kumquat-buildroot/board/stmicroelectronics/stm32f469-disco/extlinux.conf

label stm32f469-disco-buildroot
  kernel /zImage
  devicetree /stm32f469-disco.dtb
  append console=ttySTM0,115200 root=/dev/mmcblk0p2 rw rootfstype=ext2 rootwait earlyprintk consoleblank=0 ignore_loglevel
configs/stm32f469_disco: fix kernel bootup As described by [1], the kernel generated by the configuration for the STM32f469 Discovery board is buggy. Using a newer kernel, as suggested by [1], increases the dtb and Kernel image size. In particular, the 5.12 version of the kernel generates a dtb and a kernel image whose sum exceeds the 2 MByte of the flash module. So I decided to replace the afboot-stm32 bootloader in the flash with U-boot to easily boot the system from sdcard without having to worry about the size of dtb, kernel and rootfs generated by the configuration. This solution allows you to fix the kernel boot issue and makes it possible to use its future versions. [1] http://buildroot-busybox.2317881.n4.nabble.com/Bug-11746-New-stm32f469-didn-t-work-correctly-td219644.html Signed-off-by: Dario Binacchi <dariobin@libero.it> Acked-by: Christophe Priouzeau <christophe.priouzeau@foss.st.com> Tested-by: Christophe Priouzeau <christophe.priouzeau@foss.st.com> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> [Arnout: - specify headers version explicitly, even though it's default; - bump kernel to 5.12.11] 2021-06-07 18:31:49 +02:00			`label stm32f469-disco-buildroot`
			`kernel /zImage`
			`devicetree /stm32f469-disco.dtb`
			`append console=ttySTM0,115200 root=/dev/mmcblk0p2 rw rootfstype=ext2 rootwait earlyprintk consoleblank=0 ignore_loglevel`