From 90ee26fb2f50e1e57f9d957a1799af1bcafd9671 Mon Sep 17 00:00:00 2001 From: Bingbu Cao Date: Tue, 19 Jun 2018 02:01:47 -0400 Subject: 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 Signed-off-by: Bingbu Cao Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/media/i2c/Kconfig') diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 1cf91bce2613..8669853e1361 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 -- cgit v1.2.3