The
gpioow driver allows bit-banging a 1-Wire bus as a master using one GPIO pin. The pin is used as a data signal. The GPIO pin must be able to drive an output and read an input.
The pin number is specified in the kernel configuration with the
offset locator. The
mask locator should always be 0x1. The
offset and
mask can also be specified when
gpioow is attached at runtime using the
GPIOATTACH ioctl(2) on the
gpio(4) device.