[meta-xilinx] [meta-xilinx-community][PATCH 1/7] microzed-zynq7: Update machine configuration

[Mike Looijmans]

On 11/12/2014 06:47 AM, Nathan Rossi wrote:
>> 

Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


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-----Original Message-----
>> From: David Andrey [mailto:David.Andrey at netmodule.com]
>> Sent: Tuesday, November 11, 2014 4:57 PM
>> To: Nathan Rossi; meta-xilinx at lists.yoctoproject.org
>>
>>> * disable-net-cadence.cfg - macb should be used by default as it is
>>>    mainline, alternatively the KERNEL_FEATURES variable can be used to
>>>    override (from local.conf or elsewhere) the use of the macb driver
>>>    with the "features/xilinx/disable-macb.scc" config fragment
>>
>> Use of the xilinx driver seems more appropriate to me, at least for
>> throughput. As you anyway use the Xilinx patched kernel, why do you
>> rely on the cadence driver ?
>
> The Xilinx driver is not mainline, which means disabling the MACB driver for all kernels essentially breaks linux-yocto kernels for this board. Is the only reason for your preference of the emacps driver its throughput?
>
> To make it default for the microzed, disabling MACB for linux-xlnx kernels with something similar to below could be done to this patch.
>
> KERNEL_FEATURES_pn-linux-xlnx += "features/xilinx/disable-macb.scc"
>

Also, the Xilinx driver is needed when you route the network through EMIO and 
use a GMII-to-RGMII block in logic. Though the driver could be adjusted to use 
the regular clock drivers to switch frequencies instead of using a ghost PHY 
to do that.

Mike.