CM3DS: fix compiler warnings

This commit changes the code to fix the compiler warnings on ARM,
GCC_ARM and IAR.

Change-Id: I92676d2cc85daacde9f43f1898377a2cea750c50
Signed-off-by: Hugues de Valon <[email protected]>

Author: hug-dev

targets/TARGET_ARM_SSG/TARGET_CM3DS_MPS2/device/drivers/arm_uart_drv.c

@@ -263,21 +263,24 @@ enum arm_uart_irq_t arm_uart_get_interrupt_status(struct arm_uart_dev_t* dev)
 {
     struct _arm_uart_reg_map_t* p_uart =
                                     (struct _arm_uart_reg_map_t*)dev->cfg->base;
+    enum arm_uart_irq_t intrstatus = ARM_UART_IRQ_NONE;
 
 
     if(dev->data->state & ARM_UART_INITIALIZED) {
         switch(p_uart->intr_reg.intrstatus) {
         case ARM_UART_TX_INTR:
-            return ARM_UART_IRQ_TX;
+            intrstatus = ARM_UART_IRQ_TX;
             break;
         case ARM_UART_RX_INTR:
-            return ARM_UART_IRQ_RX;
+            intrstatus = ARM_UART_IRQ_RX;
             break;
         case ARM_UART_TX_INTR | ARM_UART_RX_INTR:
-            return ARM_UART_IRQ_COMBINED;
+            intrstatus = ARM_UART_IRQ_COMBINED;
+            break;
+        default:
             break;
-        /* default: not defined to force all cases to be handled */
         }
     }
-    return ARM_UART_IRQ_NONE;
+
+    return intrstatus;
 }

targets/TARGET_ARM_SSG/TARGET_CM3DS_MPS2/port_api.c

@@ -25,7 +25,7 @@ PinName port_pin(PortName port, int pin_n)
         return NC;
     }
 
-    return (PINS_PER_GPIO * port + pin_n);
+    return (PinName)(PINS_PER_GPIO * port + pin_n);
 }
 
 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)

targets/TARGET_ARM_SSG/TARGET_CM3DS_MPS2/serial_api.c

@@ -76,8 +76,9 @@ static uint32_t fill_serial_object(struct serial_s *serial_obj, PinName tx,
         return 1;
     }
 
-    uart_peripheral = pinmap_merge(pinmap_peripheral(tx, PinMap_UART_TX),
-                                   pinmap_peripheral(rx, PinMap_UART_RX));
+    uart_peripheral = (UARTName)pinmap_merge(
+                                         pinmap_peripheral(tx, PinMap_UART_TX),
+                                         pinmap_peripheral(rx, PinMap_UART_RX));
 
     switch (uart_peripheral) {
 #ifdef ARM_UART0