Based on vendor feedback, should issue a software reset at start of day.

Also, OV9740_ANALOG_CTRL15 needs to be changed so the sensor does not begin
streaming until it is ready (otherwise, results in a nonsense frame for the
initial frame).

Added a comment on using discontinuous clock.

Finally, OV9740_ISP_CTRL19 needs to be changed to really use YUYV ordering
(the previous value was for VYUY).
Signed-off-by: NAndrew Chew <achew@nvidia.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The register width of the ov9740 is 16-bits, so correct the debug print
to reflect this.
Signed-off-by: NAndrew Chew <achew@nvidia.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Made all hex number casing use lower-case throughout the entire driver
for consistency.
Signed-off-by: NAndrew Chew <achew@nvidia.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This soc_camera driver is for Omnivision's OV9740 sensor.  This initial
submission provides support for YUV422 output at 1280x720 (720p), which is
the sensor's native resolution.  640x480 (VGA) is also supported, with
cropping and scaling performed by the sensor's ISP.

This driver is heavily based off of the existing OV9640 driver.
Signed-off-by: NAndrew Chew <achew@nvidia.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>