[PATCH 0/2] risc-v: implement DBCN based debug console

Currently we only offer an SBI based debug UART for SBI v0.1. With OpenSBI 1.3 the Debug Console Extension (DBCN) has become available. This allows us to implement a debug UART in a device independent manor.

Heinrich Schuchardt (2): risc-v: implement DBCN write byte risc-v: implement DBCN based debug console

arch/riscv/include/asm/sbi.h | 1 + arch/riscv/lib/sbi.c | 16 ++++++++++++++++ drivers/serial/Kconfig | 3 ++- drivers/serial/serial_sbi.c | 19 +++++++++++++++++++ 4 files changed, 38 insertions(+), 1 deletion(-)