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    SubjectRe: [PATCH V8 12/13] ptp: Added a clock driver for the IXP46x.
    Richard Cochran <> writes:

    > But before that, I have a big favor to ask you. Can you please look at
    > the TODO in my patch and give me a hint? I don't know how to relate
    > the port instance (NPE A,B,C) to the two time stamping channels.

    I assume you mean this:
    + * PHYSICAL_ID(p->id) ?
    + * TODO - Figure out correct mapping.

    Unfortunately I can's find this information in the devel manual. I think
    there are 3 channels (not two), each for one Ethernet port. IXP465 can
    have a port on each NPE.

    PHYSICAL_ID etc. are described at the start of the file:
    * logical port 0x00 0x10 0x20
    * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
    * physical PortId 2 0 1

    This means the first port (usually "eth0") is connected to NPE-B, the
    second port to NPE-C, and the third port to NPE-A (not available on

    Also, the manual says NPE-B can serve 3 additional Ethernet ports
    (6 total).

    I only have access to IXP425 (and 421) hardware. I think someone with
    the actual IXP465 has to check the details.
    Krzysztof Halasa

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      Last update: 2011-01-10 21:27    [W:0.030 / U:24.652 seconds]
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