The
fdtbus
abstract bus driver is the primary connection and translation layer between
fdt(4)
hardware resources description and
FreeBSD
native newbus device drivers framework.
For an embedded system
fdtbus
represents peripherals typically found on a highly integrated chip
(system-on-chip).
The
fdtbus
driver provides generic, common infrastructure for all
fdt(4)
oriented device drivers, and its main responsibilities are the
following:
- Creating newbus children that reflect
fdt(4)
nodes in the flattened device tree.
- Managing SYS_RES_IRQ resources.
- Managing SYS_RES_MEMORY, SYS_RES_IOPORT resources.
