Hello,
This series adds DT bindings and V4L2 sub-device driver for Dongwoon's DW9768,
which is a 10-bit DAC with 100mA output current sink capability.
The driver is designed for linear control of voice coil motor(VCM).
It creates a V4L2 sub-device and provides control to set the desired focus.
It controls the position with 10-bit DAC data D[9:0] and seperates
two 8-bit registers to control the VCM position as belows.
DAC_MSB: D[9:8](ADDR: 0x03):
+---+---+---+---+---+---+---+---+
|---|---|---|---|---|---|D09|D08|
+---+---+---+---+---+---+---+---+
DAC_LSB: D[7:0](ADDR: 0x04):
+---+---+---+---+---+---+---+---+
|D07|D06|D05|D04|D03|D02|D01|D00|
+---+---+---+---+---+---+---+---+
This driver supports:
- set DW9768 to standby mode once suspend and turn it back to active if resume
- set the desired focus via V4L2_CID_FOCUS_ABSOLUTE ctrl
Previous versions of this patch-set can be found here:
v8: https://lore.kernel.org/linux-media/20200616125531.31671-1-dongchun.zhu@xxxxxxxxxxxx/
v7: https://lore.kernel.org/linux-media/20200605105412.18813-1-dongchun.zhu@xxxxxxxxxxxx/
v6: https://lore.kernel.org/linux-media/20200518132731.20855-1-dongchun.zhu@xxxxxxxxxxxx/
v5: https://lore.kernel.org/linux-media/20200502161727.30463-1-dongchun.zhu@xxxxxxxxxxxx/
v4: https://lore.kernel.org/linux-media/20200330123634.363-1-dongchun.zhu@xxxxxxxxxxxx/
v3: https://lore.kernel.org/linux-media/20200228155958.20657-1-dongchun.zhu@xxxxxxxxxxxx/
v2: https://lore.kernel.org/linux-media/20190905072142.14606-1-dongchun.zhu@xxxxxxxxxxxx/
v1: https://lore.kernel.org/linux-media/20190708100641.2702-1-dongchun.zhu@xxxxxxxxxxxx/
Mainly changes of v9 are addressing comments from Tomasz.
Compared to v8:
- Refine dw9768_cal_move_delay() to return the value in a standard unit
- Refine err_power_off error handler section in probe()
- Use pm_runtime_status_suspended() in remove()
Please review.
Thanks.
Dongchun Zhu (2):
media: dt-bindings: media: i2c: Document DW9768 bindings
media: i2c: dw9768: Add DW9768 VCM driver
.../bindings/media/i2c/dongwoon,dw9768.yaml | 100 ++++
MAINTAINERS | 8 +
drivers/media/i2c/Kconfig | 12 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/dw9768.c | 554 +++++++++++++++++++++
5 files changed, 675 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/dongwoon,dw9768.yaml
create mode 100644 drivers/media/i2c/dw9768.c
--
2.9.2
