Hello, I have been tasked with writing a driver for a Microchip Quad DAC with EEPROM memory, MCP4728 if you would like to look it up. This device has a feature that I have not come across before, the device's I2C address is set in software and stored in the EEPROM as opposed to using hardware. The factory default address for the MCP4728 is 0x60 and to avoid conflict it needs to be changed. The datasheet tells me I must switch the LDAC pin from high to low at the last bit of the second byte in the I2C message and it must stay low until the end of the third byte. I am wondering if there are any other devices within the kernel source that support this type of address setup? I am assuming that the normal set of I2C/SMBUS functions will not be enough to program a new address since I will need some sort of mechanism to switchthe LDAC pin? Kind regards Wayne -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
