Hi,
I've noticed that the keyboard backlight was no longer working on letux-5.10.y. The LCD backlight is fine, which pointed to a problem with l4-abe in particular. The pertinent error is
[ 2.649385] omap-dmtimer-pwm dmtimer-pwm@8: Unable to find Timer pdev
which unfortunately isn't that helpful. Looking at the changes, I found this commit
ARM: dts: Configure omap4 and 5 l4_abe for genpd and drop platform data 0fd1594b3c339f17210c7ebfff102ad054cfcc7d
which seems to be the problem as after changing l4_abe back from simple-pm-bus to simple-bus; the keyboard backlight starts working again.
I did notice that pyra_defconfig was missing CONFIG_SIMPLE_PM_BUS=y but adding that to the config wasn't enough to make simple-pm-bus work so there must be something else going on as well.
Any thoughts?
David