Linux v5.4-rc3 - fsi
# SPDX-License-Identifier: GPL-2.0-only
# FSI subsystem
tristate "FSI support"
depends on OF
FSI - the FRU Support Interface - is a simple bus for low-level
access to POWER-based hardware.
bool "Create '/dev/fsi' directory for char devices"
This option causes char devices created for FSI devices to be
located under a common /dev/fsi/ directory. Set to N unless your
userspace has been updated to handle the new location.
Additionally, it also causes the char device names to be offset
by one so that chip 0 will have /dev/scom1 and chip1 /dev/scom2
to match old userspace expectations.
New userspace will use udev rules to generate predictable access
symlinks in /dev/fsi/by-path when this option is enabled.
tristate "GPIO-based FSI master"
depends on GPIOLIB
This option enables a FSI master driver using GPIO lines.
tristate "FSI hub master"
This option enables a FSI hub master driver. Hub is a type of FSI
master that is connected to the upstream master via a slave. Hubs
allow chaining of FSI links to an arbitrary depth. This allows for
a high target device fanout.
tristate "FSI master based on Aspeed ColdFire coprocessor"
depends on GPIOLIB
depends on GPIO_ASPEED
This option enables a FSI master using the AST2400 and AST2500 GPIO
lines driven by the internal ColdFire coprocessor. This requires
the corresponding machine specific ColdFire firmware to be available.
tristate "SCOM FSI client device driver"
This option enables an FSI based SCOM device driver.
tristate "SBEFIFO FSI client device driver"
depends on OF_ADDRESS
This option enables an FSI based SBEFIFO device driver. The SBEFIFO is
a pipe-like FSI device for communicating with the self boot engine
(SBE) on POWER processors.
tristate "OCC SBEFIFO client device driver"
depends on FSI_SBEFIFO
This option enables an SBEFIFO based On-Chip Controller (OCC) device
driver. The OCC is a device embedded on a POWER processor that collects
and aggregates sensor data from the processor and system. The OCC can
provide the raw sensor data as well as perform thermal and power
management on the system.