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AMDSBWD(4)            DragonFly Kernel Interfaces Manual            AMDSBWD(4)

NAME
     amdsbwd - device driver for the AMD southbridge and FCH watchdog timers

SYNOPSIS
     To compile this driver into the kernel, place the following line in your
     kernel configuration file:

           device amdsbwd

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

           amdsbwd_load="YES"

DESCRIPTION
     The amdsbwd driver provides watchdog(4) support for the watchdog timers
     present on the supported chipsets.

HARDWARE
     The amdsbwd driver supports the following chipsets:

     *   AMD SB600/7x0/8x0/9x0 southbridges
     *   AMD Axx/Hudson/Bolton FCHs
     *   AMD FCHs integrated into Family 15h Models 60h-6Fh and 70h-7Fh
         processors
     *   AMD FCHs integrated into Family 16h Models 00h-0Fh and 30h-3Fh
         processors
     *   AMD FCH watchdogs on Zen-era systems with CZ SMBus revision 0x51 or
         newer

SEE ALSO
     watchdog(4), watchdogd(8)

HISTORY
     The amdsbwd driver first appeared in FreeBSD 7.3 and FreeBSD 8.1.

AUTHORS
     The amdsbwd driver was written by Andriy Gapon <avg@FreeBSD.org>.  This
     manual page was written by Andriy Gapon <avg@FreeBSD.org>.

DragonFly 6.5-DEVELOPMENT        July 19, 2026       DragonFly 6.5-DEVELOPMENT