From patchwork Tue Mar 31 13:52:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacek Anaszewski X-Patchwork-Id: 6130301 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id F2F99BF4A6 for ; Tue, 31 Mar 2015 13:55:07 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 147ED201ED for ; Tue, 31 Mar 2015 13:55:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 227A3201BB for ; Tue, 31 Mar 2015 13:55:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754522AbbCaNzD (ORCPT ); Tue, 31 Mar 2015 09:55:03 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:55003 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754441AbbCaNzB (ORCPT ); Tue, 31 Mar 2015 09:55:01 -0400 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout4.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NM200CYGXBNFWB0@mailout4.samsung.com>; Tue, 31 Mar 2015 22:54:59 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-f6-551aa7332a15 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 3F.62.20081.337AA155; Tue, 31 Mar 2015 22:54:59 +0900 (KST) Received: from AMDC2362.DIGITAL.local ([106.120.53.23]) by mmp1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0NM200JI4X7ZTQ90@mmp1.samsung.com>; Tue, 31 Mar 2015 22:54:59 +0900 (KST) From: Jacek Anaszewski To: linux-leds@vger.kernel.org, linux-media@vger.kernel.org Cc: kyungmin.park@samsung.com, pavel@ucw.cz, cooloney@gmail.com, rpurdie@rpsys.net, sakari.ailus@iki.fi, s.nawrocki@samsung.com, Jacek Anaszewski , devicetree@vger.kernel.org Subject: [PATCH v4 07/12] DT: Add documentation for the Skyworks AAT1290 Date: Tue, 31 Mar 2015 15:52:43 +0200 Message-id: <1427809965-25540-8-git-send-email-j.anaszewski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1427809965-25540-1-git-send-email-j.anaszewski@samsung.com> References: <1427809965-25540-1-git-send-email-j.anaszewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrGLMWRmVeSWpSXmKPExsVy+t9jAV3j5VKhBje+aVkc3TmRyWL+kXOs Fr1XnzNanG16w26x9c06RoueDVtZLe6eOspmsXvXU1aLw2/aWS3O7F/J5sDlsXPWXXaPw18X snjsmf+D1aNvyypGjxWrv7N7fN4kF8AWxWWTkpqTWZZapG+XwJXx/ulhtoLtQhVPpl9ma2Cc x9/FyMkhIWAiMfPoNiYIW0ziwr31bF2MXBxCAosYJdr7LrGAJIQEfjJK7HifA2KzCRhK/Hzx GqxBRMBaYtah6WA1zAJnGCX+7dMGsYUFPCT+z1/NCmKzCKhK3G/dzghi8wLF/93fD2RzAC1T kJgzyQYkzCngKdG5aic7xCoPic9v97BPYORdwMiwilE0tSC5oDgpPddQrzgxt7g0L10vOT93 EyM49J5J7WBc2WBxiFGAg1GJh/fCPclQIdbEsuLK3EOMEhzMSiK8PydKhQrxpiRWVqUW5ccX leakFh9ilOZgURLnVbJvCxESSE8sSc1OTS1ILYLJMnFwSjUwLo0QubDBb01Lh9uUWL2ly2e9 DZn08PhOw3cdF6dLdL3aeNBnn+Ynq2sX965IuLvoDHuKQOGcbYc9Eqc127BUvtp8xePo7hm+ 7ovcL2507D2m7infYsrfGcOgJJb2VUyu5og95/6g4hNBVy1XHXh0+ljWNR6Z/wKan24ytD3a M1vBQ8f6xwSbhUosxRmJhlrMRcWJACozK9A5AgAA Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 adds device tree binding documentation for 1.5A Step-Up Current Regulator for Flash LEDs. Signed-off-by: Jacek Anaszewski Acked-by: Kyungmin Park Cc: Bryan Wu Cc: Richard Purdie Cc: devicetree@vger.kernel.org --- .../devicetree/bindings/leds/leds-aat1290.txt | 40 ++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-aat1290.txt diff --git a/Documentation/devicetree/bindings/leds/leds-aat1290.txt b/Documentation/devicetree/bindings/leds/leds-aat1290.txt new file mode 100644 index 0000000..6893eb1 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-aat1290.txt @@ -0,0 +1,40 @@ +* Skyworks Solutions, Inc. AAT1290 Current Regulator for Flash LEDs + +The device is controlled through two pins: FL_EN and EN_SET. The pins when, +asserted high, enable flash strobe and movie mode (max 1/2 of flash current) +respectively. + +Required properties: + +- compatible : Must be "skyworks,aat1290". +- flen-gpios : Must be device tree identifier of the flash device FL_EN pin. +- enset-gpios : Must be device tree identifier of the flash device EN_SET pin. + +A discrete LED element connected to the device must be represented by a child +node - see Documentation/devicetree/bindings/leds/common.txt. + +Required properties of the LED child node: +- flash-max-microamp : Maximum intensity in microamperes of the flash LED - + it can be calculated using following formula: + I = 1A * 162kohm / Rset. +- flash-timeout-us : Maximum flash timeout in microseconds - + it can be calculated using following formula: + T = 8.82 * 10^9 * Ct. + +Optional properties of the LED child node: +- label : see Documentation/devicetree/bindings/leds/common.txt + +Example (by Ct = 220nF, Rset = 160kohm and exynos4412-trats2 board with +a switch that allows for routing strobe signal either from host or from ISP): + +aat1290 { + compatible = "skyworks,aat1290"; + flen-gpios = <&gpj1 1 GPIO_ACTIVE_HIGH>; + enset-gpios = <&gpj1 2 GPIO_ACTIVE_HIGH>; + + camera_flash: flash-led { + label = "aat1290-flash"; + flash-max-microamp = <1012500>; + flash-timeout-us = <1940000>; + }; +};