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author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2019-11-01 12:16:03 +0200 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2019-12-02 12:58:28 +0000 |
commit | c0b9c8cbc014662dccdab98841a47dca2570dc0d (patch) | |
tree | 1954c7468d1ccd39d8330c1a632a7eba6ea7827b /payloads/libpayload/README | |
parent | ecfb4b81aeb91b94a20b57d7229e1a9da9d4722f (diff) |
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>
Diffstat (limited to 'payloads/libpayload/README')
0 files changed, 0 insertions, 0 deletions