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authorLinus Walleij <linus.walleij@linaro.org>2012-01-11 09:57:56 +0100
committerLinus Walleij <linus.walleij@linaro.org>2012-01-31 00:18:26 +0100
commita3b86a6d6f5a7592192eb3fca22ae38de18f2171 (patch)
treea2256430a83e7c1f0b48f44fe4ec7167dbefb78a /arch/arm/plat-nomadik
parentd3e8b7569ad733c063a95dc1a51928e6e7c40652 (diff)
ARM: plat-nomadik: modernize MTU timer
Modernize the MTU timer to rely on the clockevents core to calculate mult and shift and setup the clock event. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/plat-nomadik')
-rw-r--r--arch/arm/plat-nomadik/timer.c23
1 files changed, 3 insertions, 20 deletions
diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c
index 954a862ec4a..9222e5522a4 100644
--- a/arch/arm/plat-nomadik/timer.c
+++ b/arch/arm/plat-nomadik/timer.c
@@ -21,12 +21,6 @@
#include <asm/sched_clock.h>
/*
- * Guaranteed runtime conversion range in seconds for
- * the clocksource and clockevent.
- */
-#define MTU_MIN_RANGE 4
-
-/*
* The MTU device hosts four different counters, with 4 set of
* registers. These are register names.
*/
@@ -102,7 +96,6 @@ static int nmdk_clkevt_next(unsigned long evt, struct clock_event_device *ev)
void nmdk_clkevt_reset(void)
{
if (clkevt_periodic) {
-
/* Timer: configure load and background-load, and fire it up */
writel(nmdk_cycle, mtu_base + MTU_LR(1));
writel(nmdk_cycle, mtu_base + MTU_BGLR(1));
@@ -120,7 +113,6 @@ void nmdk_clkevt_reset(void)
static void nmdk_clkevt_mode(enum clock_event_mode mode,
struct clock_event_device *dev)
{
-
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
clkevt_periodic = true;
@@ -224,17 +216,8 @@ void __init nmdk_timer_init(void __iomem *base)
setup_sched_clock(nomadik_read_sched_clock, 32, rate);
#endif
- /* Timer 1 is used for events */
-
- clockevents_calc_mult_shift(&nmdk_clkevt, rate, MTU_MIN_RANGE);
-
- nmdk_clkevt.max_delta_ns =
- clockevent_delta2ns(0xffffffff, &nmdk_clkevt);
- nmdk_clkevt.min_delta_ns =
- clockevent_delta2ns(0x00000002, &nmdk_clkevt);
- nmdk_clkevt.cpumask = cpumask_of(0);
-
- /* Register irq and clockevents */
+ /* Timer 1 is used for events, register irq and clockevents */
setup_irq(IRQ_MTU0, &nmdk_timer_irq);
- clockevents_register_device(&nmdk_clkevt);
+ nmdk_clkevt.cpumask = cpumask_of(0);
+ clockevents_config_and_register(&nmdk_clkevt, rate, 2, 0xffffffffU);
}