[PATCH v2 0/2] net, phy, smsc: add posibility to disable energy detect mode

[PATCH v2 0/2] net, phy, smsc: add posibility to disable energy detect mode

[Heiko Schocher]

On some boards the energy enable detect mode leads in
trouble with some switches, so make the enabling of
this mode configurable through DT.
Therefore the property "smsc,disable-energy-detect" is
introduced.

Patch 1 introduces phy-handle support for the ti,cpsw
driver. This is needed now for the smsc phy.

Patch 2 adds the disable energy mode functionality
to the smsc phy

Changes in v2:
- add comments from Florian Fainelli
  - I did not change disable property name into enable
    because I fear to break existing behaviour
  - add smsc vendor prefix
  - remove CONFIG_OF and use __maybe_unused
  - introduce "phy-handle" ability into ti,cpsw
    driver, so I can remove bogus:
      if (!of_node && dev->parent->of_node)
          of_node = dev->parent->of_node;
    construct. Therefore new patch for the ti,cpsw
    driver is necessary.

Heiko Schocher (2):
  drivers: net: cpsw: add phy-handle parsing
  net: phy: smsc: disable energy detect mode

 Documentation/devicetree/bindings/net/cpsw.txt     |  1 +
 .../devicetree/bindings/net/smsc-lan87xx.txt       | 24 ++++++++++++++++++++++
 drivers/net/ethernet/ti/cpsw.c                     | 15 ++++++++++----
 drivers/net/phy/smsc.c                             | 19 ++++++++++++-----
 4 files changed, 50 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/smsc-lan87xx.txt

-- 
2.1.0

[PATCH v2 1/2] drivers: net: cpsw: add phy-handle parsing

[Heiko Schocher]

add the ability to parse "phy-handle". This
is needed for phys, which have a DT node, and
need to parse DT properties.

Signed-off-by: Heiko Schocher <hs@denx.de>
---

Changes in v2: None

 Documentation/devicetree/bindings/net/cpsw.txt |  1 +
 drivers/net/ethernet/ti/cpsw.c                 | 15 +++++++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
index a9df21a..a2cae4e 100644
--- a/Documentation/devicetree/bindings/net/cpsw.txt
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -39,6 +39,7 @@ Required properties:
 Optional properties:
 - dual_emac_res_vlan	: Specifies VID to be used to segregate the ports
 - mac-address		: See ethernet.txt file in the same directory
+- phy-handle		: See ethernet.txt file in the same directory
 
 Note: "ti,hwmods" field is used to fetch the base address and irq
 resources from TI, omap hwmod data base during device registration.
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 8fc90f1..874fb29 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
+#include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/of_device.h>
 #include <linux/if_vlan.h>
@@ -365,6 +366,7 @@ struct cpsw_priv {
 	spinlock_t			lock;
 	struct platform_device		*pdev;
 	struct net_device		*ndev;
+	struct device_node		*phy_node;
 	struct napi_struct		napi_rx;
 	struct napi_struct		napi_tx;
 	struct device			*dev;
@@ -1145,7 +1147,11 @@ static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
 		cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
 				   1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
 
-	slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
+	if (priv->phy_node)
+		slave->phy = of_phy_connect(priv->ndev, priv->phy_node,
+				 &cpsw_adjust_link, 0, slave->data->phy_if);
+	else
+		slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
 				 &cpsw_adjust_link, slave->data->phy_if);
 	if (IS_ERR(slave->phy)) {
 		dev_err(priv->dev, "phy %s not found on slave %d\n",
@@ -1934,11 +1940,12 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
 	slave->port_vlan = data->dual_emac_res_vlan;
 }
 
-static int cpsw_probe_dt(struct cpsw_platform_data *data,
+static int cpsw_probe_dt(struct cpsw_priv *priv,
 			 struct platform_device *pdev)
 {
 	struct device_node *node = pdev->dev.of_node;
 	struct device_node *slave_node;
+	struct cpsw_platform_data *data = &priv->data;
 	int i = 0, ret;
 	u32 prop;
 
@@ -2029,6 +2036,7 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
 		if (strcmp(slave_node->name, "slave"))
 			continue;
 
+		priv->phy_node = of_parse_phandle(slave_node, "phy-handle", 0);
 		parp = of_get_property(slave_node, "phy_id", &lenp);
 		if ((parp == NULL) || (lenp != (sizeof(void *) * 2))) {
 			dev_err(&pdev->dev, "Missing slave[%d] phy_id property\n", i);
@@ -2044,7 +2052,6 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
 		}
 		snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
 			 PHY_ID_FMT, mdio->name, phyid);
-
 		slave_data->phy_if = of_get_phy_mode(slave_node);
 		if (slave_data->phy_if < 0) {
 			dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
@@ -2240,7 +2247,7 @@ static int cpsw_probe(struct platform_device *pdev)
 	/* Select default pin state */
 	pinctrl_pm_select_default_state(&pdev->dev);
 
