jan 2023 05:51:52 -0500 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25BFF45F45; Thu, 26 Jan 2023 02:51:36 -0800 (PST) Received: from pendragon.ideasonboard.com (213-243-189-158.bb.dnainternet.fi [213.243.189.158]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 127222B3; Thu, 26 Jan 2023 11:51:33 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1674730294; bh=+PfsfHyLWhCatjzWDNhxpQaIrl5B/XJVdTmRgf6Njdw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=R5BaBqjvwgTFzVDK2Aa2Li6JQDcOo0DLdDE+pdrkVZG4CQMRlaZD6XzCEKEtqL5XP EMRN5ecbZJ3eQbSFFanEzTSWM499vOirXIwx7KnO/Eb9+xwRObeqe6ww+7sEEPvZ/o p86M0muxFq2M2VT0UdH7ziatX3egnn6CFTiCgFTo= Date: Thu, 26 Jan 2023 12:51:30 +0200 From: Laurent Pinchart To: Andy Shevchenko Cc: Tomi Valkeinen , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Wolfram Sang , Luca Ceresoli , Matti Vaittinen , Mauro Carvalho Chehab , Peter Rosin , Liam Girdwood , Mark Brown , Sakari Ailus , Michael Tretter , Shawn Tu , Hans Verkuil , Mike Pagano , Krzysztof =?utf-8?Q?Ha=C5=82asa?= , Marek Vasut Subject: Re: [PATCH v7 5/7] media: i2c: add DS90UB960 driver Message-ID: References: <4286abe2-f23f-d4c9-ef18-f351af7a3a8b@ideasonboard.com> <5d208710-f284-e6e9-18dc-f5ef63a9ea44@ideasonboard.com> <04a82b08-524f-8d03-ac47-73d826907fc3@ideasonboard.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 26, 2023 at 12:21:06PM +0200, Andy Shevchenko wrote: > On Thu, Jan 26, 2023 at 10:41:47AM +0200, Tomi Valkeinen wrote: > > On 25/01/2023 17:27, Andy Shevchenko wrote: > > ... > > > > But I probably don't understand the ATR structure and what exactly we need to > > > pass to it, perhaps it also can be replaced with properties (note, that we have > > > some interesting ones that called references, which is an alternative to DT > > > phandle). > > > > Well, maybe this needs a Linux bus implementation. I'm not that familiar > > with implementing a bus, but I think that would make it easier to share data > > between the deserializer and the serializer. A bus sounds a bit like an > > overkill for a 1-to-1 connection, used by a few drivers, but maybe it > > wouldn't be too much code. > > Have you looked at auxiliary bus (appeared a few releases ago in kernel)? As far as I understand, the auxiliary bus infrastructure is meant for use cases where a single hardware device needs to be split into multiple logical devices (as in struct device). Platform devices were historically (ab)used for this, and the auxiliary bus is meant as a cleaner solution. I'm not sure if it would be a good match here, or if it would be considered an abuse of the auxiliary bus API. -- Regards, Laurent Pinchart