[RFC PATCH V3 0/4] rust/hw: Add the I2C and the first GPIO device

["Chen Miao" <chenmiao@openatom.club>]

We have implemented I2C and the first GPIO device in Rust for QEMU.
Additionally, in the respective patches, we have shared our insights and
experiences regarding the use of Rust for device modeling within QEMU.

1. The first patch implements the BusState for the I2CBus infrastructure.
2. The second patch implements the I2CBus and I2CSlave infrastructure, along
   with a discussion of the challenges encountered during the implementation.
3. The third patch provides a set of necessary helper functions for the PCF8574
   GPIO device.
4. The fourth patch implements the PCF8574 GPIO device, along with a discussion
   of the issues and considerations addressed during the implementation.

Signed-off-by: Chen Miao <chenmiao@openatom.club>
Signed-off-by: Chao Liu <chao.liu@openatom.club>

chenmiao (4):
  rust/hw/core: Add the BusState of rust version
  rust/hw/core: Add rust bindings/funcs for i2c bus
  rust/hw/core: Provide some interfaces for the GPIO device
  rust/hw/gpio: Add the the first gpio device pcf8574

 hw/gpio/Kconfig                  |   5 +
 hw/gpio/meson.build              |   2 +-
 rust/Cargo.lock                  |  18 +-
 rust/Cargo.toml                  |   1 +
 rust/hw/Kconfig                  |   1 +
 rust/hw/core/meson.build         |   2 +
 rust/hw/core/src/bus.rs          |  44 +++++
 rust/hw/core/src/i2c.rs          | 303 +++++++++++++++++++++++++++++++
 rust/hw/core/src/lib.rs          |   6 +
 rust/hw/core/src/qdev.rs         |  17 +-
 rust/hw/core/wrapper.h           |   1 +
 rust/hw/gpio/Kconfig             |   2 +
 rust/hw/gpio/meson.build         |   1 +
 rust/hw/gpio/pcf8574/Cargo.toml  |  28 +++
 rust/hw/gpio/pcf8574/meson.build |  37 ++++
 rust/hw/gpio/pcf8574/src/lib.rs  | 178 ++++++++++++++++++
 rust/hw/meson.build              |   1 +
 17 files changed, 642 insertions(+), 5 deletions(-)
 create mode 100644 rust/hw/core/src/bus.rs
 create mode 100644 rust/hw/core/src/i2c.rs
 create mode 100644 rust/hw/gpio/Kconfig
 create mode 100644 rust/hw/gpio/meson.build
 create mode 100644 rust/hw/gpio/pcf8574/Cargo.toml
 create mode 100644 rust/hw/gpio/pcf8574/meson.build
 create mode 100644 rust/hw/gpio/pcf8574/src/lib.rs

-- 
2.43.0