[PATCH v2 0/2] media: i2c: imx290: check for availability in probe()

[Benjamin Bara]

Hi!

This series introduces i2c communication with the imx290 sensor during
probe s.t. the v4l2 subdev is not initialized when the chip is not
reachable.

The datasheets show that INCKSEL* registers have a different default
value after reset on imx290[1] and imx327[2], however I am not sure if
this is a sufficient identification option - therefore I just removed
the current CHIP_ID register for now.

thanks & regards
Benjamin

[1] https://static6.arrow.com/aropdfconversion/c0c7efde6571c768020a72f59b226308b9669e45/sony_imx290lqr-c_datasheet.pdf
[2] https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/138/IMX327LQR_2D00_C_5F00_TechnicalDatasheet_5F00_E_5F00_Rev0.2.pdf

---
Changes in v2:
- dropped 1/2 to ignore the read value in cci_read() (old 2/2 -> new 1/2)
- 1/2: read-back standby mode instead and ensure that it is really in standby
- new 2/2: drop chip_id register definition which seems to be incorrect
- Link to v1: https://lore.kernel.org/r/20240807-imx290-avail-v1-0-666c130c7601@xxxxxxxxxxx

---
Benjamin Bara (2):
      media: i2c: imx290: Check for availability in probe()
      media: i2c: imx290: Remove CHIP_ID reg definition

 drivers/media/i2c/imx290.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)
---
base-commit: eec5d86d5bac6b3e972eb9c1898af3c08303c52d
change-id: 20240807-imx290-avail-85795c27d988

Best regards,
-- 
Benjamin Bara <benjamin.bara@xxxxxxxxxxx>