net: ethernet: fs_enet: simplify clock handling with devm accessors

devm_clock_get_enabled() can be used to simplify clock handling for the
PER register clock.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c

@@ -900,15 +900,10 @@ static int fs_enet_probe(struct platform_device *ofdev)
 	 * but require enable to succeed when a clock was specified/found,
 	 * keep a reference to the clock upon successful acquisition
 	 */
-	clk = devm_clk_get(&ofdev->dev, "per");
-	if (!IS_ERR(clk)) {
-		ret = clk_prepare_enable(clk);
-		if (ret)
+	clk = devm_clk_get_enabled(&ofdev->dev, "per");
+	if (IS_ERR(clk))
 		goto out_deregister_fixed_link;
 
-		fpi->clk_per = clk;
-	}
-
 	privsize = sizeof(*fep) +
 		   sizeof(struct sk_buff **) *
 		     (fpi->rx_ring + fpi->tx_ring) +
@@ -917,7 +912,7 @@ static int fs_enet_probe(struct platform_device *ofdev)
 	ndev = alloc_etherdev(privsize);
 	if (!ndev) {
 		ret = -ENOMEM;
-		goto out_put;
+		goto out_deregister_fixed_link;
 	}
 
 	SET_NETDEV_DEV(ndev, &ofdev->dev);
@@ -979,8 +974,6 @@ static int fs_enet_probe(struct platform_device *ofdev)
 	fep->ops->cleanup_data(ndev);
 out_free_dev:
 	free_netdev(ndev);
-out_put:
-	clk_disable_unprepare(fpi->clk_per);
 out_deregister_fixed_link:
 	of_node_put(fpi->phy_node);
 	if (of_phy_is_fixed_link(ofdev->dev.of_node))
@@ -1001,7 +994,6 @@ static void fs_enet_remove(struct platform_device *ofdev)
 	fep->ops->cleanup_data(ndev);
 	dev_set_drvdata(fep->dev, NULL);
 	of_node_put(fep->fpi->phy_node);
-	clk_disable_unprepare(fep->fpi->clk_per);
 	if (of_phy_is_fixed_link(ofdev->dev.of_node))
 		of_phy_deregister_fixed_link(ofdev->dev.of_node);
 	free_netdev(ndev);

drivers/net/ethernet/freescale/fs_enet/fs_enet.h

@@ -119,8 +119,6 @@ struct fs_platform_info {
 	int napi_weight;	/* NAPI weight			*/
 
 	int use_rmii;		/* use RMII mode		*/
-
-	struct clk *clk_per;	/* 'per' clock for register access */
 };
 
 struct fs_enet_private {