FDTBUS(4) BSD Kernel Interfaces Manual FDTBUS(4)NAME
fdtbus -- Flattened Device Tree bus driver
SYNOPSIS
options FDT
DESCRIPTION
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 fol-
lowing:
o Creating newbus children that reflect fdt(4) nodes in the flattened device tree.
o Managing SYS_RES_IRQ resources.
o Managing SYS_RES_MEMORY, SYS_RES_IOPORT resources.
SEE ALSO fdt(4), openfirm(4), simplebus(4)STANDARDS
IEEE Std 1275: IEEE Standard for Boot (Initialization Configuration) Firmware: Core Requirements and Practices (Open Firmware).
Power.org Standard for Embedded Power Architecture Platform Requirements (ePAPR).
HISTORY
The fdtbus support first appeared in FreeBSD 9.0.
AUTHORS
The fdtbus support was developed by Semihalf under sponsorship from the FreeBSD Foundation. This manual page was written by Rafal Jaworowski.
BSD July 12, 2010 BSD
Check Out this Related Man Page
VIAPM(4) BSD Kernel Interfaces Manual VIAPM(4)NAME
viapm -- VIA chipsets Power Management controller driver
SYNOPSIS
device iicbb
device iicbus
device iicsmb
device smbus
device smb
device viapm
DESCRIPTION
This driver provides access to the VIA chipset Power Management Unit family. They are VT82C586B, VT82C596A, VT82C596B, VT82C686A and VT8233.
The embedded controller of the VIA chipset may give you access to the monitoring facilities of your mainboard.
The 586B support is made by software whereas other controllers support the SMBus protocol by hardware. See smb(4) for writing user code to
fetch voltages, temperature and so on from the monitoring chip of your mainboard.
SEE ALSO iicbb(4), iicbus(4), iicsmb(4), smb(4), smbus(4)HISTORY
The viapm manual page first appeared in FreeBSD 4.5.
AUTHORS
This manual page was written by Nicolas Souchu <nsouch@FreeBSD.org>.
BUGS
Only polling mode is supported.
BSD April 20, 2002 BSD
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