netdev - [RESEND] [PATCH v4] sh_eth: update OF PHY registeration

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Date:	Wed, 26 Feb 2014 18:23:28 +0000
From:	Ben Dooks <ben.dooks@...ethink.co.uk>
To:	netdev@...r.kernel.org
Cc:	linux-sh@...r.kernel.org, sergei.shtylyov@...entembedded.com,
	nobuhiro.iwamatsu.yj@...esas.com, magnus.damn@...nsource.se,
	horms@...ge.net.au, Ben Dooks <ben.dooks@...ethink.co.uk>
Subject: [RESEND] [PATCH v4] sh_eth: update OF PHY registeration

If the sh_eth device is registered using OF, then the driver
should call of_mdiobus_register() to register any PHYs connected
to the system and of_phy_connect() to connect it.

This ensures that any PHYs registered in the device tree are
appropriately connected to the parent devices nodes so that
the PHY drivers can access their OF properties.

Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>

--
v2:
	- allocate mdio->irq array at init time
	- set devdata after succesful mdio registration
v3:
	- do not parse phy->irq in of setup (done by of_mdiobus)
	- use of_phy_connect to connect phy
v4:
	- fix review comments on code
	- reword patch description
	- change if to be two way in mdio init code
---
 drivers/net/ethernet/renesas/sh_eth.c | 57 +++++++++++++++++++++++------------
 1 file changed, 38 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index a18cbe1..e597698 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -40,6 +40,7 @@
 #include <linux/if_vlan.h>
 #include <linux/clk.h>
 #include <linux/sh_eth.h>
+#include <linux/of_mdio.h>
 
 #include "sh_eth.h"
 
@@ -1761,20 +1762,36 @@ static void sh_eth_adjust_link(struct net_device *ndev)
 /* PHY init function */
 static int sh_eth_phy_init(struct net_device *ndev)
 {
+	struct device_node *np = ndev->dev.parent->of_node;
 	struct sh_eth_private *mdp = netdev_priv(ndev);
-	char phy_id[MII_BUS_ID_SIZE + 3];
 	struct phy_device *phydev = NULL;
 
-	snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
-		 mdp->mii_bus->id, mdp->phy_id);
-
 	mdp->link = 0;
 	mdp->speed = 0;
 	mdp->duplex = -1;
 
 	/* Try connect to PHY */
-	phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
-			     mdp->phy_interface);
+	if (np) {
+		struct device_node *pn;
+
+		pn = of_parse_phandle(np, "phy-handle", 0);
+		phydev = of_phy_connect(ndev, pn,
+					sh_eth_adjust_link, 0,
+					mdp->phy_interface);
+
+		if (!phydev)
+			phydev = ERR_PTR(-ENOENT);
+	} else {
+		char phy_id[MII_BUS_ID_SIZE + 3];
+
+		snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
+			 mdp->mii_bus->id, mdp->phy_id);
+
+		/* Try connect to PHY */
+		phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
+				     mdp->phy_interface);
+	}
+
 	if (IS_ERR(phydev)) {
 		dev_err(&ndev->dev, "phy_connect failed\n");
 		return PTR_ERR(phydev);
@@ -2638,15 +2655,23 @@ static int sh_mdio_init(struct net_device *ndev, int id,
 		goto out_free_bus;
 	}
 
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		mdp->mii_bus->irq[i] = PHY_POLL;
-	if (pd->phy_irq > 0)
-		mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
+	if (ndev->dev.parent->of_node) {
+		ret = of_mdiobus_register(mdp->mii_bus,
+					  ndev->dev.parent->of_node);
+	} else {
+		for (i = 0; i < PHY_MAX_ADDR; i++)
+			mdp->mii_bus->irq[i] = PHY_POLL;
+		if (pd->phy_irq > 0)
+			mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
 
-	/* register mdio bus */
-	ret = mdiobus_register(mdp->mii_bus);
-	if (ret)
+		/* register mdio bus */
+		ret = mdiobus_register(mdp->mii_bus);
+	}
+
+	if (ret) {
+		dev_err(&ndev->dev, "failed to register mdio\n");
 		goto out_free_bus;
+	}
 
 	dev_set_drvdata(&ndev->dev, mdp->mii_bus);
 
@@ -2719,7 +2744,6 @@ static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
 {
 	struct device_node *np = dev->of_node;
 	struct sh_eth_plat_data *pdata;
-	struct device_node *phy;
 	const char *mac_addr;
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
@@ -2728,11 +2752,6 @@ static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
 
 	pdata->phy_interface = of_get_phy_mode(np);
 
-	phy = of_parse_phandle(np, "phy-handle", 0);
-	if (of_property_read_u32(phy, "reg", &pdata->phy))
-		return NULL;
-	pdata->phy_irq = irq_of_parse_and_map(phy, 0);
-
 	mac_addr = of_get_mac_address(np);
 	if (mac_addr)
 		memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
-- 
1.8.5.3

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