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authorGrygorii Strashko <[email protected]>2015-12-21 11:54:46 -0200
committerMauro Carvalho Chehab <[email protected]>2016-01-25 15:15:37 -0200
commit2e490139b137bbac3250d594cef3dcbc461ad4cc (patch)
treebc5b2a7886e474d0a7ad77cd78798d7ffb656be9 /tools/perf/scripts/python/call-graph-from-postgresql.py
parentd5441ea58ccc70637b75b035dee61685b516a5ca (diff)
[media] media: i2c: ov2659: speedup probe if no device connected
The ov2659 driver performs device detection and initialization in the following way: - send reset command REG_SOFTWARE_RESET - load array of predefined register's setting (~150 values) - read device version REG_SC_CHIP_ID_H/REG_SC_CHIP_ID_L - check version and exit if invalid. As result, for not connected device there will be >~150 i2c transactions executed before device version checking and exit (there are no failures detected because ov2659 declared as I2C_CLIENT_SCCB and NACKs are ignored in this case). Let's fix that by checking the chip version first and start initialization only if it's supported. Cc: Benoit Parrot <[email protected]> Signed-off-by: Grygorii Strashko <[email protected]> Acked-by: Lad, Prabhakar <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
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