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media: i2c: ov9640: drop soc_camera code and switch to v4l2_async

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This patch removes the dependency on an obsoleted soc_camera from ov9640
driver and changes the code to be a standalone v4l2 async subdevice.
It also adds GPIO allocations for power and reset signals (as they are not
handled by soc_camera now).

The values for waiting on GPIOs (reset and power) settling down were taken
from the datasheet (> 1 ms after HW/SW reset). The upper limit was chosen
as an arbitrary value. Also one occurrence of mdelay() was changed to
msleep(). The delays were successfully tested on a real hardware.

The patch makes ov9640 sensor again compatible with the pxa_camera driver.

Signed-off-by: Petr Cvek <petrcvekcz@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Petr Cvek
2018-12-13 10:39:13 -05:00
committed by Mauro Carvalho Chehab
parent 57b0ad9ebe
commit 9f7e55d235
2 changed files with 54 additions and 22 deletions
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2
drivers/media/i2c/ov9640.h
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@@ -200,6 +200,8 @@ struct ov9640_priv {
struct v4l2_subdev subdev;
struct v4l2_ctrl_handler hdl;
struct v4l2_clk *clk;
struct gpio_desc *gpio_power;
struct gpio_desc *gpio_reset;
int model;
int revision;