media: ov08x40: Fix value of reset GPIO when requesting it

We should put/leave the sensor in reset when requesting the GPIO, after
requesting it there are 2 possible scenarios and having the GPIO driven
low is no good in either scenario:

1. The sensor was in ACPI D0 before probe() runs, in this case
   ov08x40_power_on() + ov08x40_identify_module() will run immediately
   after requesting the GPIO and ov08x40_power_on() starts with driving
   the GPIO high. So if the GPIO was already high it will very shortly
   be driven low, more of a spike to low then actually properly be driven
   low. Which may leave the sensor in a confused state.

   If we request the GPIO to be high at request time then power_on() will
   driver it high again (no-op) and then sleep for 1-2 ms, so no spike.

2. The sensor was in ACPI D3 / off before probe(), in this case probe()
   leaves the sensor alone. But when the sensor is off its reset line
   should be driven high not low.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

0 files changed, 0 insertions, 0 deletions