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| author | Bingbu Cao <bingbu.cao@intel.com> | 2018-06-19 02:01:47 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-07-04 07:13:34 -0400 |
| commit | 90ee26fb2f50e1e57f9d957a1799af1bcafd9671 (patch) | |
| tree | 83e27df206c5e675a4da952dae5bbd3e43275223 /drivers/media/i2c/Kconfig | |
| parent | ad5145164b21eb4fcb091096b1b384a3faecac64 (diff) | |
| download | linux-0-day-90ee26fb2f50e1e57f9d957a1799af1bcafd9671.tar.gz linux-0-day-90ee26fb2f50e1e57f9d957a1799af1bcafd9671.tar.xz | |
media: ak7375: Add ak7375 lens voice coil driver
Add a v4l2 sub-device driver for the ak7375 lens voice coil.
This is a voice coil module using the i2c bus to control the
focus position.
ak7375 can write multiple bytes of data at a time. If more
data is received instead of the stop condition after receiving
one byte of data, the address inside the chip is automatically
incremented and the data is written into the next address.
The ak7375 can control the position with 12 bits value and
consists of two 8 bit registers show as below:
register 0x00(AK7375_REG_POSITION):
+---+---+---+---+---+---+---+---+
|D11|D10|D09|D08|D07|D06|D05|D04|
+---+---+---+---+---+---+---+---+
register 0x01:
+---+---+---+---+---+---+---+---+
|D03|D02|D01|D00|---|---|---|---|
+---+---+---+---+---+---+---+---+
This driver support :
- set ak7375 to standby mode once suspend and
turn it back to active if resume
- set the position via V4L2_CID_FOCUS_ABSOLUTE ctrl
[Sakari Ailus: Rename val as ret in probe, drop redundant error message]
Signed-off-by: Tianshu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/i2c/Kconfig')
| -rw-r--r-- | drivers/media/i2c/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 1cf91bce26133..8669853e13614 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -326,6 +326,16 @@ config VIDEO_AD5820 This is a driver for the AD5820 camera lens voice coil. It is used for example in Nokia N900 (RX-51). +config VIDEO_AK7375 + tristate "AK7375 lens voice coil support" + depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER + depends on VIDEO_V4L2_SUBDEV_API + help + This is a driver for the AK7375 camera lens voice coil. + AK7375 is a 12 bit DAC with 120mA output current sink + capability. This is designed for linear control of + voice coil motors, controlled via I2C serial interface. + config VIDEO_DW9714 tristate "DW9714 lens voice coil support" depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER |