Guennadi Liakhovetski wrote:
Use platform power hook to turn the camera on and off.
Signed-off-by: Guennadi Liakhovetski <lg@xxxxxxx>
---
diff --git a/drivers/media/video/mt9t031.c b/drivers/media/video/mt9t031.c
index 23f9ce9..2b0927b 100644
--- a/drivers/media/video/mt9t031.c
+++ b/drivers/media/video/mt9t031.c
@@ -141,8 +141,19 @@ static int get_shutter(struct soc_camera_device *icd, u32 *data)
static int mt9t031_init(struct soc_camera_device *icd)
{
+ struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
+ struct soc_camera_link *icl = mt9t031->client->dev.platform_data;
int ret;
+ if (icl->power) {
+ ret = icl->power(&mt9t031->client->dev, 1);
+ if (ret < 0) {
+ dev_err(icd->vdev->parent,
+ "Platform failed to power-on the camera.\n");
+ return ret;
+ }
+ }
probably you would have to call icl->reset there too?
I guess this camera sensor does have a reset pin?
+
/* Disable chip output, synchronous option update */
ret = reg_write(icd, MT9T031_RESET, 1);
if (ret >= 0)
@@ -150,13 +161,23 @@ static int mt9t031_init(struct soc_camera_device *icd)
if (ret >= 0)
ret = reg_clear(icd, MT9T031_OUTPUT_CONTROL, 2);
+ if (ret < 0 && icl->power)
+ icl->power(&mt9t031->client->dev, 0);
+
return ret >= 0 ? 0 : -EIO;
}
static int mt9t031_release(struct soc_camera_device *icd)
{
+ struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd);
+ struct soc_camera_link *icl = mt9t031->client->dev.platform_data;
+
/* Disable the chip */
reg_clear(icd, MT9T031_OUTPUT_CONTROL, 2);
+
+ if (icl->power)
+ icl->power(&mt9t031->client->dev, 0);
+
return 0;
}
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