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From:   Marcin Wojtas <mw@semihalf.com>
To:     linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
        netdev@vger.kernel.org
Cc:     rafael@kernel.org, andriy.shevchenko@linux.intel.com,
        sean.wang@mediatek.com, Landen.Chao@mediatek.com,
        linus.walleij@linaro.org, andrew@lunn.ch, vivien.didelot@gmail.com,
        f.fainelli@gmail.com, olteanv@gmail.com, davem@davemloft.net,
        edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
        linux@armlinux.org.uk, hkallweit1@gmail.com, gjb@semihalf.com,
        mw@semihalf.com, jaz@semihalf.com, tn@semihalf.com,
        Samer.El-Haj-Mahmoud@arm.com, upstream@semihalf.com
Subject: [net-next: PATCH v2 8/8] net: dsa: mv88e6xxx: switch to device_/fwnode_ APIs
Date:   Fri, 15 Jul 2022 10:50:12 +0200
Message-Id: <20220715085012.2630214-9-mw@semihalf.com>
In-Reply-To: <20220715085012.2630214-1-mw@semihalf.com>
References: <20220715085012.2630214-1-mw@semihalf.com>
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In order to support both DT and ACPI in future, modify the
mv88e6xx driver  code to use device_/fwnode_ equivalent routines.
No functional change is introduced by this patch.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 57 ++++++++++----------
 1 file changed, 27 insertions(+), 30 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 1baf07b3284b..ca9ae691573e 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3312,7 +3312,7 @@ static int mv88e6xxx_setup_upstream_port(struct mv88e6xxx_chip *chip, int port)
 
 static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
 {
-	struct device_node *phy_handle = NULL;
+	struct fwnode_handle *phy_handle = NULL;
 	struct dsa_switch *ds = chip->ds;
 	struct dsa_port *dp;
 	int tx_amp;
@@ -3499,15 +3499,15 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
 
 	if (chip->info->ops->serdes_set_tx_amplitude) {
 		if (dp)
-			phy_handle = of_parse_phandle(to_of_node(dp->fwnode), "phy-handle", 0);
+			phy_handle = fwnode_find_reference(dp->fwnode, "phy-handle", 0);
 
-		if (phy_handle && !of_property_read_u32(phy_handle,
-							"tx-p2p-microvolt",
-							&tx_amp))
+		if (!IS_ERR(phy_handle) && !fwnode_property_read_u32(phy_handle,
+								     "tx-p2p-microvolt",
+								     &tx_amp))
 			err = chip->info->ops->serdes_set_tx_amplitude(chip,
 								port, tx_amp);
-		if (phy_handle) {
-			of_node_put(phy_handle);
+		if (!IS_ERR(phy_handle)) {
+			fwnode_handle_put(phy_handle);
 			if (err)
 				return err;
 		}
@@ -3891,10 +3891,11 @@ static int mv88e6xxx_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
 }
 
 static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
-				   struct device_node *np,
+				   struct fwnode_handle *fwnode,
 				   bool external)
 {
 	static int index;
+	struct device_node *np = to_of_node(fwnode);
 	struct mv88e6xxx_mdio_bus *mdio_bus;
 	struct mii_bus *bus;
 	int err;
@@ -3973,18 +3974,18 @@ static void mv88e6xxx_mdios_unregister(struct mv88e6xxx_chip *chip)
 }
 
 static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip,
-				    struct device_node *np)
+				    struct fwnode_handle *fwnode)
 {
-	struct device_node *child;
+	struct fwnode_handle *child;
 	int err;
 
 	/* Always register one mdio bus for the internal/default mdio
 	 * bus. This maybe represented in the device tree, but is
 	 * optional.
 	 */
-	child = of_get_child_by_name(np, "mdio");
+	child = fwnode_get_named_child_node(fwnode, "mdio");
 	err = mv88e6xxx_mdio_register(chip, child, false);
-	of_node_put(child);
+	fwnode_handle_put(child);
 	if (err)
 		return err;
 
@@ -3992,13 +3993,13 @@ static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip,
 	 * which say they are compatible with the external mdio
 	 * bus.
 	 */
-	for_each_available_child_of_node(np, child) {
-		if (of_device_is_compatible(
-			    child, "marvell,mv88e6xxx-mdio-external")) {
+	fwnode_for_each_available_child_node(fwnode, child) {
+		if (fwnode_property_match_string(child, "compatible",
+						 "marvell,mv88e6xxx-mdio-external") == 0) {
 			err = mv88e6xxx_mdio_register(chip, child, true);
 			if (err) {
 				mv88e6xxx_mdios_unregister(chip);
-				of_node_put(child);
+				fwnode_handle_put(child);
 				return err;
 			}
 		}
@@ -6975,20 +6976,16 @@ static SIMPLE_DEV_PM_OPS(mv88e6xxx_pm_ops, mv88e6xxx_suspend, mv88e6xxx_resume);
 static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 {
 	struct dsa_mv88e6xxx_pdata *pdata = mdiodev->dev.platform_data;
+	struct fwnode_handle *fwnode = dev_fwnode(&mdiodev->dev);
 	const struct mv88e6xxx_info *compat_info = NULL;
 	struct device *dev = &mdiodev->dev;
-	struct device_node *np = dev->of_node;
 	struct mv88e6xxx_chip *chip;
 	int port;
 	int err;
 
-	if (!np && !pdata)
-		return -EINVAL;
-
-	if (np)
-		compat_info = of_device_get_match_data(dev);
-
-	if (pdata) {
+	if (fwnode)
+		compat_info = device_get_match_data(dev);
+	else if (pdata) {
 		compat_info = pdata_device_get_match_data(dev);
 
 		if (!pdata->netdev)
@@ -7045,9 +7042,9 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 	mv88e6xxx_phy_init(chip);
 
 	if (chip->info->ops->get_eeprom) {
-		if (np)
-			of_property_read_u32(np, "eeprom-length",
-					     &chip->eeprom_len);
+		if (fwnode)
+			device_property_read_u32(dev, "eeprom-length",
+						 &chip->eeprom_len);
 		else
 			chip->eeprom_len = pdata->eeprom_len;
 	}
@@ -7058,8 +7055,8 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 	if (err)
 		goto out;
 
-	if (np) {
-		chip->irq = of_irq_get(np, 0);
+	if (fwnode) {
+		chip->irq = fwnode_irq_get(fwnode, 0);
 		if (chip->irq == -EPROBE_DEFER) {
 			err = chip->irq;
 			goto out;
@@ -7097,7 +7094,7 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 	if (err)
 		goto out_g1_atu_prob_irq;
 
-	err = mv88e6xxx_mdios_register(chip, np);
+	err = mv88e6xxx_mdios_register(chip, fwnode);
 	if (err)
 		goto out_g1_vtu_prob_irq;
 
-- 
2.29.0