i2c: iproc: Add support for more master error status

Add support for more master error status including FIFO underrun and RX
FIFO full

Signed-off-by: Michael Cheng <ccheng@broadcom.com>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-bcm-iproc.c

@@ -73,6 +73,8 @@
 #define M_CMD_STATUS_NACK_ADDR       0x2
 #define M_CMD_STATUS_NACK_DATA       0x3
 #define M_CMD_STATUS_TIMEOUT         0x4
+#define M_CMD_STATUS_FIFO_UNDERRUN   0x5
+#define M_CMD_STATUS_RX_FIFO_FULL    0x6
 #define M_CMD_PROTOCOL_SHIFT         9
 #define M_CMD_PROTOCOL_MASK          0xf
 #define M_CMD_PROTOCOL_BLK_WR        0x7
@@ -536,6 +538,14 @@ static int bcm_iproc_i2c_check_status(struct bcm_iproc_i2c_dev *iproc_i2c,
 		dev_dbg(iproc_i2c->device, "bus timeout\n");
 		return -ETIMEDOUT;
 
+	case M_CMD_STATUS_FIFO_UNDERRUN:
+		dev_dbg(iproc_i2c->device, "FIFO under-run\n");
+		return -ENXIO;
+
+	case M_CMD_STATUS_RX_FIFO_FULL:
+		dev_dbg(iproc_i2c->device, "RX FIFO full\n");
+		return -ETIMEDOUT;
+
 	default:
 		dev_dbg(iproc_i2c->device, "unknown error code=%d\n", val);