linux-kernel - [PATCH net-next v8 12/15] net/fsl: Use [acpi|of]_mdiobus

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Date:   Thu, 10 Jun 2021 19:39:14 +0300
From:   Ioana Ciornei <ciorneiioana@...il.com>
To:     Grant Likely <grant.likely@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Jeremy Linton <jeremy.linton@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Pieter Jansen Van Vuuren <pieter.jansenvv@...boosystems.io>,
        Jon <jon@...id-run.com>, Saravana Kannan <saravanak@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>, calvin.johnson@....com
Cc:     Cristi Sovaiala <cristian.sovaiala@....com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
        Madalin Bucur <madalin.bucur@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Diana Madalina Craciun <diana.craciun@....com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux.cj@...il.com, netdev@...r.kernel.org,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Calvin Johnson <calvin.johnson@....nxp.com>,
        Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH net-next v8 12/15] net/fsl: Use [acpi|of]_mdiobus_register

From: Calvin Johnson <calvin.johnson@....nxp.com>

Depending on the device node type, call the specific OF or ACPI
mdiobus_register function.

Note: For both ACPI and DT cases, endianness of MDIO controller
need to be specified using "little-endian" property.

Signed-off-by: Calvin Johnson <calvin.johnson@....nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---

Changes in v8:
- Directly call the OF or ACPI variants of registering the MDIO bus.
  This is needed because the fwnode_mdio.c module should only implement
  features which can be achieved without going back to the OF/ACPI
  variants. Without this restrictions we directly end up in a dependency
  cycle: of_mdio -> fwnode_mdio -> of_mdio.
- Changed the commit title since the fwnode_mdiobus_register() is no
  longer available

Changes in v7:
- Include fwnode_mdio.h
- Alphabetically sort header inclusions

Changes in v6: None
Changes in v5: None
Changes in v4:
- Cleanup xgmac_mdio_probe()

Changes in v3:
- Avoid unnecessary line removal
- Remove unused inclusion of acpi.h

Changes in v2: None


 drivers/net/ethernet/freescale/xgmac_mdio.c | 30 ++++++++++++++-------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c
index bfa2826c5545..0b68852379da 100644
--- a/drivers/net/ethernet/freescale/xgmac_mdio.c
+++ b/drivers/net/ethernet/freescale/xgmac_mdio.c
@@ -2,6 +2,7 @@
  * QorIQ 10G MDIO Controller
  *
  * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2021 NXP
  *
  * Authors: Andy Fleming <afleming@...escale.com>
  *          Timur Tabi <timur@...escale.com>
@@ -11,15 +12,17 @@
  * kind, whether express or implied.
  */
 
-#include <linux/kernel.h>
-#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/acpi_mdio.h>
 #include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/phy.h>
+#include <linux/kernel.h>
 #include <linux/mdio.h>
+#include <linux/module.h>
 #include <linux/of_address.h>
-#include <linux/of_platform.h>
 #include <linux/of_mdio.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/slab.h>
 
 /* Number of microseconds to wait for a register to respond */
 #define TIMEOUT	1000
@@ -243,10 +246,10 @@ static int xgmac_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
 
 static int xgmac_mdio_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
-	struct mii_bus *bus;
-	struct resource *res;
+	struct fwnode_handle *fwnode;
 	struct mdio_fsl_priv *priv;
+	struct resource *res;
+	struct mii_bus *bus;
 	int ret;
 
 	/* In DPAA-1, MDIO is one of the many FMan sub-devices. The FMan
@@ -279,13 +282,22 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
 		goto err_ioremap;
 	}
 
+	/* For both ACPI and DT cases, endianness of MDIO controller
+	 * needs to be specified using "little-endian" property.
+	 */
 	priv->is_little_endian = device_property_read_bool(&pdev->dev,
 							   "little-endian");
 
 	priv->has_a011043 = device_property_read_bool(&pdev->dev,
 						      "fsl,erratum-a011043");
 
-	ret = of_mdiobus_register(bus, np);
+	fwnode = pdev->dev.fwnode;
+	if (is_of_node(fwnode))
+		ret = of_mdiobus_register(bus, to_of_node(fwnode));
+	else if (is_acpi_node(fwnode))
+		ret = acpi_mdiobus_register(bus, fwnode);
+	else
+		ret = -EINVAL;
 	if (ret) {
 		dev_err(&pdev->dev, "cannot register MDIO bus\n");
 		goto err_registration;
-- 
2.31.1