media: ccs: Hardware requires a delay after starting the clock of lifting reset

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A CCS compliant device requires a delay before the first I²C transaction
after pulling xshutdown up or starting the external clock. This is what
the driver does. However, if neither is actually there, there's no need
for the delay.

This also has the effect of removing an unnecessary delay on ACPI systems
where ACPI is responsible for the power-up sequence.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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Sakari Ailus 2020-10-08 18:24:39 +02:00 • committed by Mauro Carvalho Chehab

parent 51fc72e541

commit 2fed6c84dc

1 changed files with 16 additions and 13 deletions

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33

drivers/media/i2c/ccs/ccs-core.c

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