[help] PHY driver : Unable to find a PHY (unknown ID?)

[Mylene Josserand]

Dear Thomas,


Thank you for your quick answer !


Le 04/01/2013 11:18, Thomas Petazzoni a écrit :
> Dear Mylene Josserand,
>
> Good to see some developers from Toulouse using Barebox! I'm close, in
> Colomiers.

Yes ! We are neighbour :)
Free Electrons, I know you by name. And the kernel sources on your web 
site help me a lot !

>
> On Fri, 4 Jan 2013 10:09:05 +0100, Mylene Josserand wrote:
>
>> I am using the master branch (maybe I need to checkout a tag ?). The
>> ethernet of my board is a SMSC LAN8700 and the microchip is iMX27.
>>
>> I have configured the new source of barebox to use the Phylib and MII
>> drivers. When my barebox starts, I have an error about the PHY driver :
>
> Which board are you targeting?

It is a "home-made" board with a iMX27.

>
>> The SMSC LAN8700 is here but I can not make it work !
>>
>> I have added some prints on the phy.c and the problem is in the fonction
>> "mdiobus_scan" :
>>
>> if (!edev->phydev) {
>> 	if (addr>= 0) {
>> 		dev = mdiobus_scan(bus, addr);
>> 		if (!dev) {<<  Failed here
>> 			ret = -EIO;
>> 			goto fail;
>> 		}
>>
>> Did I miss something ?
>
> Do you have a correct PHY address in the fec_platform_data structure in
> your board file?

Hum, I did not configured it myself. I used a previous configuration of 
the board which was :
"
static struct fec_platform_data fec_info = {
	.xcv_type = MII100,
	.phy_addr = 1,
};"

How can I know which address I need to put ?

Sorry for, maybe, "newbie" question but I am self-taught in kernel 
development.

>
> Best regards,
>
> Thomas

Best regards,

-- 
Mylène JOSSERAND