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SubjectRE: [patch 1/1] ppc: Possible bug fix for FCC driver
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Hi Cedric,

For ppc embedded related patches, please also cc:
linuxppc-embedded@ozlabs.org.

> We use a kernel 2.6.14 on PPC platform (MPC 8555). The FCC driver
works

To submit a kernel patch upstream, the patch should be against the
latest kernel version which is 2.6.21-rc now.
> well with a 100Mbps link. But it doesn't with a 10Mbps link. To solve
> it, I modified the GFMR register init: removed TCI bit and set CRC32
bit
> instead of.

I don't know how these bits caused the 10M link issue. Do you have any
reasoning?

> Signed-off-by: Cedric Pontois <cpontois@nortel.com>
>
>
------------------------------------------------------------------------
> -----
>
> diff -ruN pa-original/arch/ppc/8260_io/fcc_enet.c
> pa-patched/arch/ppc/8260_io/fcc_enet.c
> --- pa-original/arch/ppc/8260_io/fcc_enet.c 2007-03-02
> 14:57:07.000197000 +0100
> +++ pa-patched/arch/ppc/8260_io/fcc_enet.c 2007-03-02
> 14:57:08.000038000 +0100
> @@ -2232,7 +2232,7 @@
>
> /* Set GFMR to enable Ethernet operating mode.
> */
> - fccp->fcc_gfmr = (FCC_GFMR_TCI | FCC_GFMR_MODE_ENET);
> + fccp->fcc_gfmr = (FCC_GFMR_TCRC_32 | FCC_GFMR_MODE_ENET);
>
> /* Set sync/delimiters.
> */
>

-
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