Improved Linux GPIO Driver Using Chardev (#2943)

* Linux GPIO Driver refactor WIP

* Initial new GPIO driver

* Fixing toolchain warning

* Adding GPIO interface

* Adding in more states

* Added interrupts to GPIO driver

* Fixing build errors

* Formatting GPIO driver

* Fix spelling

* Fixing config check

* Quality status

* Review fixes

* Clearing GPIO struct values

* Updating to new RawTime

* Fixing take -> now

* Fixing quality error

* Fixing second review comments

* Tested: read, write, interupt rising/falling/both

* Final review comment

.github/actions/spelling/expect.txt

@@ -120,6 +120,7 @@ changeme
 CHANNELID
 CHANS
 Chieu
+CHIPINFO
 CHK
 CHNG
 CIRCULARSTATE
@@ -284,6 +285,7 @@ EVENTARRAY
 EVENTBOOL
 EVENTID
 eventname
+eventflags
 EVENTPRIMITIVE
 evr
 evt
@@ -366,6 +368,10 @@ Gorang
 GPGGA
 GPINT
 gpio
+gpiochip
+gpioevent
+gpiohandle
+gpioline
 Graphviz
 grayscales
 grnd
@@ -376,6 +382,7 @@ gtest
 gtimeout
 Guire
 handcoded
+handleflags
 hardtoaccess
 hashvalue
 hdr
@@ -491,7 +498,10 @@ libiconv
 LIBLOC
 lic
 lindent
+LINEEVENT
+LINEHANDLE
 linelength
+lineoffset
 lineroo
 listdir
 Listst
@@ -882,7 +892,6 @@ subhist
 subhistory
 subseconds
 subtargets
-subtopologies
 subtopology
 suppr
 suseconds

Drv/GpioDriverPorts/GpioDriverPorts.fpp

@@ -1,15 +1,24 @@
+module Drv {
+  enum GpioStatus {
+    OP_OK @< Operation succeeded
+    NOT_OPENED @< Pin was never opened
+    INVALID_MODE @< Operation not permitted with current configuration
+    UNKNOWN_ERROR @< An unknown error occurred
+  }
+}
+
 module Drv {
 
   port GpioWrite(
                   $state: Fw.Logic
-                )
+                ) -> GpioStatus
 
 }
 
 module Drv {
 
   port GpioRead(
                  ref $state: Fw.Logic
-               )
+               ) -> GpioStatus
 
 }

Drv/Interfaces/GpioInterface.fppi

@@ -0,0 +1,9 @@
+
+@ Port used to write to a GPIO pin
+sync input port gpioWrite: Drv.GpioWrite
+
+@ Port used to read from a GPIO pin
+sync input port gpioRead: Drv.GpioRead
+
+@ Port used to indicate transition on the GPIO pin
+output port gpioInterrupt: Svc.Cycle

Drv/LinuxGpioDriver/CMakeLists.txt

@@ -12,15 +12,15 @@ endif()
 if(FPRIME_USE_STUBBED_DRIVERS)
     set(SOURCE_FILES
         "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriver.fpp"
-        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverComponentImplCommon.cpp"
-        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverComponentImplStub.cpp"
+        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverCommon.cpp"
+        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverStub.cpp"
     )
     register_fprime_module()
 elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
     set(SOURCE_FILES
         "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriver.fpp"
-        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverComponentImplCommon.cpp"
-        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverComponentImpl.cpp"
+        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriverCommon.cpp"
+        "${CMAKE_CURRENT_LIST_DIR}/LinuxGpioDriver.cpp"
     )
     register_fprime_module()
 endif()