LXR linux/drivers/tty/serial/earlycon-riscv-sbi.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * RISC-V SBI based earlycon
   4 *
   5 * Copyright (C) 2018 Anup Patel <anup@brainfault.org>
   6 */
   7#include <linux/kernel.h>
   8#include <linux/console.h>
   9#include <linux/init.h>
  10#include <linux/serial_core.h>
  11#include <asm/sbi.h>
  12
  13static void sbi_putc(struct uart_port *port, int c)
  14{
  15        sbi_console_putchar(c);
  16}
  17
  18static void sbi_console_write(struct console *con,
  19                              const char *s, unsigned n)
  20{
  21        struct earlycon_device *dev = con->data;
  22        uart_console_write(&dev->port, s, n, sbi_putc);
  23}
  24
  25static int __init early_sbi_setup(struct earlycon_device *device,
  26                                  const char *opt)
  27{
  28        device->con->write = sbi_console_write;
  29        return 0;
  30}
  31EARLYCON_DECLARE(sbi, early_sbi_setup);
  32