From 08f26b1ef25a2f7b52afcb805d260fd5a000a7f6 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 15 Dec 2010 21:52:10 +0000 Subject: 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 --- arch/arm/Kconfig | 1 + arch/arm/plat-iop/time.c | 15 ++++++++++++--- 2 files changed, 13 insertions(+), 3 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index d5bd266..58e2fe3 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 d03a932..2db6e60 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -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; -- cgit v1.1