If you don't have swcu050g.pdf from TI, I would suggest you download it from TI. It has a complete description of the I2C registers on the TPS65950. http://www.ti.com/product...0/technicaldocuments


To read and write the I2C registers in Linux, the tools you'll need are i2cset and i2cget. They should be located in the /usr/sbin directory
If for some reason you don't have them or you expect to support block transfers, you can look here http://support.logicpd.co...aft/104/Default.aspx for instructions on building a newer version.


In order to set the VIF_TRI_EN, you'll need to set bit 2 of of the VOICE_IF register (0x0f) in address group 0x49 (See Table 14-28 for details)

/usr/sbin/i2cset -f -y 1 0x49 0x0f 0x04

to test if this was successful, you can read the i2c bus with:

i2cget -f -y 1 0x49 0x0f

Let us know if you have any other issues,

adam