microblaze: Set ->min_delta_ticks and ->max_delta_ticks for timer

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 microblaze arch's 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.

Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index 9990661927155380bda1daf610d82e039a7b7e28..545ccd46edb371f3b4e9a036604ae4bf0fa45e11 100644 (file)
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -178,8 +178,10 @@ static __init int xilinx_clockevent_init(void)
                                clockevent_xilinx_timer.shift);
        clockevent_xilinx_timer.max_delta_ns =
                clockevent_delta2ns((u32)~0, &clockevent_xilinx_timer);
+       clockevent_xilinx_timer.max_delta_ticks = (u32)~0;
        clockevent_xilinx_timer.min_delta_ns =
                clockevent_delta2ns(1, &clockevent_xilinx_timer);
+       clockevent_xilinx_timer.min_delta_ticks = 1;
        clockevent_xilinx_timer.cpumask = cpumask_of(0);
        clockevents_register_device(&clockevent_xilinx_timer);