TCA6424: Linax

Hi Yuta,

We do not provide source code for our IO expanders. 

I am not as familiar with Linux, but I did find some documents describing the I2C driver. 

https://docs.kernel.org/i2c/writing-clients.html

The TCA6424A uses similar register architecture to that of the TCA9539/PCA9539. There has been some example code written for the PCA9539 chip 

https://github.com/torvalds/linux/blob/master/drivers/gpio/gpio-pca953x.c

The only difference would be that TCA6424A has 3 register sets for each type of register rather than 2, since this is a 24-bit IO expander and not a 16-bit. 

Please let me know if this helps answer your question.

Regards,

Tyler