This patch adds a new device STM32L4x5 GPIO device and is part
of a series implementing the STM32L4x5 with a few peripherals.

Changes from v4 :
- gpio.c : use helpers `is_pull_up()`, `is_pull_down()`, `is_output()`
for more clarity
- gpio.c : correct `update_gpio_idr()` in case of open-drain pin
set to 1 in ODR and set to 0 externally
- gpio.c : rename `get_gpio_pins_to_disconnect()` to
`get_gpio_pinmask_to_disconnect()` and associated comments
- gpio.c : correct coding style issues (alignment and declaration)
- soc.c : unite structs `gpio_addr` and `stm32l4x5_gpio_initval`

Changes from v3 :
- replacing occurences of '16' with the correct macro `GPIO_NUM_PINS`
- updating copyright year
- rebasing on latest version of STM32L4x5 RCC

Changes from v2 :
- correct memory leaks caused by re-assigning a `g_autofree`
pointer without freeing it
- gpio-test : test that reset values (and not just initialization
values) are correct, correct `stm32l4x5_gpio_reset()` accordingly
- adding a `clock-freq-hz` object property to test that
enabling GPIO clock in RCC sets the GPIO clocks

Changes from v1 :
- replacing test GPIO register `DISCONNECTED_PINS` with an object
property accessed using `qtest_qmp()` in the qtest (through helpers
`get_disconnected_pins()` and `disconnect_all_pins()`)
- removing GPIO subclasses and storing MODER, OSPEEDR and PUPDR reset
values in properties
- adding a `name` property and using it for more lisible traces
- using `g_strdup_printf()` to facilitate setting irqs in the qtest,
and initializing GPIO children in soc_initfn

Changes from RFC v1 :
- `stm32l4x5-gpio-test.c` : correct typos, make the test generic,
add a test for bitwise writing in register ODR
- `stm32l4x5_soc.c` : connect gpios to their clock, use an
array of GpioState
- `stm32l4x5_gpio.c` : correct comments in `update_gpio_idr()`,
correct `get_gpio_pins_to_disconnect()`, correct `stm32l4x5_gpio_init()`
and initialize the clock, add a realize function
- update MAINAINERS

Based-on: 20240219200908.49551-1-arnaud.minier@telecom-paris.fr
([PATCH v5 0/8] Add device STM32L4x5 RCC)

Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>

Inès Varhol (3):
  hw/gpio: Implement STM32L4x5 GPIO
  hw/arm: Connect STM32L4x5 GPIO to STM32L4x5 SoC
  tests/qtest: Add STM32L4x5 GPIO QTest testcase

 MAINTAINERS                        |   1 +
 docs/system/arm/b-l475e-iot01a.rst |   2 +-
 include/hw/arm/stm32l4x5_soc.h     |   2 +
 include/hw/gpio/stm32l4x5_gpio.h   |  70 ++++
 hw/arm/stm32l4x5_soc.c             |  68 +++-
 hw/gpio/stm32l4x5_gpio.c           | 477 +++++++++++++++++++++++
 tests/qtest/stm32l4x5_gpio-test.c  | 586 +++++++++++++++++++++++++++++
 hw/arm/Kconfig                     |   3 +-
 hw/gpio/Kconfig                    |   3 +
 hw/gpio/meson.build                |   1 +
 hw/gpio/trace-events               |   6 +
 tests/qtest/meson.build            |   3 +-
 12 files changed, 1205 insertions(+), 17 deletions(-)
 create mode 100644 include/hw/gpio/stm32l4x5_gpio.h
 create mode 100644 hw/gpio/stm32l4x5_gpio.c
 create mode 100644 tests/qtest/stm32l4x5_gpio-test.c

-- 
2.43.2