[LEDE-DEV] tests with ipq806x 4.4 kernel

[Josh Bendavid]

Hi,
I've tested the current master on Tp-link Archer C2600 1.0 with kernel 4.4.

Few things that I've seen:

1) CPU frequency scaling seems not active
(/sys/bus/cpu/devices/cpu0/cpufreq/ does not exist and wired network
performance is significantly worse than with 3.18 kernel, limited by
high sirq usage, suggesting that the cpu is stuck at a lower
clockspeed)

As being discussed in https://github.com/lede-project/source/pull/6
this is related to the missing smb208 regulator support, but still
some issues with the patch there.

2) Kernel messages like
"spi_qup 1a280000.spi: unexpected irq 00000000 00000000 00000080"
(which don't seem to have any other visible effect)

3)  The same ath10k stack traces being discussed in
https://github.com/lede-project/source/pull/6  which go away if
reverting to wireless-testing 2016-01-10

Thanks,
Josh