Handling panicking while in an ISR. Instead of attempting to call
`pm_device_get` for each character, ensure that the hardware is enabled
when `log_panic` is called.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Allow the log_backend_uart char_out implementation to integrate with
'Device Runtime Power Management'.
Without using runtime PM, it is impossible for the application to manage
the power state of a UART instance, given that any module in the
application could theoretically LOG_* or printk at any point in time.
This removes the need to manually call `pm_device_state_set` when the
lowest power states must be reached, while still allowing log messages
to be output.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
This allows putting the UART backend on a serial device that has to be
quiet unless logging is explicitly enabled at runtime.
Signed-off-by: Armin Brauns <armin.brauns@embedded-solutions.at>
This is mainly to reduce clutter in `subsys/logging`, but also to make
backend management slightly easier.
Signed-off-by: Christopher Friedt <cfriedt@fb.com>
