[PATCH v5 4/5] media: uvcvideo: Make gpio_unit entity-less

[Ricardo Ribalda <ribalda@chromium.org>]

Now that we do not need to export a control there is no need to create
an entity. Move the uvc_gpio structure to uvc_device.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/usb/uvc/uvc_driver.c |  7 -------
 drivers/media/usb/uvc/uvc_gpio.c   | 39 +++++++++++++++-----------------------
 drivers/media/usb/uvc/uvc_status.c |  4 ++--
 drivers/media/usb/uvc/uvcvideo.h   |  2 +-
 4 files changed, 18 insertions(+), 34 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 89a4ac8a358f508220bca43078964bc2a8a6c4a5..b79d276732bc80ef175ffdbaa73b6395585ff07b 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1755,13 +1755,6 @@ static int uvc_scan_device(struct uvc_device *dev)
 		return -ENODEV;
 	}
 
-	/* Add GPIO entity to the first chain. */
-	if (dev->gpio_unit) {
-		chain = list_first_entry(&dev->chains,
-					 struct uvc_video_chain, list);
-		list_add_tail(&dev->gpio_unit->chain, &chain->entities);
-	}
-
 	return 0;
 }
 
diff --git a/drivers/media/usb/uvc/uvc_gpio.c b/drivers/media/usb/uvc/uvc_gpio.c
index f575b848058f48e3b73a6793e59d25a3eed1c61a..5da67c260f02dff7bbe2eb3849e8dfc939ad1d82 100644
--- a/drivers/media/usb/uvc/uvc_gpio.c
+++ b/drivers/media/usb/uvc/uvc_gpio.c
@@ -14,7 +14,7 @@
 static irqreturn_t uvc_gpio_irq(int irq, void *data)
 {
 	struct uvc_device *dev = data;
-	struct uvc_gpio *uvc_gpio = &dev->gpio_unit->gpio;
+	struct uvc_gpio *uvc_gpio = &dev->gpio_unit;
 	int new_val;
 
 	if (!uvc_gpio->gpio_ready)
@@ -51,7 +51,6 @@ static const struct dmi_system_id privacy_valid_during_streamon[] = {
 int uvc_gpio_parse(struct uvc_device *dev)
 {
 	struct gpio_desc *gpio_privacy;
-	struct uvc_entity *unit;
 	int irq;
 
 	gpio_privacy = devm_gpiod_get_optional(&dev->intf->dev, "privacy",
@@ -69,10 +68,6 @@ int uvc_gpio_parse(struct uvc_device *dev)
 		return dev_err_probe(&dev->intf->dev, irq,
 				     "No IRQ for privacy GPIO\n");
 
-	unit = uvc_alloc_entity(UVC_EXT_GPIO_UNIT, UVC_EXT_GPIO_UNIT_ID, 0, 1);
-	if (!unit)
-		return -ENOMEM;
-
 	/*
 	 * Note: This quirk will not match external UVC cameras,
 	 * as they will not have the corresponding ACPI GPIO entity.
@@ -80,38 +75,33 @@ int uvc_gpio_parse(struct uvc_device *dev)
 	if (dmi_check_system(privacy_valid_during_streamon))
 		dev->quirks |= UVC_QUIRK_PRIVACY_DURING_STREAM;
 	else
-		unit->gpio.gpio_ready = true;
-
-	unit->gpio.gpio_privacy = gpio_privacy;
-	unit->gpio.irq = irq;
-	strscpy(unit->name, "GPIO", sizeof(unit->name));
-	list_add_tail(&unit->list, &dev->entities);
+		dev->gpio_unit.gpio_ready = true;
 
-	dev->gpio_unit = unit;
+	dev->gpio_unit.gpio_privacy = gpio_privacy;
+	dev->gpio_unit.irq = irq;
 
 	return 0;
 }
 
 void uvc_gpio_quirk(struct uvc_device *dev, bool stream_on)
 {
-	if (!dev->gpio_unit || !(dev->quirks & UVC_QUIRK_PRIVACY_DURING_STREAM))
+	if (!(dev->quirks & UVC_QUIRK_PRIVACY_DURING_STREAM))
 		return;
 