-	if (cpsw_probe_dt(&priv->data, pdev)) {
+	if (cpsw_probe_dt(priv, pdev)) {
 		dev_err(&pdev->dev, "cpsw: platform data missing\n");
 		ret = -ENODEV;
 		goto clean_runtime_disable_ret;
-- 
2.1.0

[PATCH v2 2/2] net: phy: smsc: disable energy detect mode

[Heiko Schocher]

On some boards the energy enable detect mode leads in
trouble with some switches, so make the enabling of
this mode configurable through DT.

Signed-off-by: Heiko Schocher <hs-ynQEQJNshbs@public.gmane.org>
---

Changes in v2:
- add comments from Florian Fainelli
  - I did not change disable property name into enable
    because I fear to break existing behaviour
  - add smsc vendor prefix
  - remove CONFIG_OF and use __maybe_unused
  - introduce "phy-handle" ability into ti,cpsw
    driver, so I can remove bogus:
      if (!of_node && dev->parent->of_node)
          of_node = dev->parent->of_node;
    construct. Therefore new patch for the ti,cpsw
    driver is necessary.

 .../devicetree/bindings/net/smsc-lan87xx.txt       | 24 ++++++++++++++++++++++
 drivers/net/phy/smsc.c                             | 19 ++++++++++++-----
 2 files changed, 38 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/smsc-lan87xx.txt

diff --git a/Documentation/devicetree/bindings/net/smsc-lan87xx.txt b/Documentation/devicetree/bindings/net/smsc-lan87xx.txt
new file mode 100644
index 0000000..974edd5
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/smsc-lan87xx.txt
@@ -0,0 +1,24 @@
+SMSC LAN87xx Ethernet PHY
+
+Some boards require special tuning values. Configure them
+through an Ethernet OF device node.
+
+Optional properties:
+
+- smsc,disable-energy-detect:
+  If set, do not enable energy detect mode for the SMSC phy.
+  default: enable energy detect mode
+
+Examples:
+smsc phy with disabled energy detect mode on an am335x based board.
+&davinci_mdio {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&davinci_mdio_default>;
+	pinctrl-1 = <&davinci_mdio_sleep>;
+	status = "okay";
+
+	ethernetphy0: ethernet-phy@0 {
+		reg = <0>;
+		smsc,disable-energy-detect;
+	};
+};
diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
index 70b0895..dc2da87 100644
--- a/drivers/net/phy/smsc.c
+++ b/drivers/net/phy/smsc.c
@@ -43,16 +43,25 @@ static int smsc_phy_ack_interrupt(struct phy_device *phydev)
 
 static int smsc_phy_config_init(struct phy_device *phydev)
 {
+	int __maybe_unused len;
+	struct device *dev __maybe_unused = &phydev->dev;
+	struct device_node *of_node __maybe_unused = dev->of_node;
 	int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
+	int enable_energy = 1;
 
 	if (rc < 0)
 		return rc;
 
-	/* Enable energy detect mode for this SMSC Transceivers */
-	rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
-		       rc | MII_LAN83C185_EDPWRDOWN);
-	if (rc < 0)
-		return rc;
+	if (of_find_property(of_node, "smsc,disable-energy-detect", &len))
+		enable_energy = 0;
+
+	if (enable_energy) {
+		/* Enable energy detect mode for this SMSC Transceivers */
+		rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
+			       rc | MII_LAN83C185_EDPWRDOWN);
+		if (rc < 0)
+			return rc;
+	}
 
 	return smsc_phy_ack_interrupt(phydev);
 }
-- 
2.1.0

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Re: [PATCH v2 0/2] net, phy, smsc: add posibility to disable energy detect mode

[David Miller]

From: Heiko Schocher <hs-ynQEQJNshbs@public.gmane.org>
Date: Sat, 17 Oct 2015 06:04:34 +0200

> On some boards the energy enable detect mode leads in
> trouble with some switches, so make the enabling of
> this mode configurable through DT.
> Therefore the property "smsc,disable-energy-detect" is
> introduced.
> 
> Patch 1 introduces phy-handle support for the ti,cpsw
> driver. This is needed now for the smsc phy.
> 
> Patch 2 adds the disable energy mode functionality
> to the smsc phy

Series applied, thanks.
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