On Mon, Mar 29, 2021 at 6:37 PM Andreas Schwab <sch...@linux-m68k.org> wrote: > > On Mär 29 2021, Zong Li wrote: > > > Yes, I could get the network problem by using the defconfig you > > provided, the system hung up when executing 'ifconfig' immediately > > after installing macb driver module, the network can work by only > > reverting the commit 732374a0b440d9a79c8412f318a25cd37ba6f4e2. But the > > network is fine by using the mainline's defconfig, this is a little > > bit weird, I will check that and try to find the difference. > > My guess would be that it is an init dependency problem between the phy > driver and the clock driver, which causes the clock to be enabled too > late. >
I found that the gemgxlpll was disabled immediately by power management after macb driver install. The mainline's defconfig doesn't enable CONFIG_PM, so the network is fine on it. The opensuse defconfig enables CONFIG_PM, and the patch 732374a0b440d9a79c8412f318a25cd37ba6f4e2 added the enable/disable callback functions, so the gemgxlpll PLL, I have no idea why power management disable it, I would keep trace it. By the way, I tried to disable CONFIG_PM on oenpsuse defconfig, the system didn't hang anymore, on the contrary, I enable CONFIG_PM on mainline's defconfig, I expect that the system would hang up as well, unfortunately, I cannot boot successfully by just enabling CONFIG_PM easily. > Andreas. > > -- > Andreas Schwab, sch...@linux-m68k.org > GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 > "And now for something completely different."
