This is a Linux driver for the Watchdog functionality of the NCT5104D SuperIO chip.

The NCT5104D is an LPC SuperIO chip that provides:

• Port80 debug output
• 4 x UARTs
• GPIO (muxed with UART C and UART D)
• Watchdog

The datasheet is openly available.

This driver deals only with the watchdog functionality.

The UART functionality is supported by the Linux serial8250 driver as a 16550A device.

GPIO drivers for this chip have been seen on github and linux-gpio mailing lists.

Build the driver:

$ make KDIR=/path/to/kernel-sources/

or

$ export KDIR=/path/to/kernel-sources/
$ make
$ make modules_install