clockevents/drivers/metag: Set ->min_delta_ticks and ->max_delta_ticks

In preparation for making the clockevents core NTP correction aware,
all clockevent device drivers must set ->min_delta_ticks and
->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a
clockevent device's rate is going to change dynamically and thus, the
ratio of ns to ticks ceases to stay invariant.

Make the metag_generic clockevent driver initialize these fields properly.

This patch alone doesn't introduce any change in functionality as the
clockevents core still looks exclusively at the (untouched) ->min_delta_ns
and ->max_delta_ns. As soon as this has changed, a followup patch will
purge the initialization of ->min_delta_ns and ->max_delta_ns from this
driver.

Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: James Hogan <james.hogan@imgtec.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/drivers/clocksource/metag_generic.c b/drivers/clocksource/metag_generic.c
index 6fcf96540631d2d9a53a1f64978e99d4cc2f26ab..3e5fa2f62d5f8cc7c8ce78a7cfcee713182360c3 100644 (file)
--- a/drivers/clocksource/metag_generic.c
+++ b/drivers/clocksource/metag_generic.c
@@ -114,7 +114,9 @@ static int arch_timer_starting_cpu(unsigned int cpu)
 
        clk->mult = div_sc(hwtimer_freq, NSEC_PER_SEC, clk->shift);
        clk->max_delta_ns = clockevent_delta2ns(0x7fffffff, clk);
+       clk->max_delta_ticks = 0x7fffffff;
        clk->min_delta_ns = clockevent_delta2ns(0xf, clk);
+       clk->min_delta_ticks = 0xf;
        clk->cpumask = cpumask_of(cpu);
 
        clockevents_register_device(clk);