Hi On 9/21/21 10:00 AM, Tony Lindgren wrote: > * Jarkko Nikula <jarkko.nikula@xxxxxxxxxx> [210920 16:35]: >> On 9/20/21 4:34 PM, Tony Lindgren wrote: >>> The patch below should take us back to the earlier configuration, >>> can you please give it a try? >>> >> I double checked and unfortunate it doesn't boot at all or give any >> output when patch is applied: > > Hmm I tested it with copying the beagle timer configuration to omap3.dtsi > and things worked for me. If you can, please try adding > CONFIG_SERIAL_EARLYCON=y and then also add "debug earlyprintk" to kernel > command line. It might show something that I'm not able to reproduce. > Maybe there is a bootloader dependency or something like that. > As discussed offline recently I triple checked your first patch in this thread on top of v5.15-rc6 and using omap2plus_defconfig (has CONFIG_SERIAL_EARLYCON=y) and still I'm not able to get any output with earlyprintk. My kernel command line included "console=ttyO2,115200n8 debug earlyprintk=ttyO2,115200n8". Plain v5.15-rc6 boots. Could it be possible the "secure_32k_fck" clock has some system hanging issue on my beagle? How I understand from e428e250fde6 ("ARM: dts: Configure system timers for omap3") that "secure_32k_fck" is not referenced explicitly but your patch here does. Jarkko