-	dev->gpio_unit->gpio.gpio_ready = stream_on;
+	dev->gpio_unit.gpio_ready = stream_on;
 	if (stream_on)
 		uvc_gpio_irq(0, dev);
 }
 
 int uvc_gpio_init(struct uvc_device *dev)
 {
-	struct uvc_entity *unit = dev->gpio_unit;
 	int init_val;
 	int ret;
 
-	if (!unit || unit->gpio.irq < 0)
+	if (!dev->gpio_unit.gpio_privacy)
 		return 0;
 
-	ret = request_threaded_irq(unit->gpio.irq, NULL, uvc_gpio_irq,
+	ret = request_threaded_irq(dev->gpio_unit.irq, NULL, uvc_gpio_irq,
 				   IRQF_ONESHOT | IRQF_TRIGGER_FALLING |
 				   IRQF_TRIGGER_RISING,
 				   "uvc_privacy_gpio", dev);
@@ -122,11 +112,12 @@ int uvc_gpio_init(struct uvc_device *dev)
 		uvc_gpio_quirk(dev, false);
 		init_val = false;
 	} else {
-		unit->gpio.gpio_ready = true;
+		dev->gpio_unit.gpio_ready = true;
 
-		init_val = gpiod_get_value_cansleep(unit->gpio.gpio_privacy);
+		init_val =
+			gpiod_get_value_cansleep(dev->gpio_unit.gpio_privacy);
 		if (init_val < 0) {
-			free_irq(unit->gpio.irq, dev);
+			free_irq(dev->gpio_unit.irq, dev);
 			return init_val;
 		}
 	}
@@ -134,15 +125,15 @@ int uvc_gpio_init(struct uvc_device *dev)
 	input_report_switch(dev->input, SW_CAMERA_LENS_COVER, init_val);
 	input_sync(dev->input);
 
-	unit->gpio.initialized = true;
+	dev->gpio_unit.initialized = true;
 
 	return 0;
 }
 
 void uvc_gpio_deinit(struct uvc_device *dev)
 {
-	if (!dev->gpio_unit || !dev->gpio_unit->gpio.initialized)
+	if (!dev->gpio_unit.initialized)
 		return;
 
-	free_irq(dev->gpio_unit->gpio.irq, dev);
+	free_irq(dev->gpio_unit.irq, dev);
 }
diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c
index 664ba59af8ecad5511c9dea924bf037b2aafc0d0..dbffed828761202c62c003b9200fd9916b16a969 100644
--- a/drivers/media/usb/uvc/uvc_status.c
+++ b/drivers/media/usb/uvc/uvc_status.c
@@ -44,7 +44,7 @@ static int uvc_input_init(struct uvc_device *dev)
 	struct input_dev *input;
 	int ret;
 
-	if (!uvc_input_has_button(dev) && !dev->gpio_unit)
+	if (!uvc_input_has_button(dev) && !dev->gpio_unit.gpio_privacy)
 		return 0;
 
 	input = input_allocate_device();
@@ -64,7 +64,7 @@ static int uvc_input_init(struct uvc_device *dev)
 		__set_bit(KEY_CAMERA, input->keybit);
 	}
 
-	if (dev->gpio_unit) {
+	if (dev->gpio_unit.gpio_privacy) {
 		__set_bit(EV_SW, input->evbit);
 		__set_bit(SW_CAMERA_LENS_COVER, input->swbit);
 	}
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 827ea2eb676c81cabb8051485b6e6813e9c6dca8..c098f30b07797281576d7ff533cde25309be8b61 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -628,7 +628,7 @@ struct uvc_device {
 		const void *data;
 	} async_ctrl;
 
-	struct uvc_entity *gpio_unit;
+	struct uvc_gpio gpio_unit;
 };
 
 struct uvc_fh {

-- 
2.50.0.727.gbf7dc18ff4-goog