On Thu, 30 May 2024 at 12:11, Andrea della Porta <andrea.porta@xxxxxxxx> wrote: > > Hi, > > This patchset adds minimal support for the Broadcom BCM2712 SoC and for > the on-board SDHCI controller on Broadcom BCM2712 in order to make it > possible to boot (particularly) a Raspberry Pi 5 from SD card and get a > console through uart. > Changes to arm64/defconfig are not needed since the actual options work > as they are. > This work is heavily based on downstream contributions. > > Tested on Tumbleweed substituting the stock kernel with upstream one, > either chainloading uboot+grub+kernel or directly booting the kernel > from 1st stage bootloader. Steps to reproduce: > - prepare an SD card from a Raspberry enabled raw image, mount the first > FAT partition. > - make sure the FAT partition is big enough to contain the kernel, > anything bigger than 64Mb is usually enough, depending on your kernel > config options. > - build the kernel and dtbs making sure that the support for your root > fs type is compiled as builtin. > - copy the kernel image in your FAT partition overwriting the older one > (e.g. kernel*.img for Raspberry Pi OS or u-boot.bin for Tumbleweed). > - copy arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dtb on FAT partition. > - make sure you have a cmdline.txt file in FAT partition with the > following content: > # cat /boot/efi/cmdline.txt > root=/dev/mmcblk0p3 rootwait rw console=tty ignore_loglevel earlycon > console=ttyAMA10,115200 > - if you experience random SD issues during boot, try to set > initial_turbo=0 in config.txt. > > > Changes in V5: > > DTS: > - axi node merged into soc node > - redefined the mapping ranges of the soc node to have proper translation, > and a narrower address and size cell number for child nodes.Child nodes > reg properties adjusted accordingly > - augemented the comment in 'gio_aon' node > > sdhci-brcmstb.c: > - removed unused 'base_clk_mhz' variable Patch 1 ->3 from v5 applied for next, thanks! [...] Kind regards Uffe
