start by finding a datasheet. after that it's easy :) Jean Delvare wrote: > Hi all, > > Any reason why we don't have a i2c bus driver for ATI video adapters? > Looks like all other brands are supported (Voodoo and S3 in lm_sensors2 > CVS, Matrox in kernel and Nvidia by the rivatv project) but not ATI. I > do own such an adapter (actually my laptop's video chip) and plan to buy > another one for my desktop system soon. I'd enjoy playing with their I2C > busses if they do have one. > > Where should I start if I want to write a new bus driver for ATI Radeon > chips? > > Thanks. >