net: ag71xx: devm_clk_get_enabled

Allows removal of clk_prepare_enable to simplify the code slightly.

Tested on a TP-LINK Archer C7v2.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20240813170516.7301-2-rosenp@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/atheros/ag71xx.c

@@ -699,29 +699,20 @@ static int ag71xx_mdio_probe(struct ag71xx *ag)
 	np = dev->of_node;
 	ag->mii_bus = NULL;
 
-	ag->clk_mdio = devm_clk_get(dev, "mdio");
+	ag->clk_mdio = devm_clk_get_enabled(dev, "mdio");
 	if (IS_ERR(ag->clk_mdio)) {
 		netif_err(ag, probe, ndev, "Failed to get mdio clk.\n");
 		return PTR_ERR(ag->clk_mdio);
 	}
 
-	err = clk_prepare_enable(ag->clk_mdio);
-	if (err) {
-		netif_err(ag, probe, ndev, "Failed to enable mdio clk.\n");
-		return err;
-	}
-
 	mii_bus = devm_mdiobus_alloc(dev);
-	if (!mii_bus) {
-		err = -ENOMEM;
-		goto mdio_err_put_clk;
-	}
+	if (!mii_bus)
+		return -ENOMEM;
 
 	ag->mdio_reset = of_reset_control_get_exclusive(np, "mdio");
 	if (IS_ERR(ag->mdio_reset)) {
 		netif_err(ag, probe, ndev, "Failed to get reset mdio.\n");
-		err = PTR_ERR(ag->mdio_reset);
-		goto mdio_err_put_clk;
+		return PTR_ERR(ag->mdio_reset);
 	}
 
 	mii_bus->name = "ag71xx_mdio";
@@ -743,22 +734,17 @@ static int ag71xx_mdio_probe(struct ag71xx *ag)
 	err = of_mdiobus_register(mii_bus, mnp);
 	of_node_put(mnp);
 	if (err)
-		goto mdio_err_put_clk;
+		return err;
 
 	ag->mii_bus = mii_bus;
 
 	return 0;
-
-mdio_err_put_clk:
-	clk_disable_unprepare(ag->clk_mdio);
-	return err;
 }
 
 static void ag71xx_mdio_remove(struct ag71xx *ag)
 {
 	if (ag->mii_bus)
 		mdiobus_unregister(ag->mii_bus);
-	clk_disable_unprepare(ag->clk_mdio);
 }
 
 static void ag71xx_hw_stop(struct ag71xx *ag)
@@ -1853,7 +1839,7 @@ static int ag71xx_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	ag->clk_eth = devm_clk_get(&pdev->dev, "eth");
+	ag->clk_eth = devm_clk_get_enabled(&pdev->dev, "eth");
 	if (IS_ERR(ag->clk_eth)) {
 		netif_err(ag, probe, ndev, "Failed to get eth clk.\n");
 		return PTR_ERR(ag->clk_eth);
@@ -1933,19 +1919,13 @@ static int ag71xx_probe(struct platform_device *pdev)
 	netif_napi_add_weight(ndev, &ag->napi, ag71xx_poll,
 			      AG71XX_NAPI_WEIGHT);
 
-	err = clk_prepare_enable(ag->clk_eth);
-	if (err) {
-		netif_err(ag, probe, ndev, "Failed to enable eth clk.\n");
-		return err;
-	}
-
 	ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, 0);
 
 	ag71xx_hw_init(ag);
 
 	err = ag71xx_mdio_probe(ag);
 	if (err)
-		goto err_put_clk;
+		return err;
 
 	platform_set_drvdata(pdev, ndev);
 
@@ -1970,8 +1950,6 @@ static int ag71xx_probe(struct platform_device *pdev)
 
 err_mdio_remove:
 	ag71xx_mdio_remove(ag);
-err_put_clk:
-	clk_disable_unprepare(ag->clk_eth);
 	return err;
 }
 
@@ -1986,7 +1964,6 @@ static void ag71xx_remove(struct platform_device *pdev)
 	ag = netdev_priv(ndev);
 	unregister_netdev(ndev);
 	ag71xx_mdio_remove(ag);
-	clk_disable_unprepare(ag->clk_eth);
 	platform_set_drvdata(pdev, NULL);
 }