[media] gspca_pac7302: extend register documentation

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/usb/gspca/pac7302.c b/drivers/media/usb/gspca/pac7302.c
index 71fa5a45c2e1259aa74834455820d927f5a3ace7..2d5c6d8343a01c475291b3435de77cec7112ff35 100644 (file)
--- a/drivers/media/usb/gspca/pac7302.c
+++ b/drivers/media/usb/gspca/pac7302.c
@@ -29,6 +29,15 @@
  * Register page 0:
  *
  * Address     Description
+ * 0x02                Red balance control
+ * 0x03                Green balance control
+ * 0x04        Blue balance control
+ *                  Valus are inverted (0=max, 255=min).
+ *                  The Windows driver uses a quadratic approach to map
+ *                  the settable values (0-200) on register values:
+ *                  min=0x80, default=0x40, max=0x20
+ * 0x0f-0x20   Colors, saturation and exposure control
+ * 0xa2-0xab   Brightness, contrast and gamma control
  * 0xb6                Sharpness control (bits 0-4)
  *
  * Register page 1: