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clocksource: exynos_mct: Add the support for ARM64

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This patch allows building and compile-testing the driver also for
ARM64.  The delay_timer is only supported on ARMv7.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[k.kozlowski: Adjusted commit msg]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
This commit is contained in:
Chanwoo Choi 2016-08-24 22:49:05 +09:00 committed by Krzysztof Kozlowski
parent 29b4817d40
commit f1a4c1f333
2 changed files with 5 additions and 1 deletions
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2
drivers/clocksource/Kconfig
View file

@ -351,7 +351,7 @@ config CLKSRC_METAG_GENERIC
config CLKSRC_EXYNOS_MCT
bool "Exynos multi core timer driver" if COMPILE_TEST
depends on ARM
depends on ARM || ARM64
help
Support for Multi Core Timer controller on Exynos SoCs.

4
drivers/clocksource/exynos_mct.c
View file

@ -223,6 +223,7 @@ static u64 notrace exynos4_read_sched_clock(void)
return exynos4_read_count_32();
}
#if defined(CONFIG_ARM)
static struct delay_timer exynos4_delay_timer;
static cycles_t exynos4_read_current_timer(void)
@ -231,14 +232,17 @@ static cycles_t exynos4_read_current_timer(void)
"cycles_t needs to move to 32-bit for ARM64 usage");
return exynos4_read_count_32();
}
#endif
static int __init exynos4_clocksource_init(void)
{
exynos4_mct_frc_start();
#if defined(CONFIG_ARM)
exynos4_delay_timer.read_current_timer = &exynos4_read_current_timer;
exynos4_delay_timer.freq = clk_rate;
register_current_timer_delay(&exynos4_delay_timer);
#endif
if (clocksource_register_hz(&mct_frc, clk_rate))
panic("%s: can't register clocksource\n", mct_frc.name);