Could some full time kernel head tell me: how does a #kworker get towards to the busy end of top in state Idle? If its Idle why does it have >0.1% CPU ? My CPUs are recent enough & desktop power

#linuxkernel
uname == "Linux hiss 5.19.0-43-generic #44~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC"

https://forum.armbian.com/topic/7575-k-worker-problem-on-a20-based-boards/page/2/# #ArmBian : Using top, I observed some #kworker #cpu load on @olimex #OLinuXino #A20Micro caused by #Sunxi #IIO module : sudo rmmod sun4i_gpadc sun4i_gpadc_iio will make top stable #Linux 5.10.21-sunxi