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Message-ID: <20090319050026.11320.23198.stgit@localhost.localdomain>
Date: Wed, 18 Mar 2009 23:00:27 -0600
From: Grant Likely <grant.likely@...retlab.ca>
To: linuxppc-dev@...abs.org, netdev@...r.kernel.org,
afleming@...escale.com, avorontsov@...mvista.com,
davem@...emloft.net, galak@...nel.crashing.org
Subject: [PATCH 3/9] phylib: add *_direct() variants of phy_connect and
phy_attach functions
From: Grant Likely <grant.likely@...retlab.ca>
Add phy_connect_direct() and phy_attach_direct() functions so that
drivers can use a pointer to the phy_device instead of trying to determine
the phy's bus_id string.
This patch is useful for OF device tree descriptions of phy devices where
the driver doesn't need or know what the bus_id value in order to get a
phy_device pointer.
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
---
drivers/net/phy/phy_device.c | 118 ++++++++++++++++++++++++++++++------------
include/linux/phy.h | 5 ++
2 files changed, 90 insertions(+), 33 deletions(-)
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 793332f..238d21e 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -290,6 +290,33 @@ void phy_prepare_link(struct phy_device *phydev,
}
/**
+ * phy_connect_direct - connect an ethernet device to a specific phy_device
+ * @dev: the network device to connect
+ * @phydev: the pointer to the phy device
+ * @handler: callback function for state change notifications
+ * @flags: PHY device's dev_flags
+ * @interface: PHY device's interface
+ */
+int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
+ void (*handler)(struct net_device *), u32 flags,
+ phy_interface_t interface)
+{
+ int rc;
+
+ rc = phy_attach_direct(dev, phydev, flags, interface);
+ if (rc)
+ return rc;
+
+ phy_prepare_link(phydev, handler);
+ phy_start_machine(phydev, NULL);
+ if (phydev->irq > 0)
+ phy_start_interrupts(phydev);
+
+ return 0;
+}
+EXPORT_SYMBOL(phy_connect_direct);
+
+/**
* phy_connect - connect an ethernet device to a PHY device
* @dev: the network device to connect
* @bus_id: the id string of the PHY device to connect
@@ -310,18 +337,21 @@ struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
phy_interface_t interface)
{
struct phy_device *phydev;
+ struct device *d;
+ int rc;
- phydev = phy_attach(dev, bus_id, flags, interface);
-
- if (IS_ERR(phydev))
- return phydev;
-
- phy_prepare_link(phydev, handler);
-
- phy_start_machine(phydev, NULL);
+ /* Search the list of PHY devices on the mdio bus for the
+ * PHY with the requested name */
+ d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
+ if (!d) {
+ pr_err("PHY %s not found\n", bus_id);
+ return ERR_PTR(-ENODEV);
+ }
+ phydev = to_phy_device(d);
- if (phydev->irq > 0)
- phy_start_interrupts(phydev);
+ rc = phy_attach_direct(dev, phydev, flags, interface);
+ if (rc)
+ return ERR_PTR(rc);
return phydev;
}
@@ -345,9 +375,9 @@ void phy_disconnect(struct phy_device *phydev)
EXPORT_SYMBOL(phy_disconnect);
/**
- * phy_attach - attach a network device to a particular PHY device
+ * phy_attach_direct - attach a network device to a given PHY device pointer
* @dev: network device to attach
- * @bus_id: PHY device to attach
+ * @phydev: Pointer to phy_device to attach
* @flags: PHY device's dev_flags
* @interface: PHY device's interface
*
@@ -358,22 +388,10 @@ EXPORT_SYMBOL(phy_disconnect);
* the attaching device, and given a callback for link status
* change. The phy_device is returned to the attaching driver.
*/
-struct phy_device *phy_attach(struct net_device *dev,
- const char *bus_id, u32 flags, phy_interface_t interface)
+int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
+ u32 flags, phy_interface_t interface)
{
- struct bus_type *bus = &mdio_bus_type;
- struct phy_device *phydev;
- struct device *d;
-
- /* Search the list of PHY devices on the mdio bus for the
- * PHY with the requested name */
- d = bus_find_device_by_name(bus, NULL, bus_id);
- if (d) {
- phydev = to_phy_device(d);
- } else {
- printk(KERN_ERR "%s not found\n", bus_id);
- return ERR_PTR(-ENODEV);
- }
+ struct device *d = &phydev->dev;
/* Assume that if there is no driver, that it doesn't
* exist, and we should use the genphy driver. */
@@ -386,13 +404,12 @@ struct phy_device *phy_attach(struct net_device *dev,
err = device_bind_driver(d);
if (err)
- return ERR_PTR(err);
+ return err;
}
if (phydev->attached_dev) {
- printk(KERN_ERR "%s: %s already attached\n",
- dev->name, bus_id);
- return ERR_PTR(-EBUSY);
+ dev_err(&dev->dev, "PHY already attached\n");
+ return -EBUSY;
}
phydev->attached_dev = dev;
@@ -410,13 +427,48 @@ struct phy_device *phy_attach(struct net_device *dev,
err = phy_scan_fixups(phydev);
if (err < 0)
- return ERR_PTR(err);
+ return err;
err = phydev->drv->config_init(phydev);
if (err < 0)
- return ERR_PTR(err);
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(phy_attach_direct);
+
+/**
+ * phy_attach - attach a network device to a particular PHY device
+ * @dev: network device to attach
+ * @bus_id: Bus ID of PHY device to attach
+ * @flags: PHY device's dev_flags
+ * @interface: PHY device's interface
+ *
+ * Description: Same as phy_attach_direct() except that a PHY bus_id
+ * string is passed instead of a pointer to a struct phy_device.
+ */
+struct phy_device *phy_attach(struct net_device *dev,
+ const char *bus_id, u32 flags, phy_interface_t interface)
+{
+ struct bus_type *bus = &mdio_bus_type;
+ struct phy_device *phydev;
+ struct device *d;
+ int rc;
+
+ /* Search the list of PHY devices on the mdio bus for the
+ * PHY with the requested name */
+ d = bus_find_device_by_name(bus, NULL, bus_id);
+ if (!d) {
+ pr_err("PHY %s not found\n", bus_id);
+ return ERR_PTR(-ENODEV);
}
+ phydev = to_phy_device(d);
+
+ rc = phy_attach_direct(dev, phydev, flags, interface);
+ if (rc)
+ return ERR_PTR(rc);
return phydev;
}
diff --git a/include/linux/phy.h b/include/linux/phy.h
index a47d64f..97405f2 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -442,8 +442,13 @@ struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
int phy_device_register(struct phy_device *phy);
int phy_clear_interrupt(struct phy_device *phydev);
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
+int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
+ u32 flags, phy_interface_t interface);
struct phy_device * phy_attach(struct net_device *dev,
const char *bus_id, u32 flags, phy_interface_t interface);
+int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
+ void (*handler)(struct net_device *), u32 flags,
+ phy_interface_t interface);
struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
void (*handler)(struct net_device *), u32 flags,
phy_interface_t interface);
--
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