NCT(4) | Device Drivers Manual | NCT(4) |
nct
— Nuvoton
NCT5104D SuperIO driver
nct0 at isa? port ?
nct0 at isa? port 0x2e
nct0 at isa? port 0x4e
gpio* at nct?
The nct
driver supports the GPIO functions
of the NCT5104D. The driver does not support the watchdog function of the
chip. The chip's UARTs are driven by the
com(4) driver.
The probe routine for this device is invasive. The chip will be probed for only if the device is configured into the kernel with a fixed port number (0x2e or 0x4e), or if running on a system that is known to have a NCT5104D, such as the PC Engines APU line of systems.
GPIO pins on this chip are shared with the 3rd UART, 4th UART, a
clock input line, and the watchdog timer. If any these functions have been
enabled by the BIOS, the nct
driver will not take
control of the corresponding GPIO lines. At attach time, the driver logs
which of the 17 GPIO lines are enabled.
The nct
driver first appeared in
NetBSD 10.
If the chip has not been configured in a complete and accurate manner by the BIOS, GPIO lines may be needlessly disabled.
December 21, 2020 | NetBSD 10.99 |