Feature Request: Add support for TCS3725 ahd VEML6040 RGB Color Sensors

[Jibun-no-Kage]

Feature Request: Add support for TCS34725 ahd VEML6040 RGB Color Sensors as device tree overlays.

Example of TCS34725 RGB Color Sensor...
https://www.adafruit.com/product/1334

VEML6040 RGB Color Sensor...
https://www.taydaelectronics.com/veml6040-color-sensor-rgbw-i2c-module.html

[pelwell]

TCS34725 will need it's driver enabling - CONFIG_TCS3472=m. It makes no use of Device Tree configuration, so it should just be a matter of adding the name to the i2c-sensor overlay.

The VEML6040 (not VMEML6040) driver doesn't exist in 6.6, but it is there in 6.12. It also doesn't seem to require any configuration.

If I have a moment I might throw together the necessary config and overlay updates against 6.12. What's your application?

[pelwell]

And which I2C addresses can the devices appear on - don't make me read the datasheets.

[Jibun-no-Kage]

Oh, right, TCS34725 is 0x29... VEML6040 is 0x10...

The use case is that I am using these sensors to read a 'tally' light on a remote floating head camera, at the end of 25 or so foot jib or boom crane... which is beyond visibility to anyone at ground level. A micro controlller, i.e. in this case Pi Zero 2W forwards this color state to a production broadcast monitor at ground level, that has a custom GPIO interface, I have not decided if I will use solid-state relays, opto-couplers, or NPN transistors, or even mosfet to do the actual GPIO pin state changes between the Pi and monitor GPIO interface yet. but since i have the solid state relays, likely use those for the initial testing., And of course, the relays provide isolation between Pi GPIO and Production Monitor GPIO.

Sensor->i2c->Pi->Evaluate RGB levels->Pi GPIO->Trigger applicable relay. On production broadcast monitor GPIO interface, Pin to GND, i.e. Low 'On', Pin High 'Off', for the respective color of tally status on-screen of monitor. So I just via relay, short pin to GND for the given pin, i.e. color, red or green.

Typical broadcast switchers and cameras... Red is on-air, Green is stand-by or preview. Or none... if camera is not pending preview or on-air.

TCS34725 is the first sensor I am testing, likely using initially, so VEML6040 in 6.12. is cool. As always, thanks for doing this, greatly appreciated!

[Jibun-no-Kage]

You know... I could have sworn I posted this request to the 'firmware' section... Sorry about that. I guess with all the page jumping I was doing... I did not realize I was in the wrong section when I made the request. Thanks for transferring it to the right section/queue.

[pelwell]

See #6448. Wait about 40 minutes for the autobuilds to complete, then run sudo rpi-update pulls/6448 to install a trial kernel, being careful to back up any important data first.