clocksource: exynos_mct: Add the support for ARM64
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>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 5677886..ec443c3 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -351,7 +351,7 @@
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.
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 41840d0..8f3488b 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -223,6 +223,7 @@
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 @@
"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);