[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 71fa5a4..2d5c6d83 100644
--- 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: