[PATCH V2 RFC 6/6] ARM: dts: bcm2835: Add Raspberry Pi Zero

[John Youn]

On 8/16/2016 12:58 PM, Stefan Wahren wrote:
> Hi John,
> 
>> John Youn <John.Youn at synopsys.com> hat am 16. August 2016 um 21:30
>> geschrieben:
>>
>>
>> On 7/26/2016 11:54 AM, Stefan Wahren wrote:
>> ...
>>> +/*
>>> + * Settings for otg
>>> + *
>>> +	dr_mode = "otg";
>>> +	h-rx-fifo-size = <774>;
>>> +	h-np-tx-fifo-size = <32>;
>>> +	h-tx-fifo-size = <0>;
>>
>> This seems odd. It should be non-zero for use when operating as host.
>>
> 
> like in host mode i took the default values in otg mode for the last two here
> (please refer to the logs). The BCM2835 datasheet isn't very helpful.
> 
> Do you have any suggestions for valid values or how to get them?
> 

The same values used in host-only mode should work.

It seems that the reset values for host-mode aren't being read
correctly with dr_mode == otg. I suspect this is the core reset and
force-mode delay problem.

Can you try with this patch series to see if you get the proper
values?

http://marc.info/?l=linux-kernel&m=145921907525708

This series fixes known issues, but it also breaks at least one
platform and I haven't had time to look at it properly yet.

Regards,
John