The pwrseqd is a replacement for the CPLD found on modern server mainboards. It has to be run on the BMC capable of controlling all power VRs, monitoring all rails, controlling GPIOs and doing thermal management. This software is meant to be used on OpenBmc.
Detailed implementation can be found in HighLevelOverview.
The whole application is designed around Linux kernel features and requires the following options to be enabled:
CONFIG_REGULATOR=y
CONFIG_REGULATOR_NETLINK_EVENTS=y
CONFIG_REGULATOR_USERSPACE_CONSUMER=y
CONFIG_GPIO=y
CONFIG_GPIO_CDEV=y
mkdir build
cd build
cmake ..
make- libyaml-cpp
- libgpiod
- libgpiodcxx
- libpthread
- libbsdbusplus
- libphosphor-logging
The program needs one or multiple configuration file in YAML syntax to operate. The configuration describes the power sequencing, which is very similar to the verilog/VHDL code used to compiled into a CPLD bitstream.
Configuration files are merged on program startup. For details see Configuration file layout.
Also see special signals Predefined signals.
Apache License
Version 2.0, January 2004