[media] adv7175: support s_power

This patch adds s_power support to adv7175 driver. Power-down is done
by power-down all four DACs.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/media/video/adv7175.c b/drivers/media/video/adv7175.c
index f318b51448b3..d2327dbb473f 100644
--- a/drivers/media/video/adv7175.c
+++ b/drivers/media/video/adv7175.c
@@ -303,11 +303,22 @@ static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ide
         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
 }
 
+static int adv7175_s_power(struct v4l2_subdev *sd, int on)
+{
+        if (on)
+                adv7175_write(sd, 0x01, 0x00);
+        else
+                adv7175_write(sd, 0x01, 0x78);
+
+        return 0;
+}
+
 /* ----------------------------------------------------------------------- */
 
 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
         .g_chip_ident = adv7175_g_chip_ident,
         .init = adv7175_init,
+        .s_power = adv7175_s_power,
 };
 
 static const struct v4l2_subdev_video_ops adv7175_video_ops = {