netdev - Re: [PATCH 05/14] phylib: add *_direct() variants of phy_connect and phy

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Date:	Sat, 18 Apr 2009 00:08:32 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Andy Fleming <afleming@...escale.com>
Cc:	netdev@...r.kernel.org, linuxppc-dev@...abs.org, olof@...om.net,
	galak@...nel.crashing.org,
	Anton Vorontsov <avorontsov@...mvista.com>,
	Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
Subject: Re: [PATCH 05/14] phylib: add *_direct() variants of phy_connect and 
	phy_attach functions

On Wed, Apr 15, 2009 at 3:10 PM, Andy Fleming <afleming@...escale.com> wrote:
>
> On Mar 31, 2009, at 3:27 AM, Grant Likely wrote:
>
>> 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>
>> ---
>> @@ -312,18 +339,21 @@ 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);
>
>
> Why not just invoke phy_attach(), here, and thereby avoid the duplicate
> search code?

Yeah, you're right.  I had done it this way for symmetry, but calling
phy_attach_direct is probably better.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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