| Kernel driver i2c-taos-evm | |
| Author: Jean Delvare <jdelvare@suse.de> | |
| This is a driver for the evaluation modules for TAOS I2C/SMBus chips. | |
| The modules include an SMBus master with limited capabilities, which can | |
| be controlled over the serial port. Virtually all evaluation modules | |
| are supported, but a few lines of code need to be added for each new | |
| module to instantiate the right I2C chip on the bus. Obviously, a driver | |
| for the chip in question is also needed. | |
| Currently supported devices are: | |
| * TAOS TSL2550 EVM | |
| For additional information on TAOS products, please see | |
| http://www.taosinc.com/ | |
| Using this driver | |
| ----------------- | |
| In order to use this driver, you'll need the serport driver, and the | |
| inputattach tool, which is part of the input-utils package. The following | |
| commands will tell the kernel that you have a TAOS EVM on the first | |
| serial port: | |
| # modprobe serport | |
| # inputattach --taos-evm /dev/ttyS0 | |
| Technical details | |
| ----------------- | |
| Only 4 SMBus transaction types are supported by the TAOS evaluation | |
| modules: | |
| * Receive Byte | |
| * Send Byte | |
| * Read Byte | |
| * Write Byte | |
| The communication protocol is text-based and pretty simple. It is | |
| described in a PDF document on the CD which comes with the evaluation | |
| module. The communication is rather slow, because the serial port has | |
| to operate at 1200 bps. However, I don't think this is a big concern in | |
| practice, as these modules are meant for evaluation and testing only. |