forked from Mirrors/opensbi
9190ad12f7
Linux kernel commit a2770b57d083 ("dt-bindings: timer: Add CLINT bindings")
adds the official DT bindings for CLINT, which uses "sifive,clint0"
as the compatible string. "riscv,clint0" is now legacy and has to
be kept for backward compatibility of legacy systems.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.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/timer/fdt_timer.h>
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#include <sbi_utils/sys/clint.h>
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#define CLINT_TIMER_MAX_NR 16
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static unsigned long clint_timer_count = 0;
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static struct clint_data clint_timer[CLINT_TIMER_MAX_NR];
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static int timer_clint_cold_init(void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int rc;
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struct clint_data *ct, *ctmaster = NULL;
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if (CLINT_TIMER_MAX_NR <= clint_timer_count)
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return SBI_ENOSPC;
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ct = &clint_timer[clint_timer_count++];
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if (1 < clint_timer_count)
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ctmaster = &clint_timer[0];
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rc = fdt_parse_clint_node(fdt, nodeoff, TRUE, ct);
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if (rc)
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return rc;
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return clint_cold_timer_init(ct, ctmaster);
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}
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static const struct fdt_match timer_clint_match[] = {
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{ .compatible = "riscv,clint0" },
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{ .compatible = "sifive,clint0" },
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{ },
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};
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struct fdt_timer fdt_timer_clint = {
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.match_table = timer_clint_match,
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.cold_init = timer_clint_cold_init,
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.warm_init = clint_warm_timer_init,
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.exit = NULL,
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.value = clint_timer_value,
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.event_stop = clint_timer_event_stop,
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.event_start = clint_timer_event_start,
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};
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