From patchwork Thu Feb 20 19:40:30 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sylwester Nawrocki/Kernel \\(PLT\\) /SRPOL/Staff Engineer/Samsung Electronics" X-Patchwork-Id: 3689351 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4D31EBF13A for ; Thu, 20 Feb 2014 19:41:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 584A420173 for ; Thu, 20 Feb 2014 19:41:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C837E20149 for ; Thu, 20 Feb 2014 19:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754467AbaBTTlO (ORCPT ); Thu, 20 Feb 2014 14:41:14 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:19276 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753715AbaBTTlL (ORCPT ); Thu, 20 Feb 2014 14:41:11 -0500 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N1B004ZB80MSN50@mailout1.samsung.com>; Fri, 21 Feb 2014 04:41:10 +0900 (KST) X-AuditID: cbfee61a-b7fb26d00000724f-cb-53065a565dfe Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 4C.35.29263.65A56035; Fri, 21 Feb 2014 04:41:10 +0900 (KST) Received: from amdc1344.digital.local ([106.116.147.32]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N1B00BU37ZVIS60@mmp2.samsung.com>; Fri, 21 Feb 2014 04:41:10 +0900 (KST) From: Sylwester Nawrocki To: linux-media@vger.kernel.org, devicetree@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, robh+dt@kernel.org, mark.rutland@arm.com, galak@codeaurora.org, kyungmin.park@samsung.com, kgene.kim@samsung.com, a.hajda@samsung.com, Sylwester Nawrocki Subject: [PATCH v4 03/10] Documentation: devicetree: Update Samsung FIMC DT binding Date: Thu, 20 Feb 2014 20:40:30 +0100 Message-id: <1392925237-31394-5-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1392925237-31394-1-git-send-email-s.nawrocki@samsung.com> References: <1392925237-31394-1-git-send-email-s.nawrocki@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrFLMWRmVeSWpSXmKPExsVy+t9jQd2wKLZgg33tPBa31p1jtZh/BEj0 v1nIatG74CqbxdmmN+wWmx5fY7Xo2bCV1WLG+X1MFkuvX2SyaN17hN3i8Jt2VgdujzXz1jB6 XO7rZfLYtKqTzWPzknqPvi2rGD0+b5ILYIvisklJzcksSy3St0vgylj6/zpzwWWlitmtk9kb GN9IdzFyckgImEj8bHjFBmGLSVy4tx7I5uIQEpjOKHF9310WCKeDSaL33WsmkCo2AUOJ3qN9 jCC2iIC1xPEPx9hBipgFWpkkOnfcBGrn4BAWCJW4PdcZpIZFQFWifdoedhCbV8BNYtORX2Al EgIKEnMm2YCEOQXcJaYcf8gMEhYCKrn4XmsCI+8CRoZVjKKpBckFxUnpuYZ6xYm5xaV56XrJ +bmbGMEh+ExqB+PKBotDjAIcjEo8vCek2IKFWBPLiitzDzFKcDArifA22QCFeFMSK6tSi/Lj i0pzUosPMUpzsCiJ8x5otQ4UEkhPLEnNTk0tSC2CyTJxcEo1MFY5TuurPHz4boHxuTOLdqwU nSSwKcgpQu+ipHl2vMMiWS6W3vvdL8X9XuqZeHdb38i8bWNxMPu2XlVui7WTzloOh+M1m1Xc S88cjG1uu70r43LJ5qe1AVcsr1/ke1hnLfIiL/HCl5bW9DZ7MRP+y9t8n4u+Pv2kUsx50VJW L6/E9ztWJ2TMV2Ipzkg01GIuKk4EAFidce49AgAA Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-4.5 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch documents following updates of the Exynos4 SoC camera subsystem devicetree binding: - addition of #clock-cells property to 'camera' node - the #clock-cells property is needed when the sensor sub-devices use clock provided by the camera host interface; - addition of an optional clock-output-names property; - change of the clock-frequency at image sensor node from mandatory to an optional property - there should be no need to require this property by the camera host device binding, a default frequency value can ofen be used; - addition of a requirement of specific order of values in clocks/ clock-names properties, so the first two entry in the clock-names property