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clocksource/drivers/riscv: Get rid of clocksource_arch_init() callback

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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>
This commit is contained in:
Lad Prabhakar 2022-12-29 22:46:01 +00:00 committed by Daniel Lezcano
parent c3daa4754f
commit 3aff0403f8
3 changed files with 5 additions and 10 deletions
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1
arch/riscv/Kconfig
View File

@ -12,7 +12,6 @@ config 32BIT
config RISCV
def_bool y
select ARCH_CLOCKSOURCE_INIT
select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
select ARCH_HAS_BINFMT_FLAT

9
arch/riscv/kernel/time.c
View File

@ -33,12 +33,3 @@ void __init time_init(void)
tick_setup_hrtimer_broadcast();
}
void clocksource_arch_init(struct clocksource *cs)
{
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
cs->vdso_clock_mode = VDSO_CLOCKMODE_ARCHTIMER;
#else
cs->vdso_clock_mode = VDSO_CLOCKMODE_NONE;
#endif
}

5
drivers/clocksource/timer-riscv.c
View File

@ -78,6 +78,11 @@ static struct clocksource riscv_clocksource = {
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
.read = riscv_clocksource_rdtime,
#if IS_ENABLED(CONFIG_GENERIC_GETTIMEOFDAY)
.vdso_clock_mode = VDSO_CLOCKMODE_ARCHTIMER,
#else
.vdso_clock_mode = VDSO_CLOCKMODE_NONE,
#endif
};
static int riscv_timer_starting_cpu(unsigned int cpu)