Hi Andrew, On Wed, Dec 09, 2020 at 03:44:13PM +0100, Andrew Lunn wrote: > On Wed, Dec 09, 2020 at 11:29:59AM +0100, Uwe Kleine-König wrote: > Do you have > > ommit 1e6114f51f9d4090390fcec2f5d67d8cc8dc4bfc > Author: Greg Ungerer <g...@linux-m68k.org> > Date: Wed Oct 28 15:22:32 2020 +1000 > > net: fec: fix MDIO probing for some FEC hardware blocks > > Some (apparently older) versions of the FEC hardware block do not like > the MMFR register being cleared to avoid generation of MII events at > initialization time. The action of clearing this register results in no > future MII events being generated at all on the problem block. This means > the probing of the MDIO bus will find no PHYs. > > Create a quirk that can be checked at the FECs MII init time so that > the right thing is done. The quirk is set as appropriate for the FEC > hardware blocks that are known to need this. > > in your tree?
Unless I did something wrong I also saw the failure with v5.10-rc$latest earlier today. ... some time later ... Argh, I checked my git reflog and the newest release I tested was 5.9-rc8. I wonder if my patch is a simpler and more straight forward fix for the problem however, but that might also be because I don't understand the comment touched by 1e6114f51f9d4090390fcec2f5d67d8cc8dc4bfc without checking the reference manual (which I didn't). @Marian: As it's you who has to work on this i.MX25 machine, can you maybe test if using a kernel > 5.10-rc3 (or cherry-picking 1e6114f51f9d4090390fcec2f5d67d8cc8dc4bfc) fixes the problem for you? Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ |
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