3aff0403f8
Having a clocksource_arch_init() callback always sets vdso_clock_mode to VDSO_CLOCKMODE_ARCHTIMER if GENERIC_GETTIMEOFDAY is enabled, this is required for the riscv-timer. This works for platforms where just riscv-timer clocksource is present. On platforms where other clock sources are available we want them to register with vdso_clock_mode set to VDSO_CLOCKMODE_NONE. On the Renesas RZ/Five SoC OSTM block can be used as clocksource [0], to avoid multiple clock sources being registered as VDSO_CLOCKMODE_ARCHTIMER move setting of vdso_clock_mode in the riscv-timer driver instead of doing this in clocksource_arch_init() callback as done similarly for ARM/64 architecture. [0] drivers/clocksource/renesas-ostm.c Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Tested-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Samuel Holland <samuel@sholland.org> Link: https://lore.kernel.org/r/20221229224601.103851-1-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
36 lines
808 B
C
36 lines
808 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/clockchips.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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tick_setup_hrtimer_broadcast();
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}
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