From patchwork Mon Apr 15 13:10:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 789098 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F305571B40 for ; Mon, 15 Apr 2024 13:10:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713186660; cv=none; b=juPhNb5z2TTbmFiaMvvJQ3tAFqq8d55kXyodYwdjTX8Ehb7Id8gLlP2xCr3xjxMt1Oyzehs2te6WFDK9/FBEYVynIK7uBuWPP3s/8s+fpBaiRdNClyqNgw+xipZo1r0a4pk8qGXJwyLhVlLlR57zPAzgqFJjazSCgnAnOM6BvmA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713186660; c=relaxed/simple; bh=fW5TvR6ZGUfwE09yf9LbpDmUs0R8rLgsFBWiqtBswUc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B+O56wxajzxqttW9OUfTQRqOpuBGKq6bQTBD3H/WiZQdBK2u6M0ct+k/iwr5WeGFHOI8NLu7FHdaWM5UrCmtXSPHO91qnD9Q32ekVXHeHLKqnQdGVciRQmZ8B8OZ1RivFNatu/uFd8GrK+E0FRJxyhcHEKn7GzePPgRzsT79U8I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ZQaxLfpa; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZQaxLfpa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1713186657; 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=+NO69vgdtGETkuhBAyGanubfvTjIEjGugqn8H7wz06A=; b=ZQaxLfpaVBUX0MtOvX+OsW4FSU96pZ/huYwMXvdNz6gCenX2iLjJq/l9vl9Koa+VGWa/su 2UbEZa35/0BIlSSmYRPJk4WZzMuo5u9dfBaDNU1sogK1i6GbGWw7mErlmLSDHPj/UNX0eT WfoMt634S4p5OUG7LspG5srkHwY1Zq8= 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-364-iTubTrvyMf-4lab8acgvTA-1; Mon, 15 Apr 2024 09:10:54 -0400 X-MC-Unique: iTubTrvyMf-4lab8acgvTA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (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 3B4B828B727A; Mon, 15 Apr 2024 13:10:54 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.195.17]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4468851EF; Mon, 15 Apr 2024 13:10:53 +0000 (UTC) From: Hans de Goede To: Sakari Ailus , Rui Miguel Silva Cc: Hans de Goede , Mauro Carvalho Chehab , Kate Hsuan , Kieran Bingham , linux-media@vger.kernel.org Subject: [PATCH v2 2/4] media: hi556: Add support for reset GPIO Date: Mon, 15 Apr 2024 15:10:36 +0200 Message-ID: <20240415131038.236660-3-hdegoede@redhat.com> In-Reply-To: <20240415131038.236660-1-hdegoede@redhat.com> References: <20240415131038.236660-1-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 10.11.54.5 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 HP models with IPU6 + hi556 sensor, the sensor driver must control the reset GPIO itself. Add support for having the driver control an optional reset GPIO. Signed-off-by: Hans de Goede --- drivers/media/i2c/hi556.c | 45 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff --git a/drivers/media/i2c/hi556.c b/drivers/media/i2c/hi556.c index c54cd49e56a1..e084f7888e29 100644 --- a/drivers/media/i2c/hi556.c +++ b/drivers/media/i2c/hi556.c @@ -4,6 +4,7 @@ #include #include #include +#include #include #include #include @@ -633,6 +634,9 @@ struct hi556 { struct v4l2_ctrl *hblank; struct v4l2_ctrl *exposure; + /* GPIOs, clocks, etc. */ + struct gpio_desc *reset_gpio; + /* Current mode */ const struct hi556_mode *cur_mode; @@ -1276,6 +1280,25 @@ static void hi556_remove(struct i2c_client *client) mutex_destroy(&hi556->mutex); } +static int hi556_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct hi556 *hi556 = to_hi556(sd); + + gpiod_set_value_cansleep(hi556->reset_gpio, 1); + return 0; +} + +static int hi556_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct hi556 *hi556 = to_hi556(sd); + + gpiod_set_value_cansleep(hi556->reset_gpio, 0); + usleep_range(5000, 5500); + return 0; +} + static int hi556_probe(struct i2c_client *client) { struct hi556 *hi556; @@ -1295,12 +1318,24 @@ static int hi556_probe(struct i2c_client *client) v4l2_i2c_subdev_init(&hi556->sd, client, &hi556_subdev_ops); + hi556->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(hi556->reset_gpio)) + return dev_err_probe(&client->dev, PTR_ERR(hi556->reset_gpio), + "failed to get reset GPIO\n"); + full_power = acpi_dev_state_d0(&client->dev); if (full_power) { + /* Ensure non ACPI managed resources are enabled */ + ret = hi556_resume(&client->dev); + if (ret) + return dev_err_probe(&client->dev, ret, + "failed to power on sensor\n"); + ret = hi556_identify_module(hi556); if (ret) { dev_err(&client->dev, "failed to find sensor: %d", ret); - return ret; + goto probe_error_power_off; } } @@ -1345,9 +1380,16 @@ static int hi556_probe(struct i2c_client *client) v4l2_ctrl_handler_free(hi556->sd.ctrl_handler); mutex_destroy(&hi556->mutex); +probe_error_power_off: + if (full_power) + hi556_suspend(&client->dev); + return ret; } +static DEFINE_RUNTIME_DEV_PM_OPS(hi556_pm_ops, hi556_suspend, hi556_resume, + NULL); + #ifdef CONFIG_ACPI static const struct acpi_device_id hi556_acpi_ids[] = { {"INT3537"}, @@ -1361,6 +1403,7 @@ static struct i2c_driver hi556_i2c_driver = { .driver = { .name = "hi556", .acpi_match_table = ACPI_PTR(hi556_acpi_ids), + .pm = pm_sleep_ptr(&hi556_pm_ops), }, .probe = hi556_probe, .remove = hi556_remove,