On 11/16/16 15:33, Rob Herring wrote: >> +Optional properties >> > + - reg: I2C address. If and only if present the driver node >> > + should be placed into the i2c controller node where the >> > + tfp410 i2c is connected to (the current implementation does >> > + not yet support this). > So this chip can work without programming I guess? > Yes. Just powering it up is enough for most application. > reg should only be not present if I2C is not connected in the design. It > can't be a function of what the driver supports. In otherwords, you > can't be moving this node around based on when you add I2C control. > Ok, I'll try to implement a dummy i2c driver at the same time too. I can not test anything related to it because I do not have a piece of HW with tfp410 i2c wires connected, but it should not matter as long as I am able to probe it as a i2c client. Thanks, Jyri -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html