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authorLinus Walleij <linus.walleij@stericsson.com>2010-06-02 09:08:55 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-07-22 10:37:47 +0100
commit7d63397574c874a05e071987248c44fcf13eccf1 (patch)
treead5b12199c497bbbc60633b9698571938fbf567b /arch
parentcd5b8f8755a89a57fc8c408d284b8b613f090345 (diff)
downloadop-kernel-dev-7d63397574c874a05e071987248c44fcf13eccf1.zip
op-kernel-dev-7d63397574c874a05e071987248c44fcf13eccf1.tar.gz
ARM: 6159/1: Move IOP to use common mult/shift calculation code
Since the infrastructure for determining shift/mult values from a clock rate and a minimum programmable rate is now in the kernel, lets remove this custom code. Cc: Deepak Saxena <dsaxena@plexity.net> Acked-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/plat-iop/time.c53
1 files changed, 9 insertions, 44 deletions
diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c
index 6c8a02a..85d3e55 100644
--- a/arch/arm/plat-iop/time.c
+++ b/arch/arm/plat-iop/time.c
@@ -29,6 +29,11 @@
#include <mach/time.h>
/*
+ * Minimum clocksource/clockevent timer range in seconds
+ */
+#define IOP_MIN_RANGE 4
+
+/*
* IOP clocksource (free-running timer 1).
*/
static cycle_t iop_clocksource_read(struct clocksource *unused)
@@ -44,27 +49,6 @@ static struct clocksource iop_clocksource = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static void __init iop_clocksource_set_hz(struct clocksource *cs, unsigned int hz)
-{
- u64 temp;
- u32 shift;
-
- /* Find shift and mult values for hz. */
- shift = 32;
- do {
- temp = (u64) NSEC_PER_SEC << shift;
- do_div(temp, hz);
- if ((temp >> 32) == 0)
- break;
- } while (--shift != 0);
-
- cs->shift = shift;
- cs->mult = (u32) temp;
-
- printk(KERN_INFO "clocksource: %s uses shift %u mult %#x\n",
- cs->name, cs->shift, cs->mult);
-}
-
/*
* IOP sched_clock() implementation via its clocksource.
*/
@@ -130,27 +114,6 @@ static struct clock_event_device iop_clockevent = {
.set_mode = iop_set_mode,
};
-static void __init iop_clockevent_set_hz(struct clock_event_device *ce, unsigned int hz)
-{
- u64 temp;
- u32 shift;
-
- /* Find shift and mult values for hz. */
- shift = 32;
- do {
- temp = (u64) hz << shift;
- do_div(temp, NSEC_PER_SEC);
- if ((temp >> 32) == 0)
- break;
- } while (--shift != 0);
-
- ce->shift = shift;
- ce->mult = (u32) temp;
-
- printk(KERN_INFO "clockevent: %s uses shift %u mult %#lx\n",
- ce->name, ce->shift, ce->mult);
-}
-
static irqreturn_t
iop_timer_interrupt(int irq, void *dev_id)
{
@@ -190,7 +153,8 @@ void __init iop_init_time(unsigned long tick_rate)
*/
write_tmr0(timer_ctl & ~IOP_TMR_EN);
setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq);
- iop_clockevent_set_hz(&iop_clockevent, tick_rate);
+ clockevents_calc_mult_shift(&iop_clockevent,
+ tick_rate, IOP_MIN_RANGE);
iop_clockevent.max_delta_ns =
clockevent_delta2ns(0xfffffffe, &iop_clockevent);
iop_clockevent.min_delta_ns =
@@ -207,6 +171,7 @@ void __init iop_init_time(unsigned long tick_rate)
write_trr1(0xffffffff);
write_tcr1(0xffffffff);
write_tmr1(timer_ctl);
- iop_clocksource_set_hz(&iop_clocksource, tick_rate);
+ clocksource_calc_mult_shift(&iop_clocksource, tick_rate,
+ IOP_MIN_RANGE);
clocksource_register(&iop_clocksource);
}
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