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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 <cw00.choi@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
hifive-unleashed-5.1
Chanwoo Choi 2011-07-18 15:07:14 +09:00 committed by Kukjin Kim
parent 65f5eaa27a
commit 0665ccc4c3
2 changed files with 5 additions and 17 deletions
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2
arch/arm/Kconfig
View File

@ -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

20
arch/arm/plat-s5p/s5p-time.c
View File

@ -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)