linuxfs i2c compatibility with Pigpio and the i2c spec dictates these

i2c interface should use a restart between the write and read operation.
--Combined format (see Figure 13). During a change of direction within a transfer,
the START condition and the target address are both repeated, but with the R/W bit
reversed.--
int i2cReadByteData(unsigned handle, unsigned i2cReg) int i2cReadWordData(unsigned handle, unsigned i2cReg)

plugins/pi4j-plugin-linuxfs/src/main/java/com/pi4j/plugin/linuxfs/provider/i2c/LinuxFsI2C.java

@@ -149,27 +149,30 @@ public int writeRegister(byte[] register, byte[] data, int offset, int length) {
     // -------------------------------------------------------------------
 
 
+
     /**
      * {@inheritDoc}
      */
     @Override
     public int readRegister(int register) {
-        return this.i2CBus.execute(this, file -> {
-            file.write(register);
-            return file.read();
-        });
+        byte reg[] = new byte[1];
+        reg[0] = (byte) (register & 0xff);
+        byte buffer[] = new byte[1];
+        this.readRegister(reg, buffer,0,buffer.length);
+        int rVal =  buffer[0] & 0xff;
+        return rVal;
     }
 
     /**
      * {@inheritDoc}
      */
-    @Override
+     @Override
     public int readRegister(int register, byte[] buffer, int offset, int length) {
         Objects.checkFromIndexSize(offset, length, buffer.length);
-        return this.i2CBus.execute(this, file -> {
-            file.write(register);
-            return file.read(buffer, offset, length);
-        });
+         byte reg[] = new byte[1];
+         reg[0] = (byte) (register & 0xff);
+         int rCode = this.readRegister(reg, buffer, offset, length);
+         return rCode;
     }