From patchwork Thu Aug 29 09:32:48 2013 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: 2851191 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 241529F2F4 for ; Thu, 29 Aug 2013 09:33:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F41C22030E for ; Thu, 29 Aug 2013 09:33:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA86B20315 for ; Thu, 29 Aug 2013 09:33:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755976Ab3H2Jdk (ORCPT ); Thu, 29 Aug 2013 05:33:40 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:61614 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755822Ab3H2Jdj (ORCPT ); Thu, 29 Aug 2013 05:33:39 -0400 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 <0MSA00FQTD7XVQ90@mailout1.samsung.com>; Thu, 29 Aug 2013 18:33:33 +0900 (KST) X-AuditID: cbfee61a-b7f7a6d00000235f-aa-521f156cc6f0 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 4D.EF.09055.C651F125; Thu, 29 Aug 2013 18:33:32 +0900 (KST) Received: from amdc1344.digital.local ([106.116.147.32]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0MSA007GND6RPQ50@mmp1.samsung.com>; Thu, 29 Aug 2013 18:33:32 +0900 (KST) From: Sylwester Nawrocki To: linux-media@vger.kernel.org Cc: mturquette@linaro.org, g.liakhovetski@gmx.de, laurent.pinchart@ideasonboard.com, arun.kk@samsung.com, hverkuil@xs4all.nl, sakari.ailus@iki.fi, a.hajda@samsung.com, kyungmin.park@samsung.com, t.figa@samsung.com, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Sylwester Nawrocki Subject: [RESEND PATCH v2 4/7] V4L: s5k6a3: Add support for asynchronous subdev registration Date: Thu, 29 Aug 2013 11:32:48 +0200 Message-id: <1377768768-16013-1-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrDLMWRmVeSWpSXmKPExsVy+t9jAd0cUfkggwdbbCxurTvHavHx1G1W i/lHgKz3G+cxWZya/IzJ4mzTG3aLzolL2C02Pb7GatGzYSurxYzz+5gsnk64yGZx+E07q8WZ /SvZLNbPeM3iwOfx4WOcx+yOmaweh78uZPG4c20Pm8fmJfUefVtWMXp83iTncerrZ/YAjigu m5TUnMyy1CJ9uwSujLfrmpkKbkhWTGmYy9zAeF+ki5GTQ0LARGL+53nMELaYxIV769m6GLk4 hAQWMUpsOtUC5XQwSax88I0NpIpNwFCi92gfI4gtIiAv8aT3BlgRs8BHJondXf2sIAlhgTiJ X78eMoHYLAKqEmuf9IKt4BVwk+hbuQAozgG0TkFiziSbCYzcCxgZVjGKphYkFxQnpeca6hUn 5haX5qXrJefnbmIEh+EzqR2MKxssDjEKcDAq8fBG/JYNEmJNLCuuzD3EKMHBrCTC+5ZTPkiI NyWxsiq1KD++qDQntfgQozQHi5I474FW60AhgfTEktTs1NSC1CKYLBMHp1QDY/AK9pcXr3Uy OrxzzH5w6kJP/eUdkhoXuaW+TLfbJftrSY/A1j2PrzfLrZdtP5577OXxhxN0f4fqP1i0+YeC yu9Z6lES/JEswnGmDnuuFPGnTYh6+kJ4Up7mui+hRhPlXR7s23yBLYHxTlcSV4qeasUk9XsO q8rtPSc2fZ2fKOW7tJy/subbQiWW4oxEQy3mouJEACKG9S4/AgAA 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=-9.4 required=5.0 tests=BAYES_00, 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 converts the driver to use v4l2 asynchronous subdev registration API an the clock API to control the external master clock directly. Signed-off-by: Sylwester Nawrocki Signed-off-by: Kyungmin Park --- drivers/media/i2c/s5k6a3.c | 36 ++++++++++++++++++++++++++---------- 1 file changed, 26 insertions(+), 10 deletions(-) diff --git a/drivers/media/i2c/s5k6a3.c b/drivers/media/i2c/s5k6a3.c index ba86e24..f65a4f8 100644 --- a/drivers/media/i2c/s5k6a3.c +++ b/drivers/media/i2c/s5k6a3.c @@ -34,6 +34,7 @@ #define S5K6A3_DEFAULT_HEIGHT 732 #define S5K6A3_DRV_NAME "S5K6A3" +#define S5K6A3_CLK_NAME "extclk" #define S5K6A3_DEFAULT_CLK_FREQ 24000000U #define S5K6A3_NUM_SUPPLIES 2 @@ -56,6 +57,7 @@ struct s5k6a3 { int gpio_reset; struct mutex lock; struct v4l2_mbus_framefmt format; + struct clk *clock; u32 clock_frequency; }; @@ -181,19 +183,25 @@ static int s5k6a3_s_power(struct v4l2_subdev *sd, int on) { struct s5k6a3 *sensor = sd_to_s5k6a3(sd); int gpio = sensor->gpio_reset; - int ret; + int ret = 0; if (on) { + ret = clk_set_rate(sensor->clock, sensor->clock_frequency); + if (ret < 0) + return ret; + ret = pm_runtime_get(sensor->dev); if (ret < 0) return ret; ret = regulator_bulk_enable(S5K6A3_NUM_SUPPLIES, sensor->supplies); - if (ret < 0) { - pm_runtime_put(sensor->dev); - return ret; - } + if (ret < 0) + goto rpm_put; + + ret = clk_prepare_enable(sensor->clock); + if (ret < 0) + goto reg_dis; if (gpio_is_valid(gpio)) { gpio_set_value(gpio, 1); @@ -209,10 +217,12 @@ static int s5k6a3_s_power(struct v4l2_subdev *sd, int on) if (gpio_is_valid(gpio)) gpio_set_value(gpio, 0); - ret = regulator_bulk_disable(S5K6A3_NUM_SUPPLIES, - sensor->supplies); - if (!ret) - pm_runtime_put(sensor->dev); + clk_disable_unprepare(sensor->clock); +reg_dis: + regulator_bulk_disable(S5K6A3_NUM_SUPPLIES, + sensor->supplies); +rpm_put: + pm_runtime_put(sensor->dev); } return ret; } @@ -240,6 +250,7 @@ static int s5k6a3_probe(struct i2c_client *client, mutex_init(&sensor->lock); sensor->gpio_reset = -EINVAL; + sensor->clock = ERR_PTR(-EINVAL); sensor->dev = dev; gpio = of_get_gpio_flags(dev->of_node, 0, NULL); @@ -266,6 +277,10 @@ static int s5k6a3_probe(struct i2c_client *client, if (ret < 0) return ret; + sensor->clock = devm_clk_get(dev, S5K6A3_CLK_NAME); + if (IS_ERR(sensor->clock)) + return -EPROBE_DEFER; + sd = &sensor->subdev; v4l2_i2c_subdev_init(sd, client, &s5k6a3_subdev_ops); sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; @@ -282,7 +297,7 @@ static int s5k6a3_probe(struct i2c_client *client, pm_runtime_no_callbacks(dev); pm_runtime_enable(dev); - return 0; + return v4l2_async_register_subdev(sd); } static int s5k6a3_remove(struct i2c_client *client) @@ -290,6 +305,7 @@ static int s5k6a3_remove(struct i2c_client *client) struct v4l2_subdev *sd = i2c_get_clientdata(client); pm_runtime_disable(&client->dev); + v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); return 0; }