From patchwork Tue Nov 28 10:00:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 97422 X-Patchwork-Delegate: sakari.ailus@iki.fi Received: from ny.mirrors.kernel.org ([147.75.199.223]) by www.linuxtv.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1r7uu5-003Q33-9D for patchwork@linuxtv.org; Tue, 28 Nov 2023 10:01:18 +0000 Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id AD3C91C210A5 for ; Tue, 28 Nov 2023 10:01:14 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4DB444D138; Tue, 28 Nov 2023 10:01:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="KaF9cSBA" X-Original-To: linux-media@vger.kernel.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90570E6 for ; Tue, 28 Nov 2023 02:01:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701165662; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OGqxNiDEupYJ1a6mzum6wjQHf2d5OyeJKPVw87AAQJY=; b=KaF9cSBABtLFAtq5UdpVK4fS7mH+AR+lkTTNUi8MDF5LB2YNXFi3AkAwojGavkWdmK9LZH vRkRWUDxWsQnJoarKiAiMxZcBybEOKz6aHk6VhOzsx+tuKFg7X2hMX5FMjoTqEVD1Zd6Ar eN8SL4r00OeulbguumHcLXh4B96mUcE= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-641-typ93kgUNtOYQnyIpAmzlg-1; Tue, 28 Nov 2023 05:00:57 -0500 X-MC-Unique: typ93kgUNtOYQnyIpAmzlg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 27C092818749; Tue, 28 Nov 2023 10:00:57 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.194.244]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2FC6020268D7; Tue, 28 Nov 2023 10:00:56 +0000 (UTC) From: Hans de Goede To: Sakari Ailus , Tianshu Qiu , Bingbu Cao Cc: Hans de Goede , Mauro Carvalho Chehab , Kate Hsuan , linux-media@vger.kernel.org Subject: [PATCH v3 2/9] media: ov2740: Add support for external clock Date: Tue, 28 Nov 2023 11:00:40 +0100 Message-ID: <20231128100047.17529-3-hdegoede@redhat.com> In-Reply-To: <20231128100047.17529-1-hdegoede@redhat.com> References: <20231128100047.17529-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 X-LSpam-Score: -4.8 (----) X-LSpam-Report: No, score=-4.8 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_HIGH=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_DNSWL_MED=-2.3 autolearn=unavailable autolearn_force=no On some ACPI platforms, such as Chromebooks the ACPI methods to change the power-state (_PS0 and _PS3) fully take care of powering on/off the sensor. On other ACPI platforms, such as e.g. various ThinkPad models with IPU6 + ov2740 sensor, the sensor driver must control the reset GPIO and the sensor's clock itself. Add support for having the driver control an optional clock. Reviewed-by: Bingbu Cao Signed-off-by: Hans de Goede --- Changes in v2: - Wrap long dev_err_probe() line --- drivers/media/i2c/ov2740.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c index e5f9569a229d..0396e40419ca 100644 --- a/drivers/media/i2c/ov2740.c +++ b/drivers/media/i2c/ov2740.c @@ -3,6 +3,7 @@ #include #include +#include #include #include #include @@ -336,6 +337,7 @@ struct ov2740 { /* GPIOs, clocks */ struct gpio_desc *reset_gpio; + struct clk *clk; /* Current mode */ const struct ov2740_mode *cur_mode; @@ -1068,6 +1070,7 @@ static int ov2740_suspend(struct device *dev) struct ov2740 *ov2740 = to_ov2740(sd); gpiod_set_value_cansleep(ov2740->reset_gpio, 1); + clk_disable_unprepare(ov2740->clk); return 0; } @@ -1075,6 +1078,11 @@ static int ov2740_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov2740 *ov2740 = to_ov2740(sd); + int ret; + + ret = clk_prepare_enable(ov2740->clk); + if (ret) + return ret; gpiod_set_value_cansleep(ov2740->reset_gpio, 0); msleep(20); @@ -1102,6 +1110,11 @@ static int ov2740_probe(struct i2c_client *client) return dev_err_probe(dev, PTR_ERR(ov2740->reset_gpio), "failed to get reset GPIO\n"); + ov2740->clk = devm_clk_get_optional(dev, "clk"); + if (IS_ERR(ov2740->clk)) + return dev_err_probe(dev, PTR_ERR(ov2740->clk), + "failed to get clock\n"); + v4l2_i2c_subdev_init(&ov2740->sd, client, &ov2740_subdev_ops); full_power = acpi_dev_state_d0(&client->dev); if (full_power) {