[U-Boot-Users] [PATCH] Add Vitesse 8601 support to TSEC driver

[Tor Krill]

Hi,

On 4/17/2008, "Andre Schwarz" <andre.schwarz at matrix-vision.de> wrote:

>Tor,
>
>after all my VSC8601 is up and running on MPC8343  :-)
>
>I'm sorry to say that I don't find this patch ok after going through the
>manuals :
>
>Register 0x17 is a very coarse setting. If the capabilities of the PHY
>should be taken into account and be configurable we should use the skew
>control in extended register 0x1c. This should be definable -
>CFG_VSC8601_SKEWFIX simply applies maximum skew ...

Sure it certainly could have been done in a more configurable way. But
you have to decide what you need. For us this was an apropriate level
atm that scratched our itch. If we where to expose every setting from
the start we still would not have been done  ;)

>After all changing the bits in register 0x17 _require_ a soft reset by
>asserting bit 15 in register 0 before they are going to work.
>
>Obviously this patch has no effect at all.
>Do you reset the PHY manually after this configuration ?

According to our datasheet (dated july 2006) only changes of bit 12 in
this register needs a software reset to take. We don't reset the phy
after changing this and the change obviously work (we have tested and
verified that it won't work without the change).

>This PHY definitely needs a proper setup function since there are quite
>interesting registers which need read-modify-write.
>
>What do you think ?

Perhaps a patch to improve what you find missing?

/Tor

>
>Kim Phillips schrieb:
>> On Mon, 31 Mar 2008 10:01:34 -0400
>> Ben Warren <biggerbadderben at gmail.com> wrote:
>>
>>
>>> Tor Krill wrote:
>>>
>>>> Add phy_info for Vitesse VSC8601.
>>>> Add config option, CFG_VSC8601_SKEWFIX, to enable RGMII skew timing compensation.
>>>>
>>>> Signed-off-by: Tor Krill <tor at excito.com>
>>>>
>>>>
>>> Acked-by: Ben Warren <biggerbadderben at gmail.com>
>>>
>>
>> I don't have a Vitesse 8601, so technically I can't ack it, but I can:
>>
>> Reviewed-by: Kim Phillips <kim.phillips at freescale.com>
>>
>> minor nit: it would be nice if the following:
>>
>>
>>>> +#ifdef CFG_VSC8601_SKEWFIX
>>>> +				{MIIM_VSC8601_EPHY_CON,MIIM_VSC8601_EPHY_CON_INIT_SKEW,NULL},
>>>> +#endif
>>>>
>>
>> were made to have spaces after commas, and flow onto a separate
>> line so as to not be a 96 char line..
>>
>> Kim
>>
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>
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