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a524f0a507
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>
40 lines
858 B
C
40 lines
858 B
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Gabriel Somlo
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*
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* Authors:
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* Gabriel Somlo <gsomlo@gmail.com>
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*/
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#include <sbi/sbi_error.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/serial/fdt_serial.h>
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#include <sbi_utils/serial/litex-uart.h>
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static int serial_litex_init(const void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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uint64_t reg_addr, reg_size;
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int rc;
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if (nodeoff < 0 || !fdt)
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return SBI_ENODEV;
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rc = fdt_get_node_addr_size(fdt, nodeoff, 0, ®_addr, ®_size);
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if (rc < 0 || !reg_addr || !reg_size)
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return SBI_ENODEV;
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return litex_uart_init(reg_addr);
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}
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static const struct fdt_match serial_litex_match[] = {
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{ .compatible = "litex,liteuart" },
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{ },
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};
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const struct fdt_driver fdt_serial_litex = {
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.match_table = serial_litex_match,
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.init = serial_litex_init
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};
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