On 12.12.2017 at 23:05, Wolfram Sang wrote: > >> Wolfram, do you have an opinion on the device id check using the >> 0x7c address? > I always thought there should be some core support for that feature, but > IIRC I never knew of any device which had this implemented. But since it > is described in the I2C Specification, it should be in core IMO. > I think one could simply use the code from my patch v3. However, I haven't found any example of such dedicated function (i.e GENERAL_CALL) in the core. Do you have in mind sth like i2c_smbus_write_i2c_device_device_id function ? Cheers, Adrian