[U-Boot] [PATCH V3] AT91 Fix: return value of get_tbclk

[Andreas Bießmann]

Hi,

Am 01.09.2010 19:37, schrieb Jens Scharsig:
> Am 2010-09-01 09:30, schrieb Reinhard Meyer:
>>
>> at91_emac AND macb?
>>
>> macb works for AVR32AP700x and (at least) for AT91SAM9260/9G20/9XE.
>>
>> What is the deal with at91_emac? Is it required for some AT91's
>> because macb does not work there?

>> Does it provide better "results" than macb?

> I think the separation has historical reasons.
> For AT91RM and AT91SAM existed separate drivers and separate arch.
> I remeber in older datascheets the ethernet inteface also marked with
MACB.
> In my opinion, the at91_emac the latest drivers (NET_MULTI api SoC
> access via c structurs).

currently at91_emac is used for AT91RM9200 devices cause this register
footprint differs to the one of MACB used in SAM9/AVR32 devices. Both
subsystems use similar namings but some register flags have different
offsets. MACB additionally seems to have more features than EMAC (namely
WOL register, some more flags in status register, ...).

But I think it is possible to merge both drivers cause except for the
different register footprint they both seems to work the same way. I
already have some improvements for at91_emac on stack and can look for
possibilities merging both.

regards

Andreas Bießmann