From mboxrd@z Thu Jan 1 00:00:00 1970 From: cw00.choi@samsung.com (Chanwoo Choi) Date: Tue, 12 Jul 2011 14:51:11 +0900 Subject: [PATCH] clocksource: convert S5PV210 32-bit down counting clocksource Message-ID: <4E1BE0CF.7060207@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Convert the S5PV210 32-bit down-counting clocksource to the generic mmio clocksource infrastructure Signed-off-by: Chanwoo Choi Signed-off-by: Kyungmin Park --- arch/arm/Kconfig | 1 + arch/arm/plat-s5p/s5p-time.c | 20 +++----------------- 2 files changed, 4 insertions(+), 17 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 9adc278..d7cd6f9 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -749,6 +749,7 @@ config ARCH_S5PV210 bool "Samsung S5PV210/S5PC110" select CPU_V7 select ARCH_SPARSEMEM_ENABLE + select CLKSRC_MMIO select GENERIC_GPIO select HAVE_CLK select ARM_L1_CACHE_SHIFT_6 diff --git a/arch/arm/plat-s5p/s5p-time.c b/arch/arm/plat-s5p/s5p-time.c index 612934c..5666f55 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) -- 1.7.0.4