[PATCH v3 0/5] hw/char: Implement the STM32L4x5 USART, UART and LPUART

[Arnaud Minier]

This patch adds the STM32L4x5 USART
(Universal Synchronous/Asynchronous Receiver/Transmitter)
device and is part of a series implementing the
STM32L4x5 with a few peripherals.

It implements the necessary functionalities to receive/send
characters over the serial port, which are useful to
communicate with the program currently running.

Thank you Peter and Thomas for your reviews !

Changes from v1 to v2:
- Use asynchronous transmission for serial communication
  (based on cmsdk-apb-uart implementation)
- Use qemu_log_mask instead of error_report
- Squash the commit that renamed the base struct
- Use switch statements where appropriate
- Fix RDR and TDR mask size
- Increase time limit in tests
- Remove the global qtest in the tests
- Use assert when checking the interrupt number in the tests
- Correct usage of g_autofree in the SoC

Changes from v2 to v3:
- Fix typos and comment formatting
- Declare variables at the start of code blocks in the SoC
- Use %u instead of %x in an error log
- Add ".abstract = true" to the base usart class
- Change tests to use meson harness timeout
- Drop merged RCC commit

Arnaud Minier (5):
  hw/char: Implement STM32L4x5 USART skeleton
  hw/char/stm32l4x5_usart: Enable serial read and write
  hw/char/stm32l4x5_usart: Add options for serial parameters setting
  hw/arm: Add the USART to the stm32l4x5 SoC
  tests/qtest: Add tests for the STM32L4x5 USART

 MAINTAINERS                        |   1 +
 docs/system/arm/b-l475e-iot01a.rst |   2 +-
 hw/arm/Kconfig                     |   1 +
 hw/arm/stm32l4x5_soc.c             |  82 +++-
 hw/char/Kconfig                    |   3 +
 hw/char/meson.build                |   1 +
 hw/char/stm32l4x5_usart.c          | 634 +++++++++++++++++++++++++++++
 hw/char/trace-events               |  12 +
 include/hw/arm/stm32l4x5_soc.h     |   7 +
 include/hw/char/stm32l4x5_usart.h  |  67 +++
 tests/qtest/meson.build            |   4 +-
 tests/qtest/stm32l4x5_usart-test.c | 325 +++++++++++++++
 12 files changed, 1131 insertions(+), 8 deletions(-)
 create mode 100644 hw/char/stm32l4x5_usart.c
 create mode 100644 include/hw/char/stm32l4x5_usart.h
 create mode 100644 tests/qtest/stm32l4x5_usart-test.c

-- 
2.34.1