From a3b86a6d6f5a7592192eb3fca22ae38de18f2171 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 11 Jan 2012 09:57:56 +0100 Subject: 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 Signed-off-by: Linus Walleij --- arch/arm/plat-nomadik/timer.c | 23 +++-------------------- 1 file changed, 3 insertions(+), 20 deletions(-) (limited to 'arch/arm/plat-nomadik') diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index 954a862ec4aa..9222e5522a43 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -20,12 +20,6 @@ #include #include -/* - * 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); } -- cgit v1.2.3-55-g7522