[PATCH 1/7] clocksource: exynos_mct: Add the support for Exynos 64bit SoC
From: Chanwoo Choi <cw00.choi@samsung.com>
Date: 2016-08-16 06:27:53
Also in:
linux-arm-kernel, linux-samsung-soc, lkml
Subsystem:
clocksource, clockevent drivers, the rest · Maintainers:
Daniel Lezcano, Thomas Gleixner, Linus Torvalds
This patch adds the support for Exynos 64bit SoC. The delay_timer is only used for 32bit SoC. Cc: Daniel Lezcano <redacted> Cc: Thomas Gleixner <redacted> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <redacted> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> --- drivers/clocksource/Kconfig | 2 +- drivers/clocksource/exynos_mct.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 567788664723..ec443c318c77 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig@@ -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.
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 41840d02c331..8f3488b80896 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c@@ -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);
--
1.9.1