Adrian Cable Posted November 15, 2020 Posted November 15, 2020 Hardware: Orange Pi Zero 512MB LTS (several different devices), bench power supply, good SD card - everything working good at all clock speeds from 480MHz upwards (all the way up to 1.4GHz even, with a heatsink). ffmpeg encode, stress-ng etc. are all fine. Specifically, the board is rock solid at 960MHz. What I want to achieve: take the U-boot for OPi Zero, and rebuild with an adjusted config to achieve a faster boot time, by replacing CONFIG_SYS_CLK_FREQ=480000000 with CONFIG_SYS_CLK_FREQ=960000000. (Does anyone know why the standard Armbian build is set to boot at such a low clock speed?) Starting point: I can successfully build U-boot from the Armbian sources (using Armbian's orangepi_zero_defconfig), write to SSD using nand-sata-install, and boot. It works fine. So there is nothing wrong with my build process, or my ability to reproduce the base configuration. What goes wrong: when I adjust CONFIG_SYS_CLK_FREQ=960000000, the board fails to boot. It freezes a few seconds into booting the kernel, with the UART output normally just stopping around here: [ OK ] Started Armbian memory supported logging. Starting Journal Service... [ OK ] Started Raise network interfaces. Occasionally I will get some kind of error: [ 6.871890] BUG: Bad page state in process sed pfn:546e2 So it appears that, in addition to adjusting the CPU frequency, I need to adjust something else to make it all work. Does anyone know what needs to be done? Thanks!
Adrian Cable Posted November 27, 2020 Author Posted November 27, 2020 Issue still persists unfortunately with Armbian 20.11, which does have an updated U-Boot (v2020.10). Still scratching my head on this, and welcome any thoughts anyone may have. Thank you!
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