netdev - [PATCH (net.git) 2/2] stmmac: fix MDIO settings

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Date:	Wed, 9 Mar 2016 10:00:07 +0100
From:	Giuseppe Cavallaro <peppe.cavallaro@...com>
To:	<netdev@...r.kernel.org>
CC:	<gabriel.fernandez@...aro.org>, <afaerber@...e.de>,
	<fschaefer.oss@...glemail.com>, <dinh.linux@...il.com>,
	<davem@...emloft.net>, Giuseppe Cavallaro <peppe.cavallaro@...com>
Subject: [PATCH (net.git) 2/2] stmmac: fix MDIO settings

Initially the phy_bus_name was added to manipulate the
driver name but It was recently just used to manage the
fixed-link and then to take some decision at run-time
inside the main (for example to skip EEE).

So the patch now introduces a new platforms boolean to
manage that and removes the phy_bus_name variable not
necessary anymore.

The driver can manage the mdio registration by using phy-handle,
dwmac-mdio and own parameter e.g. snps,phy-addr.
This patch takes care about all these possible configurations
and fixes the mdio registration in case of there is a real
transceiver or a switch (that needs to be managed by using
fixed-link).

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Gabriel Fernandez <gabriel.fernandez@...aro.org>
Cc: Andreas Färber <afaerber@...e.de>
Cc: Frank Schäfer <fschaefer.oss@...glemail.com>
Cc: Dinh Nguyen <dinh.linux@...il.com>
Cc: David S. Miller <davem@...emloft.net>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |   11 +++--------
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |   15 ++++++---------
 include/linux/stmmac.h                             |    2 +-
 3 files changed, 10 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c21015b..87e4643 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -271,7 +271,6 @@ static void stmmac_eee_ctrl_timer(unsigned long arg)
  */
 bool stmmac_eee_init(struct stmmac_priv *priv)
 {
-	char *phy_bus_name = priv->plat->phy_bus_name;
 	unsigned long flags;
 	bool ret = false;
 
@@ -283,7 +282,7 @@ bool stmmac_eee_init(struct stmmac_priv *priv)
 		goto out;
 
 	/* Never init EEE in case of a switch is attached */
-	if (phy_bus_name && (!strcmp(phy_bus_name, "fixed")))
+	if (priv->plat->is_fixed_link)
 		goto out;
 
 	/* MAC core supports the EEE feature. */
@@ -820,12 +819,8 @@ static int stmmac_init_phy(struct net_device *dev)
 		phydev = of_phy_connect(dev, priv->plat->phy_node,
 					&stmmac_adjust_link, 0, interface);
 	} else {
-		if (priv->plat->phy_bus_name)
-			snprintf(bus_id, MII_BUS_ID_SIZE, "%s-%x",
-				 priv->plat->phy_bus_name, priv->plat->bus_id);
-		else
-			snprintf(bus_id, MII_BUS_ID_SIZE, "stmmac-%x",
-				 priv->plat->bus_id);
+		snprintf(bus_id, MII_BUS_ID_SIZE, "stmmac-%x",
+			 priv->plat->bus_id);
 
 		snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id,
 			 priv->plat->phy_addr);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 6a52fa1..09684dd 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -138,7 +138,12 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 			return ERR_PTR(-ENODEV);
 
 		plat->phy_node = of_node_get(np);
-	}
+		plat->is_fixed_link = true;
+	} else
+		plat->mdio_bus_data =
+			devm_kzalloc(&pdev->dev,
+				     sizeof(struct stmmac_mdio_bus_data),
+				     GFP_KERNEL);
 
 	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
 	 * and warn of its use. Remove this when phy node support is added.
@@ -146,14 +151,6 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 	if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
 		dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
 
-	if ((plat->phy_node && !of_phy_is_fixed_link(np)) || plat->phy_bus_name)
-		plat->mdio_bus_data = NULL;
-	else
-		plat->mdio_bus_data =
-			devm_kzalloc(&pdev->dev,
-				     sizeof(struct stmmac_mdio_bus_data),
-				     GFP_KERNEL);
-
 	of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
 
 	of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index eead8ab..1550558 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -94,10 +94,10 @@ struct stmmac_dma_cfg {
 };
 
 struct plat_stmmacenet_data {
-	char *phy_bus_name;
 	int bus_id;
 	int phy_addr;
 	int interface;
+	bool is_fixed_link;
 	struct stmmac_mdio_bus_data *mdio_bus_data;
 	struct device_node *phy_node;
 	struct stmmac_dma_cfg *dma_cfg;
-- 
1.7.4.4