| commit | 61baea42b86c74f5c6350f669f889d9d2a728be4 | [log] [tgz] |
|---|---|---|
| author | Zev Weiss <zev@bewilderbeest.net> | Wed Oct 12 03:06:47 2022 -0700 |
| committer | Zev Weiss <zev@bewilderbeest.net> | Wed Oct 12 18:23:30 2022 +0000 |
| tree | 893ba4f4888045be4f5c0745eb39f49295d4572b | |
| parent | 8569bf2a036ae4015d911c9baa28195ee9b38b9f [diff] |
hwmontempsensor: Remove redundant emptiness check If the paths vector is empty the for loop iterating over it won't do anything, and since there's nothing after the loop there's no need to check and return early. Signed-off-by: Zev Weiss <zev@bewilderbeest.net> Change-Id: I58a23919eec1c51efc2897a71f8cb38c1b8e3d0b
dbus-sensors is a collection of sensor applications that provide the xyz.openbmc_project.Sensor collection of interfaces. They read sensor values from hwmon, d-bus, or direct driver access to provide readings. Some advance non-sensor features such as fan presence, pwm control, and automatic cpu detection (x86) are also supported.
runtime re-configurable from d-bus (entity-manager or the like)
isolated: each sensor type is isolated into its own daemon, so a bug in one sensor is unlikely to affect another, and single sensor modifications are possible
async single-threaded: uses sdbusplus/asio bindings
multiple data inputs: hwmon, d-bus, direct driver access
A typical dbus-sensors object support the following dbus interfaces:
Path /xyz/openbmc_project/sensors/<type>/<sensor_name>
Interfaces xyz.openbmc_project.Sensor.Value
xyz.openbmc_project.Sensor.Threshold.Critical
xyz.openbmc_project.Sensor.Threshold.Warning
xyz.openbmc_project.State.Decorator.Availability
xyz.openbmc_project.State.Decorator.OperationalStatus
xyz.openbmc_project.Association.Definitions
Sensor interfaces collection are described here.
Consumer examples of these interfaces are Redfish, Phosphor-Pid-Control, IPMI SDR.
dbus-sensor daemons are reactors that dynamically create and update sensors configuration when system configuration gets updated.
Using asio timers and async calls, dbus-sensor daemons read sensor values and check thresholds periodically. PropertiesChanged signals will be broadcasted for other services to consume when value or threshold status change. OperationStatus is set to false if the sensor is determined to be faulty.
A simple sensor example can be found here.
Sensor devices are described using Exposes records in configuration file. Name and Type fields are required. Different sensor types have different fields. Refer to entity manager schema for complete list.