* Implemented driver for MCP23017
* fixed compatability with mcp23009. (naming of instantiated GPIO-Devices)
* removed some comments
* removed even more comments
* commented out instatntiation of driver since it will not be used with v6x
* removed last useless comments
* re-activated gpio_mcp23009 driver, removed useless comments and empty lines
* removed empty lines at the end of mcp23017.cpp
* removed empty line
* Implemented driver for MCP23017
* fixed compatability with mcp23009. (naming of instantiated GPIO-Devices)
* removed some comments
* removed even more comments
* commented out instatntiation of driver since it will not be used with v6x
* removed last useless comments
* re-activated gpio_mcp23009 driver, removed useless comments and empty lines
* removed empty lines at the end of mcp23017.cpp
* removed empty line
* basic working implementation
* first improved driver version with shared code base for MCP23009 & MCP23017 (built as state machine with sanity checks)
* removed unused imports
* changed module name from MCP to MCP230XX
* removed debug print statements
* adjusted auto start command of driver
* removed comments
* -added seperate main functions for both derivative modules (mcp23009 and mcp23017)
* compile common functions as shared library in src/lib/drivers
* fixed cleanup of modules
* ->unclean working version with shared common library
* used make format
* working & cleaned version
* -> Added CallbackHandler to be able to use multiple reading GPIO-expanders simultaneously
-> Removed old mcap23009 calls and pin registrations
-> Adjusted GpioIn.msg to contain MAX_INSTANCES
* ->removed unused imports
->used make format
* Fix: Re-enabled platform_mcp_gpio for accton-godwit, cuav, fmu-v5x
* Fix: enabled platform_mcp_gpio in px4/fmu-v5x
* added depency to fmu-v5x
* Fix: removed new lines
* Fix: fixed linker errors
* removed unused linkage against mcp-library
* Made mcp start calls consistent for fmu-v5x and fmu-v6x
* moved logging of comm errors to read/write function directly
* added perf_count for sanity_check
* removed error message
* ensured member variables follow naming convention
* added retries to probe function
* simplyfied state-logic
* add break to terminate loop early
* ensured clean state when register_gpios() fails
* add registered-flag to pins
* used path from top dir instead of relative path in CMakeLists
* used constexpr to set parameters instead of calculating them at runtime
* style: used make format
* fix: corrected i2c_bus assignment
* style: init input of callbackhandler to 0
* fix: mark pin as registered if successful
* style: made arguments const type
---------
Co-authored-by: Alexander Lerach <alexander@auterion.com>
Alexander Lerach