1 files changed, 41 insertions, 14 deletions

diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index 554d229..0c52437 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -117,24 +117,51 @@ static int reg_clear(struct soc_camera_device *icd, const u8 reg,
 
 static int mt9m001_init(struct soc_camera_device *icd)
 {
+	struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+	struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
 	int ret;
 
-	/* Disable chip, synchronous option update */
 	dev_dbg(icd->vdev->parent, "%s\n", __func__);
 
-	ret = reg_write(icd, MT9M001_RESET, 1);
-	if (ret >= 0)
-		ret = reg_write(icd, MT9M001_RESET, 0);
-	if (ret >= 0)
+	if (icl->power) {
+		ret = icl->power(&mt9m001->client->dev, 1);
+		if (ret < 0) {
+			dev_err(icd->vdev->parent,
+				"Platform failed to power-on the camera.\n");
+			return ret;
+		}
+	}
+
+	/* The camera could have been already on, we reset it additionally */
+	if (icl->reset)
+		ret = icl->reset(&mt9m001->client->dev);
+	else
+		ret = -ENODEV;
+
+	if (ret < 0) {
+		/* Either no platform reset, or platform reset failed */
+		ret = reg_write(icd, MT9M001_RESET, 1);
+		if (!ret)
+			ret = reg_write(icd, MT9M001_RESET, 0);
+	}
+	/* Disable chip, synchronous option update */
+	if (!ret)
 		ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
 
-	return ret >= 0 ? 0 : -EIO;
+	return ret;
 }
 
 static int mt9m001_release(struct soc_camera_device *icd)
 {
+	struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+	struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
+
 	/* Disable the chip */
 	reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
+
+	if (icl->power)
+		icl->power(&mt9m001->client->dev, 0);
+
 	return 0;
 }
 
@@ -267,24 +294,24 @@ static int mt9m001_set_fmt_cap(struct soc_camera_device *icd,
 
 	/* Blanking and start values - default... */
 	ret = reg_write(icd, MT9M001_HORIZONTAL_BLANKING, hblank);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_write(icd, MT9M001_VERTICAL_BLANKING, vblank);
 
 	/* The caller provides a supported format, as verified per
 	 * call to icd->try_fmt_cap() */
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_write(icd, MT9M001_COLUMN_START, rect->left);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_write(icd, MT9M001_ROW_START, rect->top);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_write(icd, MT9M001_WINDOW_WIDTH, rect->width - 1);
-	if (ret >= 0)
+	if (!ret)
 		ret = reg_write(icd, MT9M001_WINDOW_HEIGHT,
 				rect->height + icd->y_skip_top - 1);
-	if (ret >= 0 && mt9m001->autoexposure) {
+	if (!ret && mt9m001->autoexposure) {
 		ret = reg_write(icd, MT9M001_SHUTTER_WIDTH,
 				rect->height + icd->y_skip_top + vblank);
-		if (ret >= 0) {
+		if (!ret) {
 			const struct v4l2_queryctrl *qctrl =
 				soc_camera_find_qctrl(icd->ops,
 						      V4L2_CID_EXPOSURE);
@@ -295,7 +322,7 @@ static int mt9m001_set_fmt_cap(struct soc_camera_device *icd,
 		}
 	}
 
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 static int mt9m001_try_fmt_cap(struct soc_camera_device *icd,