Update serial drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol
to expose the driver and enable it by default based on devicetree.
We remove 'depend on' Kconfig for symbols that would be implied by
the devicetree node existing.
Signed-off-by: Kumar Gala <galak@kernel.org>
Adds driver support for APBUART transmitter and receiver
interrupts. Compatible with APBUART implementations without HW FIFO
interrupt, for example QEMU.
Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
This adds support for the GRLIB APBUART UART peripheral commonly used in
LEON3/4/5 systems.
Driver features:
- Auto-detecting debug FIFO, if configured by GRMON
- Setting and getting UART transfer attributes
- Hardware FIFO if available
- Any number of APBUART devices based on devicetree
- Error status indication
- Polled operation
Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>