fbdev/media: Use GPIO descriptors for VIA GPIO

The VIA fbdev exposes a custom GPIO chip for its GPIOs, these
are in turn looked up the camera driver using a custom API.

Drop the custom API, provide a look-up table and convert to
GPIO descriptors. Note proper polarity on the RESET line.

Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Helge Deller <deller@gmx.de>

1 files changed, 20 insertions, 31 deletions

diff --git a/drivers/media/platform/via/via-camera.c b/drivers/media/platform/via/via-camera.c
index 450254403fa8..4cb8f29e2f14 100644
--- a/drivers/media/platform/via/via-camera.c
+++ b/drivers/media/platform/via/via-camera.c
@@ -11,7 +11,7 @@
 #include <linux/device.h>
 #include <linux/list.h>
 #include <linux/pci.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/videodev2.h>
@@ -26,7 +26,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/pm_qos.h>
 #include <linux/via-core.h>
-#include <linux/via-gpio.h>
 #include <linux/via_i2c.h>
 
 #ifdef CONFIG_X86
@@ -71,8 +70,8 @@ struct via_camera {
 	/*
 	 * GPIO info for power/reset management
 	 */
-	int power_gpio;
-	int reset_gpio;
+	struct gpio_desc *power_gpio;
+	struct gpio_desc *reset_gpio;
 	/*
 	 * I/O memory stuff.
 	 */
@@ -180,27 +179,19 @@ static struct via_format *via_find_format(u32 pixelformat)
  */
 static int via_sensor_power_setup(struct via_camera *cam)
 {
-	int ret;
+	struct device *dev = &cam->platdev->dev;
+
+	cam->power_gpio = devm_gpiod_get(dev, "VGPIO3", GPIOD_OUT_LOW);
+	if (IS_ERR(cam->power_gpio))
+		return dev_err_probe(dev, PTR_ERR(cam->power_gpio),
+				     "failed to get power GPIO");
+
+	/* Request the reset line asserted */
+	cam->reset_gpio = devm_gpiod_get(dev, "VGPIO2", GPIOD_OUT_HIGH);
+	if (IS_ERR(cam->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(cam->reset_gpio),
+				     "failed to get reset GPIO");
 
-	cam->power_gpio = viafb_gpio_lookup("VGPIO3");
-	cam->reset_gpio = viafb_gpio_lookup("VGPIO2");
-	if (!gpio_is_valid(cam->power_gpio) || !gpio_is_valid(cam->reset_gpio)) {
-		dev_err(&cam->platdev->dev, "Unable to find GPIO lines\n");
-		return -EINVAL;
-	}
-	ret = gpio_request(cam->power_gpio, "viafb-camera");
-	if (ret) {
-		dev_err(&cam->platdev->dev, "Unable to request power GPIO\n");
-		return ret;
-	}
-	ret = gpio_request(cam->reset_gpio, "viafb-camera");
-	if (ret) {
-		dev_err(&cam->platdev->dev, "Unable to request reset GPIO\n");
-		gpio_free(cam->power_gpio);
-		return ret;
-	}
-	gpio_direction_output(cam->power_gpio, 0);
-	gpio_direction_output(cam->reset_gpio, 0);
 	return 0;
 }
 
@@ -209,25 +200,23 @@ static int via_sensor_power_setup(struct via_camera *cam)
  */
 static void via_sensor_power_up(struct via_camera *cam)
 {
-	gpio_set_value(cam->power_gpio, 1);
-	gpio_set_value(cam->reset_gpio, 0);
+	gpiod_set_value(cam->power_gpio, 1);
+	gpiod_set_value(cam->reset_gpio, 1);
 	msleep(20);  /* Probably excessive */
-	gpio_set_value(cam->reset_gpio, 1);
+	gpiod_set_value(cam->reset_gpio, 0);
 	msleep(20);
 }
 
 static void via_sensor_power_down(struct via_camera *cam)
 {
-	gpio_set_value(cam->power_gpio, 0);
-	gpio_set_value(cam->reset_gpio, 0);
+	gpiod_set_value(cam->power_gpio, 0);
+	gpiod_set_value(cam->reset_gpio, 1);
 }
 
 
 static void via_sensor_power_release(struct via_camera *cam)
 {
 	via_sensor_power_down(cam);
-	gpio_free(cam->power_gpio);
-	gpio_free(cam->reset_gpio);
 }
 
 /* --------------------------------------------------------------------------*/