linux-kernel - [PATCH net-next 2/5] net/fsl: xgmac_mdio: Use managed device resources

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Message-Id: <20220126101432.822818-3-tobias@waldekranz.com>
Date:   Wed, 26 Jan 2022 11:14:29 +0100
From:   Tobias Waldekranz <tobias@...dekranz.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Marcin Wojtas <mw@...ihalf.com>,
        Calvin Johnson <calvin.johnson@....nxp.com>,
        Markus Koch <markus@...syncing.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 2/5] net/fsl: xgmac_mdio: Use managed device resources

All of the resources used by this driver has managed interfaces, so
use them. Heed the warning in the comment before platform_get_resource
and use a bare devm_ioremap to allow for non-exclusive access to the
IO memory.

Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
---
 drivers/net/ethernet/freescale/xgmac_mdio.c | 35 ++++-----------------
 1 file changed, 6 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c
index 266e562bd67a..40442d64a247 100644
--- a/drivers/net/ethernet/freescale/xgmac_mdio.c
+++ b/drivers/net/ethernet/freescale/xgmac_mdio.c
@@ -273,7 +273,7 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	bus = mdiobus_alloc_size(sizeof(struct mdio_fsl_priv));
+	bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(struct mdio_fsl_priv));
 	if (!bus)
 		return -ENOMEM;
 
@@ -284,13 +284,11 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
 	bus->probe_capabilities = MDIOBUS_C22_C45;
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%pa", &res->start);
 
-	/* Set the PHY base address */
 	priv = bus->priv;
-	priv->mdio_base = ioremap(res->start, resource_size(res));
-	if (!priv->mdio_base) {
-		ret = -ENOMEM;
-		goto err_ioremap;
-	}
+	priv->mdio_base = devm_ioremap(&pdev->dev, res->start,
+				       resource_size(res));
+	if (IS_ERR(priv->mdio_base))
+		return PTR_ERR(priv->mdio_base);
 
 	/* For both ACPI and DT cases, endianness of MDIO controller
 	 * needs to be specified using "little-endian" property.
@@ -312,31 +310,11 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
 		ret = -EINVAL;
 	if (ret) {
 		dev_err(&pdev->dev, "cannot register MDIO bus\n");
-		goto err_registration;
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, bus);
 
-	return 0;
-
-err_registration:
-	iounmap(priv->mdio_base);
-
-err_ioremap:
-	mdiobus_free(bus);
-
-	return ret;
-}
-
-static int xgmac_mdio_remove(struct platform_device *pdev)
-{
-	struct mii_bus *bus = platform_get_drvdata(pdev);
-	struct mdio_fsl_priv *priv = bus->priv;
-
-	mdiobus_unregister(bus);
-	iounmap(priv->mdio_base);
-	mdiobus_free(bus);
-
 	return 0;
 }
 
@@ -364,7 +342,6 @@ static struct platform_driver xgmac_mdio_driver = {
 		.acpi_match_table = xgmac_acpi_match,
 	},
 	.probe = xgmac_mdio_probe,
-	.remove = xgmac_mdio_remove,
 };
 
 module_platform_driver(xgmac_mdio_driver);
-- 
2.25.1