i2c-eg20t: Merge two functions

By previous patch, pch_i2c_wait_for_xfer_complete can be merged
to pch_i2c_wait_for_check_xfer.
Signed-off-by: NTomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

drivers/i2c/busses/i2c-eg20t.c

@@ -316,33 +316,6 @@ static void pch_i2c_start(struct i2c_algo_pch_data *adap)
 	pch_setbit(adap->pch_base_address, PCH_I2CCTL, PCH_START);
 }
 
-/**
- * pch_i2c_wait_for_xfer_complete() - initiates a wait for the tx complete event
- * @adap:	Pointer to struct i2c_algo_pch_data.
- */
-static s32 pch_i2c_wait_for_xfer_complete(struct i2c_algo_pch_data *adap)
-{
-	long ret;
-	ret = wait_event_timeout(pch_event,
-			(adap->pch_event_flag != 0), msecs_to_jiffies(1000));
-
-	if (ret == 0) {
-		pch_err(adap, "timeout: %x\n", adap->pch_event_flag);
-		adap->pch_event_flag = 0;
-		return -ETIMEDOUT;
-	}
-
-	if (adap->pch_event_flag & I2C_ERROR_MASK) {
-		pch_err(adap, "error bits set: %x\n", adap->pch_event_flag);
-		adap->pch_event_flag = 0;
-		return -EIO;
-	}
-
-	adap->pch_event_flag = 0;
-
-	return 0;
-}
-
 /**
  * pch_i2c_getack() - to confirm ACK/NACK
  * @adap:	Pointer to struct i2c_algo_pch_data.
@@ -375,27 +348,33 @@ static void pch_i2c_stop(struct i2c_algo_pch_data *adap)
 
 static int pch_i2c_wait_for_check_xfer(struct i2c_algo_pch_data *adap)
 {
-	int rtn;
-
-	rtn = pch_i2c_wait_for_xfer_complete(adap);
-	if (rtn == 0) {
-		if (pch_i2c_getack(adap)) {
-			pch_dbg(adap, "Receive NACK for slave address"
-				"setting\n");
-			return -EIO;
-		}
-	} else if (rtn == -EIO) { /* Arbitration Lost */
+	long ret;
+
+	ret = wait_event_timeout(pch_event,
+			(adap->pch_event_flag != 0), msecs_to_jiffies(1000));
+	if (!ret) {
+		pch_err(adap, "%s:wait-event timeout\n", __func__);
+		adap->pch_event_flag = 0;
+		pch_i2c_stop(adap);
+		pch_i2c_init(adap);
+		return -ETIMEDOUT;
+	}
+
+	if (adap->pch_event_flag & I2C_ERROR_MASK) {
 		pch_err(adap, "Lost Arbitration\n");
+		adap->pch_event_flag = 0;
 		pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMAL_BIT);
 		pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMIF_BIT);
 		pch_i2c_init(adap);
 		return -EAGAIN;
-	} else { /* wait-event timeout */
-		pch_err(adap, "%s(L.%d):wait-event timeout\n",
-			__func__, __LINE__);
-		pch_i2c_stop(adap);
-		pch_i2c_init(adap);
-		return -ETIME;
+	}
+
+	adap->pch_event_flag = 0;
+
+	if (pch_i2c_getack(adap)) {
+		pch_dbg(adap, "Receive NACK for slave address"
+			"setting\n");
+		return -EIO;
 	}
 
 	return 0;