This is an implementation of single-character virtio-console. Part of the patch is based on barebox implementations.
To test the patch, we can build qemu_arm64_defconfig target. Enable CONFIG_VIRTIO_CONSOLE. And run qemu-system-aarch64 with -device virtio-serial-pci,id=virtio-serial0 \ -chardev file,id=charconsole0,path=/tmp/serialconsolelog \ -device virtconsole,chardev=charconsole0,id=console0 \
When in U-boot console, type "dm tree" and we should be able to see the virtio-console device.
A. Cody Schuffelen (1): virtio: add driver for virtio_console devices
drivers/virtio/Kconfig | 8 ++ drivers/virtio/Makefile | 1 + drivers/virtio/virtio-uclass.c | 1 + drivers/virtio/virtio_console.c | 158 ++++++++++++++++++++++++++++++++ include/virtio.h | 2 + 5 files changed, 170 insertions(+) create mode 100644 drivers/virtio/virtio_console.c