From: Chanwoo Choi Date: Mon, 18 Jul 2011 06:07:14 +0000 (+0900) Subject: clocksource: convert 32-bit down counting clocksource on S5PV210/S5P64X0 X-Git-Tag: v3.1-rc1~248^2^2~19 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0665ccc4c3f229abe3eabe49f3f99763515cf0af;p=profile%2Fivi%2Fkernel-x86-ivi.git clocksource: convert 32-bit down counting clocksource on S5PV210/S5P64X0 Convert the S5PV210/S5P64X0 32-bit down-counting clocksource to the generic mmio clocksource infrastructure Signed-off-by: Chanwoo Choi Signed-off-by: Kyungmin Park Signed-off-by: Kukjin Kim --- diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 2b5f82f..d39f532 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -726,6 +726,7 @@ config ARCH_S5P64X0 select GENERIC_GPIO select HAVE_CLK select CLKDEV_LOOKUP + select CLKSRC_MMIO select HAVE_S3C2410_WATCHDOG if WATCHDOG select GENERIC_CLOCKEVENTS select HAVE_SCHED_CLOCK @@ -756,6 +757,7 @@ config ARCH_S5PV210 select GENERIC_GPIO select HAVE_CLK select CLKDEV_LOOKUP + select CLKSRC_MMIO select ARM_L1_CACHE_SHIFT_6 select ARCH_HAS_CPUFREQ select GENERIC_CLOCKEVENTS diff --git a/arch/arm/plat-s5p/s5p-time.c b/arch/arm/plat-s5p/s5p-time.c index 7c82f06..c833e7b 100644 --- a/arch/arm/plat-s5p/s5p-time.c +++ b/arch/arm/plat-s5p/s5p-time.c @@ -314,13 +314,6 @@ static void __iomem *s5p_timer_reg(void) return S3C_TIMERREG(offset); } -static cycle_t s5p_timer_read(struct clocksource *cs) -{ - void __iomem *reg = s5p_timer_reg(); - - return (cycle_t) (reg ? ~__raw_readl(reg) : 0); -} - /* * Override the global weak sched_clock symbol with this * local implementation which uses the clocksource to get some @@ -350,14 +343,6 @@ static void notrace s5p_update_sched_clock(void) update_sched_clock(&cd, ~__raw_readl(reg), (u32)~0); } -struct clocksource time_clocksource = { - .name = "s5p_clocksource_timer", - .rating = 250, - .read = s5p_timer_read, - .mask = CLOCKSOURCE_MASK(32), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - static void __init s5p_clocksource_init(void) { unsigned long pclk; @@ -375,8 +360,9 @@ static void __init s5p_clocksource_init(void) init_sched_clock(&cd, s5p_update_sched_clock, 32, clock_rate); - if (clocksource_register_hz(&time_clocksource, clock_rate)) - panic("%s: can't register clocksource\n", time_clocksource.name); + if (clocksource_mmio_init(s5p_timer_reg(), "s5p_clocksource_timer", + clock_rate, 250, 32, clocksource_mmio_readl_down)) + panic("s5p_clocksource_timer: can't register clocksource\n"); } static void __init s5p_timer_resources(void)