diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-15 21:52:10 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-22 22:44:47 +0000 |
| commit | 08f26b1ef25a2f7b52afcb805d260fd5a000a7f6 (patch) | |
| tree | 1eedbff4c0653868179dd3b7561a1c27df680646 | |
| parent | 5c21b7ca2c1cca3758a1d357dd57987c96ad1aa0 (diff) | |
ARM: iop: convert sched_clock() to use new infrastructure
Convert iop platforms to use the new sched_clock() infrastructure for
extending 32bit counters to full 64-bit nanoseconds.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/plat-iop/time.c | 15 |
2 files changed, 13 insertions, 3 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index d5bd266ee565..58e2fe30715b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -992,6 +992,7 @@ config ARCH_ACORN config PLAT_IOP bool select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK config PLAT_ORION bool diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c index d03a93295e60..2db6e60d149d 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -24,6 +24,7 @@ #include <linux/clockchips.h> #include <mach/hardware.h> #include <asm/irq.h> +#include <asm/sched_clock.h> #include <asm/uaccess.h> #include <asm/mach/irq.h> #include <asm/mach/time.h> @@ -50,15 +51,21 @@ static struct clocksource iop_clocksource = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static DEFINE_CLOCK_DATA(cd); + /* * IOP sched_clock() implementation via its clocksource. */ unsigned long long notrace sched_clock(void) { - cycle_t cyc = iop_clocksource_read(NULL); - struct clocksource *cs = &iop_clocksource; + u32 cyc = 0xffffffffu - read_tcr1(); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} - return clocksource_cyc2ns(cyc, cs->mult, cs->shift); +static void notrace iop_update_sched_clock(void) +{ + u32 cyc = 0xffffffffu - read_tcr1(); + update_sched_clock(&cd, cyc, (u32)~0); } /* @@ -144,6 +151,8 @@ void __init iop_init_time(unsigned long tick_rate) { u32 timer_ctl; + init_sched_clock(&cd, iop_update_sched_clock, 32, tick_rate); + ticks_per_jiffy = DIV_ROUND_CLOSEST(tick_rate, HZ); iop_tick_rate = tick_rate; |