Caution: This page may contain information that is specific to the legacy version of the driver framework (DFv1).
Depending on the type of log level, by default, log messages are sent to the following logs:
To control which log levels are sent to the syslog (other than
SERIAL), the kernel commandline
driver.<driver_name>.log=<level> can be used. For example,
driver.sdhci.log=TRACE additionally enables
TRACE logs for the sdhci driver, as we are setting a minimum log level, and
TRACE is lower than
A driver's logs are tagged with the process name, “driver”, and the driver name. This can be used to filter the output of the syslog whilst searching for particular logs.
Note: There is both producer and consumer filtering applied to logs. The above covers the producer-side, for more information on the consumer-side, and on how to view driver logs, see viewing logs.