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=-8.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 226BCC4346E for ; Tue, 29 Sep 2020 09:43:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4AF720848 for ; Tue, 29 Sep 2020 09:43:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727759AbgI2Jni (ORCPT ); Tue, 29 Sep 2020 05:43:38 -0400 Received: from mga06.intel.com ([134.134.136.31]:60896 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727698AbgI2Jni (ORCPT ); Tue, 29 Sep 2020 05:43:38 -0400 IronPort-SDR: DpmdmpR2lLfoLZxB+Xdy9FwIrvjsmBah1zk8mXEu5yA2kfV9Dnr1e4fSA6ffO9nRWY5WSRgy0r d4f1NoyCtS2w== X-IronPort-AV: E=McAfee;i="6000,8403,9758"; a="223742650" X-IronPort-AV: E=Sophos;i="5.77,318,1596524400"; d="scan'208";a="223742650" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2020 02:43:37 -0700 IronPort-SDR: WD+qoWE6LnEug60anhMsY7vQb4O4gTo65GPfZn61dErp8MTX4B/kTRUq4L18GR2r2Fb8ixAJRC l/GNr7w3c9mg== X-IronPort-AV: E=Sophos;i="5.77,318,1596524400"; d="scan'208";a="307697837" Received: from paasikivi.fi.intel.com ([10.237.72.42]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2020 02:43:33 -0700 Received: by paasikivi.fi.intel.com (Postfix, from userid 1000) id C5BB2204FD; Tue, 29 Sep 2020 12:43:00 +0300 (EEST) Date: Tue, 29 Sep 2020 12:43:00 +0300 From: Sakari Ailus To: Krzysztof Kozlowski Cc: Mauro Carvalho Chehab , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v4 1/4] dt-bindings: media: imx258: add bindings for IMX258 sensor Message-ID: <20200929094300.GI26842@paasikivi.fi.intel.com> References: <20200923152129.21736-1-krzk@kernel.org> <20200929091512.GF26842@paasikivi.fi.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Tue, Sep 29, 2020 at 11:18:46AM +0200, Krzysztof Kozlowski wrote: > On Tue, 29 Sep 2020 at 11:15, Sakari Ailus wrote: > > > > Hi Krzysztof, > > > > On Wed, Sep 23, 2020 at 05:21:26PM +0200, Krzysztof Kozlowski wrote: > > > Add bindings for the IMX258 camera sensor. The bindings, just like the > > > driver, are quite limited, e.g. do not support regulator supplies. > > > > > > Signed-off-by: Krzysztof Kozlowski > > > > > > --- > > > > > > Changes since v3: > > > 1. Document also two lane setup. > > > > > > Changes since v2: > > > 1. Remove clock-frequency, add reset GPIOs, add supplies. > > > > Oops. I missed this one. > > > > How does the driver know the appropriate clock frequency for the platform > > if it's not in DT? The sensor supports a range of frequencies, not a single > > frequency. > > > > Could you add clock-frequency back? > > Not really, it was removed on Rob's request. The bindings do not > describe driver's behavior so how the driver gets frequency should not > be part of the bindings. Also it's not a real problem - the driver > just calls clk_get_rate(). Btw. we also have this nowadays: Documentation/driver-api/media/camera-sensor.rst . -- Sakari Ailus