// SPDX-License-Identifier: GPL-2.0 /* * RISC-V SBI based earlycon * * Copyright (C) 2018 Anup Patel <anup@brainfault.org> */ #include <linux/kernel.h> #include <linux/console.h> #include <linux/init.h> #include <linux/serial_core.h> #include <asm/sbi.h> static void sbi_putc(struct uart_port *port, unsigned char c) { sbi_console_putchar(c); } static void sbi_console_write(struct console *con, const char *s, unsigned n) { struct earlycon_device *dev = con->data; uart_console_write(&dev->port, s, n, sbi_putc); } static int __init early_sbi_setup(struct earlycon_device *device, const char *opt) { device->con->write = sbi_console_write; return 0; } EARLYCON_DECLARE(sbi, early_sbi_setup);