Re: [PATCH 1/2] of_mdio: add new DT property 'link' for fixed-link
flat view
From: Stas Sergeev <hidden>
Date: 2015-07-10 11:20:43
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10.07.2015 11:46, Sebastien Rannou пишет:
On Fri, 10 Jul 2015, Stas Sergeev wrote:quoted
10.07.2015 00:15, Florian Fainelli пишет:quoted
Then, if the in-band status indication is not reliable (which really should be completely understood),Agree! But this is not something I can help with. Sebastien Rannou reports the problem, please ask him whatever you see fits to get a better understanding of a problem. The fact that his HW does not generate the inband status, is _my own guess_.Yes, I confirm that my HW does not generate an in-band status. AFAIK, it's a PHY that aggregates 4xSGMIIs to 1xQSGMII ; the MAC side of the PHY (with inband status) is connected to the switch through QSGMII, and in this context we are on the media side of the PHY.
Hmm, interesting. So if I parse the above correctly, you have something like 88E1340S set up into a mode when SGMII is used as media interface and QSGMII as system interface (terms are from datasheet page 5), then you connect the media interface to armada-xp and system interface to the switch. I wonder if it is the right thing to do. AFAIK you could as well set up armada-xp into QSGMII mode and connect that to switch. The driver would then disable the use of inband status and everything would be fine. Either way, your use-case proves that only DT can decide the use of an inband status. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html