Supporting C45 PHY without ID registers

Supporting C45 PHY without ID registers

[Moritz Fischer]

Hi all,

I have a 10GigE PHY that I'm working with that has most of it's
functionality availabile via MDIO
in a clause 45 compliant fashion, however the usual probe method fails
since the id registers
are not implemented.

I hacked up drivers/of/of_mdio.c to include something similar to of_get_phy_id()
for c45 phys but I was wondering if someone else has a better idea
than this in my dt:

ethernet_phy1: ethernet-phy@4 {
    compatible = "ethernet-phy-id0000.0000",
                        "ethernet-phy-id4242.4242",
                        "ethernet-phy-id0000.0000",
                        "ethernet-phy-id4343.4343",
                        "ethernet-phy-ieee802.3-c45";
    reg = <4>;
};

Where I made up 42424242 and 43434343 as ids for my PCS / PMA. Ideas?

Cheers,

Moritz

Re: Supporting C45 PHY without ID registers

[Andrew Lunn]

On Mon, Jun 27, 2016 at 04:36:20PM -0700, Moritz Fischer wrote:
> Hi all,
> 
> I have a 10GigE PHY that I'm working with that has most of it's
> functionality availabile via MDIO
> in a clause 45 compliant fashion, however the usual probe method fails
> since the id registers
> are not implemented.

Hi Moritz

Does it have any ID registers at all?

     Andrew

Re: Supporting C45 PHY without ID registers

[Moritz Fischer]

Hi Andrew,

On Mon, Jun 27, 2016 at 5:56 PM, Andrew Lunn <andrew@lunn.ch> wrote:

> Does it have any ID registers at all?

There is a vendor specific (to my knowledge) register at device 1
register 65535 ([1]) that could be read back. I haven't seen anyone
else do that.

Thanks,

Moritz

[1] http://www.xilinx.com/support/documentation/ip_documentation/ten_gig_eth_pcs_pma/v6_0/pg068-ten-gig-eth-pcs-pma.pdf