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Message-ID: <fa686aa40903182205n2f5903a4p61f0a795bd015728@mail.gmail.com>
Date: Wed, 18 Mar 2009 23:05:46 -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: Re: [PATCH 2/9] phylib: rework to prepare for OF registration of PHYs
RFC, please don't apply yet.
On Wed, Mar 18, 2009 at 11:00 PM, Grant Likely
<grant.likely@...retlab.ca> wrote:
> From: Grant Likely <grant.likely@...retlab.ca>
>
> This patch makes changes in preparation for supporting open firmware
> device tree descriptions of MDIO busses. Changes include:
> - Cleanup handling of phy_map[] entries; they are already NULLed when
> registering and so don't need to be re-cleared, and it is good practice
> to clear them out when unregistering.
> - Split phy_device registration out into a new function so that the
> OF helpers can do two stage registration (separate allocation and
> registration steps).
>
> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
> CC: linuxppc-dev@...abs.org
> CC: netdev@...r.kernel.org
> CC: Andy Fleming <afleming@...escale.com>
> ---
>
> drivers/net/phy/mdio_bus.c | 29 +++-------------------------
> drivers/net/phy/phy_device.c | 43 ++++++++++++++++++++++++++++++++++++++----
> include/linux/phy.h | 1 +
> 3 files changed, 43 insertions(+), 30 deletions(-)
>
>
> diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
> index 811a637..3c39c7b 100644
> --- a/drivers/net/phy/mdio_bus.c
> +++ b/drivers/net/phy/mdio_bus.c
> @@ -112,7 +112,6 @@ int mdiobus_register(struct mii_bus *bus)
> bus->reset(bus);
>
> for (i = 0; i < PHY_MAX_ADDR; i++) {
> - bus->phy_map[i] = NULL;
> if ((bus->phy_mask & (1 << i)) == 0) {
> struct phy_device *phydev;
>
> @@ -149,6 +148,7 @@ void mdiobus_unregister(struct mii_bus *bus)
> for (i = 0; i < PHY_MAX_ADDR; i++) {
> if (bus->phy_map[i])
> device_unregister(&bus->phy_map[i]->dev);
> + bus->phy_map[i] = NULL;
> }
> }
> EXPORT_SYMBOL(mdiobus_unregister);
> @@ -187,35 +187,12 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
> if (IS_ERR(phydev) || phydev == NULL)
> return phydev;
>
> - /* There's a PHY at this address
> - * We need to set:
> - * 1) IRQ
> - * 2) bus_id
> - * 3) parent
> - * 4) bus
> - * 5) mii_bus
> - * And, we need to register it */
> -
> - phydev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
> -
> - phydev->dev.parent = bus->parent;
> - phydev->dev.bus = &mdio_bus_type;
> - dev_set_name(&phydev->dev, PHY_ID_FMT, bus->id, addr);
> -
> - phydev->bus = bus;
> -
> - /* Run all of the fixups for this PHY */
> - phy_scan_fixups(phydev);
> -
> - err = device_register(&phydev->dev);
> + err = phy_device_register(phydev);
> if (err) {
> - printk(KERN_ERR "phy %d failed to register\n", addr);
> phy_device_free(phydev);
> - phydev = NULL;
> + return NULL;
> }
>
> - bus->phy_map[addr] = phydev;
> -
> return phydev;
> }
> EXPORT_SYMBOL(mdiobus_scan);
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 0a06e4f..793332f 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -39,10 +39,6 @@ MODULE_DESCRIPTION("PHY library");
> MODULE_AUTHOR("Andy Fleming");
> MODULE_LICENSE("GPL");
>
> -static struct phy_driver genphy_driver;
> -extern int mdio_bus_init(void);
> -extern void mdio_bus_exit(void);
> -
> void phy_device_free(struct phy_device *phydev)
> {
> kfree(phydev);
> @@ -53,6 +49,10 @@ static void phy_device_release(struct device *dev)
> phy_device_free(to_phy_device(dev));
> }
>
> +static struct phy_driver genphy_driver;
> +extern int mdio_bus_init(void);
> +extern void mdio_bus_exit(void);
> +
> static LIST_HEAD(phy_fixup_list);
> static DEFINE_MUTEX(phy_fixup_lock);
>
> @@ -166,6 +166,10 @@ struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id)
> dev->addr = addr;
> dev->phy_id = phy_id;
> dev->bus = bus;
> + dev->dev.parent = bus->parent;
> + dev->dev.bus = &mdio_bus_type;
> + dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
> + dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr);
>
> dev->state = PHY_DOWN;
>
> @@ -237,6 +241,37 @@ struct phy_device * get_phy_device(struct mii_bus *bus, int addr)
> }
>
> /**
> + * phy_device_register - Register the phy device on the MDIO bus
> + * @phy_device: phy_device structure to be added to the MDIO bus
> + */
> +int phy_device_register(struct phy_device *phydev)
> +{
> + int err;
> +
> + /* Don't register a phy if one is already registered at this
> + * address */
> + if (phydev->bus->phy_map[phydev->addr])
> + return -EINVAL;
> + phydev->bus->phy_map[phydev->addr] = phydev;
> +
> + /* Run all of the fixups for this PHY */
> + phy_scan_fixups(phydev);
> +
> + err = device_register(&phydev->dev);
> + if (err) {
> + pr_err("phy %d failed to register\n", phydev->addr);
> + goto out;
> + }
> +
> + return 0;
> +
> + out:
> + phydev->bus->phy_map[phydev->addr] = NULL;
> + return err;
> +}
> +EXPORT_SYMBOL(phy_device_register);
> +
> +/**
> * phy_prepare_link - prepares the PHY layer to monitor link status
> * @phydev: target phy_device struct
> * @handler: callback function for link status change notifications
> diff --git a/include/linux/phy.h b/include/linux/phy.h
> index d7e54d9..a47d64f 100644
> --- a/include/linux/phy.h
> +++ b/include/linux/phy.h
> @@ -439,6 +439,7 @@ static inline int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
>
> int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id);
> 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);
> struct phy_device * phy_attach(struct net_device *dev,
>
>
--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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