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>

diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c
index 954a862ec4aaa4315d0b1697489c4f949e9d4ebf..9222e5522a43e97236c86f55c28006c1bea3a8e2 100644 (file)
--- a/arch/arm/plat-nomadik/timer.c
+++ b/arch/arm/plat-nomadik/timer.c
@@ -20,12 +20,6 @@
 #include <asm/mach/time.h>
 #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);
 }