[U-Boot] [PATCH] mvebu: a38x: Force receiver detected on PCIe lanes

[Stefan Roese]

On 28.05.2018 16:16, Rabeeh Khoury wrote:
> 
> 
>     I understand that this might fix an issue on a specific board (ClearFog
>     in this case, correct?). But are you sure that its safe to force this
>     link detection for all A38x boards?
> 
> 
> We have tested on clearfog-pro / base and two other custom boards that 
> we have.
> On long traces this fix made it possible for the PCIe root complex to 
> start link negotiation (triggers the LTSSM state machine to negotiate 
> link with a PCIe endpoint).
> 
> I assume that this fix can be done for any PCIe root complex on Armada 38x.
>  From power consumption point of view we haven't noticed any difference 
> with and without this patch on a system with 3 PCIe root complexes that 
> doesn't have any PCIe endpoint connected to it (i.e. empty mini PCIe slots).

Thanks Rabeeh. We should probably add this explanation / test result
into the commit message. I can do this, when I apply this patch.

Thanks,
Stefan