1 ========================== 1 ==========================
2 Kernel driver i2c-taos-evm 2 Kernel driver i2c-taos-evm
3 ========================== 3 ==========================
4 4
5 Author: Jean Delvare <jdelvare@suse.de> 5 Author: Jean Delvare <jdelvare@suse.de>
6 6
7 This is a driver for the evaluation modules fo 7 This is a driver for the evaluation modules for TAOS I2C/SMBus chips.
8 The modules include an SMBus master with limit 8 The modules include an SMBus master with limited capabilities, which can
9 be controlled over the serial port. Virtually 9 be controlled over the serial port. Virtually all evaluation modules
10 are supported, but a few lines of code need to 10 are supported, but a few lines of code need to be added for each new
11 module to instantiate the right I2C chip on th 11 module to instantiate the right I2C chip on the bus. Obviously, a driver
12 for the chip in question is also needed. 12 for the chip in question is also needed.
13 13
14 Currently supported devices are: 14 Currently supported devices are:
15 15
16 * TAOS TSL2550 EVM 16 * TAOS TSL2550 EVM
17 17
18 For additional information on TAOS products, p 18 For additional information on TAOS products, please see
19 http://www.taosinc.com/ 19 http://www.taosinc.com/
20 20
21 21
22 Using this driver 22 Using this driver
23 ----------------- 23 -----------------
24 24
25 In order to use this driver, you'll need the s 25 In order to use this driver, you'll need the serport driver, and the
26 inputattach tool, which is part of the input-u 26 inputattach tool, which is part of the input-utils package. The following
27 commands will tell the kernel that you have a 27 commands will tell the kernel that you have a TAOS EVM on the first
28 serial port:: 28 serial port::
29 29
30 # modprobe serport 30 # modprobe serport
31 # inputattach --taos-evm /dev/ttyS0 31 # inputattach --taos-evm /dev/ttyS0
32 32
33 33
34 Technical details 34 Technical details
35 ----------------- 35 -----------------
36 36
37 Only 4 SMBus transaction types are supported b 37 Only 4 SMBus transaction types are supported by the TAOS evaluation
38 modules: 38 modules:
39 * Receive Byte 39 * Receive Byte
40 * Send Byte 40 * Send Byte
41 * Read Byte 41 * Read Byte
42 * Write Byte 42 * Write Byte
43 43
44 The communication protocol is text-based and p 44 The communication protocol is text-based and pretty simple. It is
45 described in a PDF document on the CD which co 45 described in a PDF document on the CD which comes with the evaluation
46 module. The communication is rather slow, beca 46 module. The communication is rather slow, because the serial port has
47 to operate at 1200 bps. However, I don't think 47 to operate at 1200 bps. However, I don't think this is a big concern in
48 practice, as these modules are meant for evalu 48 practice, as these modules are meant for evaluation and testing only.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.