[PATCH 2/2] PowerPC: Fix Sequoia MAL0 and EMAC dts entries.
vbarshak at ru.mvista.com
Fri Sep 21 04:46:18 EST 2007
Valentine Barshak wrote:
> David Gibson wrote:
>> On Tue, Sep 18, 2007 at 09:29:13PM +0400, Valentine Barshak wrote:
>>> According to PowerPC 440EPx documentation,
>>> MAL0 is comprised of four channels (two transmit and two receive).
>>> Each channel is dedicated to one of two EMAC cores.
>>> This patch fixes Sequoia DTS MAL0 entry and EMAC entries,
>>> assigning correct channel numbers to EMACs.
>> Hrm.. did they change the EMAC in 440EPx to only use one MAL
>> tx-channel? All the older ones could use two (for no readily apparent
>> reason, IMO).
> Yes, they did.
> Just 1 tx and 1 rx-channel per EMAC. Just 2 bits to select channels,
> while all other bits in MAL registers are reserved.
> I'm not sure why they did it (possible bus bandwidth problems), but it's
> impossible to set more than 1 rx/tx channel for each EMAC in 440EPx.
Josh, David, is this patch OK?
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