42 lines
941 B
C
42 lines
941 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012 Regents of the University of California
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* Copyright (C) 2017 SiFive
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*/
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#include <linux/of_clk.h>
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#include <linux/clocksource.h>
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#include <linux/delay.h>
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#include <asm/sbi.h>
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#include <asm/processor.h>
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#include <asm/timex.h>
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unsigned long riscv_timebase __ro_after_init;
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EXPORT_SYMBOL_GPL(riscv_timebase);
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void __init time_init(void)
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{
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struct device_node *cpu;
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u32 prop;
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cpu = of_find_node_by_path("/cpus");
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if (!cpu || of_property_read_u32(cpu, "timebase-frequency", &prop))
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panic(KERN_WARNING "RISC-V system with no 'timebase-frequency' in DTS\n");
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of_node_put(cpu);
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riscv_timebase = prop;
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lpj_fine = riscv_timebase / HZ;
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of_clk_init(NULL);
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timer_probe();
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}
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void clocksource_arch_init(struct clocksource *cs)
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{
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#ifdef CONFIG_GENERIC_GETTIMEOFDAY
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cs->vdso_clock_mode = VDSO_CLOCKMODE_ARCHTIMER;
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#else
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cs->vdso_clock_mode = VDSO_CLOCKMODE_NONE;
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#endif
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}
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