mb/google/poppy: Rework OV5670 power on sequence

In particular:

- Enable regulators *after* configuring the voltage

- Allow 1 ms for the voltages to settle

- Enable clock after powering on regulators

- Remove extra delays between enabling things. The sensor requires 8192
  clock cycles after the reset is lifted before I²C access, so 1 ms is
  enough.

- Make the delay after lifting xshutdown 10 ms. This guarantees that
  streaming will only start once the sensor has had enough time to settle
  after lifting the reset.

BUG=chromium:959232

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Jacopo Mondi <jacopo@jmondi.org>
Change-Id: I4589a7d7ec324f4520572a406cc11ad3feec8b21
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36723
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions