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authorSakari Ailus <sakari.ailus@linux.intel.com>2019-11-01 12:16:03 +0200
committerPatrick Georgi <pgeorgi@google.com>2019-12-02 12:58:28 +0000
commitc0b9c8cbc014662dccdab98841a47dca2570dc0d (patch)
tree1954c7468d1ccd39d8330c1a632a7eba6ea7827b /payloads/libpayload/README
parentecfb4b81aeb91b94a20b57d7229e1a9da9d4722f (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')
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