can be used as parent clock names for the camera master clock provider. It happens all in-kernel dts files list the clock in such order, thus there should be no regression as far as in-kernel dts files are concerned. Signed-off-by: Sylwester Nawrocki Acked-by: Kyungmin Park --- .../devicetree/bindings/media/samsung-fimc.txt | 36 +++++++++++++++----- 1 file changed, 28 insertions(+), 8 deletions(-) diff --git a/Documentation/devicetree/bindings/media/samsung-fimc.txt b/Documentation/devicetree/bindings/media/samsung-fimc.txt index 96312f6..1a5820d 100644 --- a/Documentation/devicetree/bindings/media/samsung-fimc.txt +++ b/Documentation/devicetree/bindings/media/samsung-fimc.txt @@ -20,6 +20,7 @@ Required properties: the clock-names property; - clock-names : must contain "sclk_cam0", "sclk_cam1", "pxl_async0", "pxl_async1" entries, matching entries in the clocks property. + First two entries must be "sclk_cam0", "sclk_cam1". The pinctrl bindings defined in ../pinctrl/pinctrl-bindings.txt must be used to define a required pinctrl state named "default" and optional pinctrl states: @@ -32,6 +33,22 @@ way around. The 'camera' node must include at least one 'fimc' child node. +Optional properties (*: + +- #clock-cells: from the common clock bindings (../clock/clock-bindings.txt), + must be 1. A clock provider is associated with the 'camera' node and it should + be referenced by external sensors that use clocks provided by the SoC on + CAM_*_CLKOUT pins. The clock specifier cell stores an index of a clock. + The indices are 0, 1 for CAM_A_CLKOUT, CAM_B_CLKOUT clocks respectively. + +- clock-output-names: from the common clock bindings, should contain names of + clocks registered by the camera subsystem corresponding to CAM_A_CLKOUT, + CAM_B_CLKOUT output clocks, in this order. Parent clock of these clocks are + specified be first two entries of the clock-names property. + +(* #clock-cells and clock-output-names are mandatory properties if external +image sensor devices reference 'camera' device node as a clock provider. + 'fimc' device nodes ------------------- @@ -97,8 +114,8 @@ Image sensor nodes The sensor device nodes should be added to their control bus controller (e.g. I2C0) nodes and linked to a port node in the csis or the parallel-ports node, using the common video interfaces bindings, defined in video-interfaces.txt. -The implementation of this bindings requires clock-frequency property to be -present in the sensor device nodes. +An optional clock-frequency property needs to be present in the sensor device +nodes. Default value when this property is not present is 24 MHz. Example: @@ -114,7 +131,7 @@ Example: vddio-supply = <...>; clock-frequency = <24000000>; - clocks = <...>; + clocks = <&camera 1>; clock-names = "mclk"; port { @@ -135,7 +152,7 @@ Example: vddio-supply = <...>; clock-frequency = <24000000>; - clocks = <...>; + clocks = <&camera 0>; clock-names = "mclk"; port { @@ -149,12 +166,15 @@ Example: camera { compatible = "samsung,fimc", "simple-bus"; - #address-cells = <1>; - #size-cells = <1>; - status = "okay"; - + clocks = <&clock 132>, <&clock 133>; + clock-names = "sclk_cam0", "sclk_cam1"; + #clock-cells = <1>; + clock-output-names = "cam_mclk_a", "cam_mclk_b"; pinctrl-names = "default"; pinctrl-0 = <&cam_port_a_clk_active>; + status = "okay"; + #address-cells = <1>; + #size-cells = <1>; /* parallel camera ports */ parallel-ports {