pci1xxxx_i2c_set_count
pci1xxxx_i2c_set_count(i2c, 1, 1, transferlen);
pci1xxxx_i2c_set_count(i2c, 0, 0, transferlen);
pci1xxxx_i2c_set_count(i2c, actualwritelen, actualwritelen, 0);