libraries: Wire: Add member variable i2c_dev

Add member variable i2c_dev to Wire to hold it own i2c
device instance.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>

Author: soburi

libraries/Wire/Wire.cpp

@@ -5,6 +5,9 @@
  */
 
 #include <Wire.h>
+arduino::ZephyrI2C::ZephyrI2C(const struct device *i2c) : i2c_dev(i2c)
+{
+}
 
 void arduino::ZephyrI2C::begin() {
   ring_buf_init(&rxRingBuffer.rb, sizeof(rxRingBuffer.buffer), rxRingBuffer.buffer);
@@ -101,4 +104,4 @@ void arduino::ZephyrI2C::flush() {}
 void arduino::ZephyrI2C::onReceive(voidFuncPtrParamInt cb) {}
 void arduino::ZephyrI2C::onRequest(voidFuncPtr cb) {}
 
-arduino::ZephyrI2C Wire;
+arduino::ZephyrI2C Wire(i2c_dev);

libraries/Wire/Wire.h

@@ -17,6 +17,8 @@ namespace arduino {
 
 class ZephyrI2C : public HardwareI2C {
 public:
+  ZephyrI2C(const struct device* i2c);
+
   virtual void begin();
   virtual void end();
   virtual void begin(uint8_t address);
@@ -50,10 +52,11 @@ class ZephyrI2C : public HardwareI2C {
     uint8_t buffer[256];
   };
   struct rx_ring_buf rxRingBuffer;
+  const struct device* i2c_dev;
 };
 
 } // namespace arduino
 
 extern arduino::ZephyrI2C Wire;
 
-typedef arduino::ZephyrI2C TwoWire;
+typedef arduino::ZephyrI2C TwoWire;