Files
opensbi/lib/utils/serial/fdt_serial_litex.c
Samuel Holland a524f0a507 lib: utils/serial: Use fdt_driver for initialization
The serial driver subsystem does not need any extra data, so it can use
`struct fdt_driver` directly. The generic fdt_serial_init() first
attempts to match the chosen stdout device, and upon failure matches the
first available serial device in the DT. It is a fatal error if no such
device is found. This matches the behavior of fdt_driver_init_one().

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-11-28 17:52:58 +05:30

40 lines
858 B
C

/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 Gabriel Somlo
*
* Authors:
* Gabriel Somlo <gsomlo@gmail.com>
*/
#include <sbi/sbi_error.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/serial/fdt_serial.h>
#include <sbi_utils/serial/litex-uart.h>
static int serial_litex_init(const void *fdt, int nodeoff,
const struct fdt_match *match)
{
uint64_t reg_addr, reg_size;
int rc;
if (nodeoff < 0 || !fdt)
return SBI_ENODEV;
rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &reg_addr, &reg_size);
if (rc < 0 || !reg_addr || !reg_size)
return SBI_ENODEV;
return litex_uart_init(reg_addr);
}
static const struct fdt_match serial_litex_match[] = {
{ .compatible = "litex,liteuart" },
{ },
};
const struct fdt_driver fdt_serial_litex = {
.match_table = serial_litex_match,
.init = serial_litex_init
};