ARM: ETH PHY Micrel: KSZ8051MNL Driver?

ARM: ETH PHY Micrel: KSZ8051MNL Driver?

[Shmuel Yitzhaki]

Hi Everyone,
?
Do you know if this newer chip is compatible?with older Micrel devices (supported at mainline)?
Did anyone try using it? results?
?
Please advise,
Shmuel Yitzhaki
?
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ARM: ETH PHY Micrel: KSZ8051MNL Driver?

[Peter Korsgaard]

>>>>> "Shmuel" == Shmuel Yitzhaki <shmuelyi@yahoo.com> writes:

 Shmuel> Hi Everyone,
 Shmuel> Do you know if this newer chip is compatible with older Micrel devices
 Shmuel> (supported at mainline)?
 Shmuel> Did anyone try using it? results?

I'm using it with the generic genphy driver without any problems. I
haven't tried the micrel driver, but as the board doesn't have the
interrupt connected it wouldn't really buy me anything.

I can give the micrel driver a try if you want though.

-- 
Bye, Peter Korsgaard

ARM: ETH PHY Micrel: KSZ8051MNL Driver?

[Baruch Siach]

Hi Peter, Shmuel,

On Wed, May 23, 2012 at 10:14:44PM +0200, Peter Korsgaard wrote:
> >>>>> "Shmuel" == Shmuel Yitzhaki <shmuelyi@yahoo.com> writes:
> 
>  Shmuel> Hi Everyone,
>  Shmuel> Do you know if this newer chip is compatible with older Micrel devices
>  Shmuel> (supported at mainline)?
>  Shmuel> Did anyone try using it? results?
> 
> I'm using it with the generic genphy driver without any problems. I
> haven't tried the micrel driver, but as the board doesn't have the
> interrupt connected it wouldn't really buy me anything.
> 
> I can give the micrel driver a try if you want though.

In one project that were using the KSZ8051MNL PHY, we needed the micrel phy 
driver to set 50MHz RMII clock. This PHY defaults to 25MHz MII, and there is 
no way to change that with pull-up resistors. See commit d606ef3f (phy/micrel: 
add ability to support 50MHz RMII clock on KZS8051RNL).

baruch

-- 
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ARM: ETH PHY Micrel: KSZ8051MNL Driver?

[Peter Korsgaard]

>>>>> "Baruch" == Baruch Siach <baruch@tkos.co.il> writes:

Hi,

 >> I can give the micrel driver a try if you want though.

 Baruch> In one project that were using the KSZ8051MNL PHY, we needed
 Baruch> the micrel phy driver to set 50MHz RMII clock. This PHY
 Baruch> defaults to 25MHz MII, and there is no way to change that with
 Baruch> pull-up resistors. See commit d606ef3f (phy/micrel: add ability
 Baruch> to support 50MHz RMII clock on KZS8051RNL).

Yes, that's indeed quite unfortunate. For this project I write the phy
register in the bootloader as we need it there anyway, but for another
(am335x based) project it means we cannot used the ROM support for
network boot.

Is 50MHz is needed, the 8021/8031 are probably a better choice.

-- 
Bye, Peter Korsgaard