Hi,
I updated the mainline kernel on a custom board with an imx8mq from 6.0.19 to 6.1.1, after which I stopped getting any output on the serial console (bootloader works fine, just the kernel version changed).
Connecting via JTAG allowed me to read the kernel logs. There are some differences from the previous kernel:
[ 0.087445] platform soc@0: Fixed dependency cycle(s) with /soc@0/bus@30000000/efuse@30350000/soc-uid@4
[ 0.098045] platform 30330000.pinctrl: Fixed dependency cycle(s) with /soc@0/bus@30000000/pinctrl@30330000/pinctrl_gpiosgrp
[ 0.099852] platform 30350000.efuse: Fixed dependency cycle(s) with /soc@0/bus@30000000/clock-controller@30380000
[ 0.102895] platform 30350000.efuse: Fixed dependency cycle(s) with /soc@0/bus@30000000/clock-controller@30380000
[ 0.104614] platform 30380000.clock-controller: Fixed dependency cycle(s) with /soc@0/bus@30000000/gpc@303a0000
[ 0.106311] platform 30380000.clock-controller: Fixed dependency cycle(s) with /soc@0/bus@30000000/gpc@303a0000
[ 0.107825] platform 303a0000.gpc: Fixed dependency cycle(s) with /soc@0/interrupt-controller@38800000
Any ideas as to what might have caused the dependency cycle in the 6.1.1 kernel?
There is also this message now:
[ 14.052893] platform regulator-vdd-arm: deferred probe pending
[ 14.052911] platform clock-pcie1-refclk-gate: deferred probe pending
[ 14.052927] platform 38200000.usb: deferred probe pending
[ 14.052942] platform gpio-keys: deferred probe pending
On the old kernel, the serial console is initialised (this is missing from the log on the new kernel):
0.225009] SoC: i.MX8MQ revision 2.1
[ 0.229819] 30880000.serial: ttymxc2 at MMIO 0x30880000 (irq = 16, base_baud = 1562500) is a IMX
[ 1.030218] printk: console [ttymxc2] enabled
[ 1.035840] 30890000.serial: ttymxc1 at MMIO 0x30890000 (irq = 17, base_baud = 1562500) is a IMX
[ 1.045868] 30a60000.serial: ttymxc3 at MMIO 0x30a60000 (irq = 18, base_baud = 1562500) is a IMX
Any hints and ideas on how to solve this problem would be appreciated, thanks in advance.
