From patchwork Wed Apr 14 06:51:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dillon Min X-Patchwork-Id: 73264 X-Patchwork-Delegate: sakari.ailus@iki.fi Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1lWZO5-007xtW-Tk; Wed, 14 Apr 2021 06:52:34 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349487AbhDNGww (ORCPT + 1 other); Wed, 14 Apr 2021 02:52:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349466AbhDNGwk (ORCPT ); Wed, 14 Apr 2021 02:52:40 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51C04C061574; Tue, 13 Apr 2021 23:52:18 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id t22so9233298ply.1; Tue, 13 Apr 2021 23:52:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Lpn1kwcaUfGE65cGT0/6DjNShy2KH1H83CkqwOYpOyE=; b=VwqrlX7FgiEHnDw8lRpw/w9KQ6niiKdVnktrmyrmzhsBQuhngkuAISXztsI35uHqP1 2deDSRWuOe6fSUFIkv1tcvesnqrolwkLY9dMVIxnZ4q4qnUf4PPyxYcroy5O+S8A92/w 1Ll+MsNjKA/rNTuNEXfxk+f9fAVcUxAekDLSBHcRACOVma6SI5MdjKkZ0Qie6tgeKqVW ubRW6BkDVuzNt+XBScsHYbsDb5hnHYMHcRSlZ0p+mUXo5p6UdXpwszC+ACYnPeGw0j2R wB2iOlljx5xzO75/HW8bkqGLugdeUY99+yhXSCgUiBZ95CtIRXMptuA23Oj0ClOtcaIj YnOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Lpn1kwcaUfGE65cGT0/6DjNShy2KH1H83CkqwOYpOyE=; b=UXJMJ54gEX+gXy+fSWA5skttIuETTQeYAXIm0WYa57grZczqk2i0CwTD7cxO9phisC PPEfbK5LnGFBARcaCDtW1C/YOkiXjJC+qfrgvJI/QlTjcBDnGbRD+8l6+o4QtWqLonud MKNeAD7n0dy5aq/JDx22V7o6LDDsqDqFCtPtc1rcjUlmo1fWa1AbGTtkUTaQ8b4XftzF dGJgJEbWGkdmCoI5hjvUqcHg1QvZ2iIxc18I/9WsSW9r3Ais7b909XJVjJ0hFZPNjFj6 S1MHX/Pc4ZBuanI6FMHzr3NGCRwAQbsRypCO0x6+MXAK47JjHFWm9qCPI8NeKB+WLg44 O4jQ== X-Gm-Message-State: AOAM532o11su6gNEw4QOCV3mwQkWV3dWsjB4Xb3SaYGMkG89S+y9u9M+ MrDHNdPVN/BJYhHQrqLe/2s= X-Google-Smtp-Source: ABdhPJxgds7dzB9hZyvsNn/VMhn6kVi/lIJgpLjUQfvUYzbK2bQBJhw5zVbjc9XFo2HHZsvb4lWHCw== X-Received: by 2002:a17:902:eccd:b029:ea:ed20:b646 with SMTP id a13-20020a170902eccdb02900eaed20b646mr16459119plh.4.1618383137963; Tue, 13 Apr 2021 23:52:17 -0700 (PDT) Received: from fmin-OptiPlex-7060.nreal.work ([137.59.103.165]) by smtp.gmail.com with ESMTPSA id r11sm3775736pjp.46.2021.04.13.23.52.13 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 13 Apr 2021 23:52:17 -0700 (PDT) From: dillon.minfei@gmail.com To: krzysztof.kozlowski@canonical.com, robh+dt@kernel.org, shawnguo@kernel.org, krzk@kernel.org, linux@rempel-privat.de, s.riedmueller@phytec.de, matthias.schiffer@ew.tq-group.com, leoyang.li@nxp.com, arnd@arndb.de, olof@lixom.net, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, prabhakar.csengg@gmail.com, mchehab@kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-media@vger.kernel.org, dillon min Subject: [PATCH v2 3/4] media: i2c: ov2659: Add clk_prepare_enable(), clk_disable_unprepare() to handle xvclk Date: Wed, 14 Apr 2021 14:51:56 +0800 Message-Id: <1618383117-17179-4-git-send-email-dillon.minfei@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1618383117-17179-1-git-send-email-dillon.minfei@gmail.com> References: <1618383117-17179-1-git-send-email-dillon.minfei@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,FREEMAIL_FORGED_FROMDOMAIN=0.001,FREEMAIL_FROM=0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no From: dillon min For power save purpose, xvclk might not be always on. need add clk_prepare_enable(), clk_disable_unprepare() at driver side to set xvclk on/off at proper stage. Add following changes: - add 'struct clk *clk' in 'struct ov2659' - enable xvclk in ov2659_power_on() - disable xvclk in ov2659_power_off() Signed-off-by: dillon min --- v2: no changes drivers/media/i2c/ov2659.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c index 42f64175a6df..fb78a1cedc03 100644 --- a/drivers/media/i2c/ov2659.c +++ b/drivers/media/i2c/ov2659.c @@ -204,6 +204,7 @@ struct ov2659 { struct i2c_client *client; struct v4l2_ctrl_handler ctrls; struct v4l2_ctrl *link_frequency; + struct clk *clk; const struct ov2659_framesize *frame_size; struct sensor_register *format_ctrl_regs; struct ov2659_pll_ctrl pll; @@ -1270,6 +1271,8 @@ static int ov2659_power_off(struct device *dev) gpiod_set_value(ov2659->pwdn_gpio, 1); + clk_disable_unprepare(ov2659->clk); + return 0; } @@ -1278,9 +1281,17 @@ static int ov2659_power_on(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov2659 *ov2659 = to_ov2659(sd); + int ret; dev_dbg(&client->dev, "%s:\n", __func__); + ret = clk_prepare_enable(ov2659->clk); + if (ret) { + dev_err(&client->dev, "%s: failed to enable clock\n", + __func__); + return ret; + } + gpiod_set_value(ov2659->pwdn_gpio, 0); if (ov2659->resetb_gpio) { @@ -1425,7 +1436,6 @@ static int ov2659_probe(struct i2c_client *client) const struct ov2659_platform_data *pdata = ov2659_get_pdata(client); struct v4l2_subdev *sd; struct ov2659 *ov2659; - struct clk *clk; int ret; if (!pdata) { @@ -1440,11 +1450,11 @@ static int ov2659_probe(struct i2c_client *client) ov2659->pdata = pdata; ov2659->client = client; - clk = devm_clk_get(&client->dev, "xvclk"); - if (IS_ERR(clk)) - return PTR_ERR(clk); + ov2659->clk = devm_clk_get(&client->dev, "xvclk"); + if (IS_ERR(ov2659->clk)) + return PTR_ERR(ov2659->clk); - ov2659->xvclk_frequency = clk_get_rate(clk); + ov2659->xvclk_frequency = clk_get_rate(ov2659->clk); if (ov2659->xvclk_frequency < 6000000 || ov2659->xvclk_frequency > 27000000) return -EINVAL; @@ -1506,7 +1516,9 @@ static int ov2659_probe(struct i2c_client *client) ov2659->frame_size = &ov2659_framesizes[2]; ov2659->format_ctrl_regs = ov2659_formats[0].format_ctrl_regs; - ov2659_power_on(&client->dev); + ret = ov2659_power_on(&client->dev); + if (ret < 0) + goto error; ret = ov2659_detect(sd); if (ret < 0)