Am Mittwoch, 17. Oktober 2018, 11:18:30 CET schrieb Daniel Lezcano: > When the performance governor is set as default, the rock960 hangs > around one minute after booting, whatever the activity is (idle, key > pressed, loaded, ...). > > Based on the commit log found at https://patchwork.kernel.org/patch/10092377/ > > "vdd_log has no consumer and therefore will not be set to a specific > voltage. Still the PWM output pin gets configured and thence the vdd_log > output voltage will changed from it's default. Depending on the idle > state of the PWM this will slightly over or undervoltage the logic supply > of the RK3399 and cause instability with GbE (undervoltage) and PCIe > (overvoltage). Since the default value set by a voltage divider is the > correct supply voltage and we don't need to change it during runtime we > remove the rail from the devicetree completely so the PWM pin will not > be configured." > > After removing the vdd-log from the rock960's specific DT, the board > does no longer hang and shows a stable behavior. > > Apply the same change for the rock960 by removing the vdd-log from the > DT. > > Fixes: 874846f1fccd ("arm64: dts: rockchip: add 96boards RK3399 Ficus board") > Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> applied as fix for 4.20 after including a stable-tag (board entered in previous kernel version) and modified subject line a bit. Thanks Heiko
