[PATCH] mn10300/cevt-mn10300: set ->min_delta_ticks and ->max_delta_ticks

Nicolai Stange
2017-03-30T19:48:33Z

Make the mn10300 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>
---

Notes:
This prerequisite patch is part of a larger effort to feed NTP
corrections into the clockevent devices' frequencies and thus
avoiding their notion of time to diverge from the system's
one. If you're interested, the current state of the whole series
can be found at [1].

If you haven't got any objections and these prerequisites get
merged by 4.12 everywhere, I'll proceed with the remainder of
this series in 4.13.

Applicable to next-20170324 as well as to John' Stultz tree [2].

[1]
git://nicst.de/linux.git cev-freq-adj.v10.fortglx-4.12-time
https://nicst.de/git/?p=linux.git;a=shortlog;h=refs/heads/cev-freq-adj.v10.fortglx-4.12-time

[2]
https://git.linaro.org/people/john.stultz/linux.git fortglx/4.12/time

arch/mn10300/kernel/cevt-mn10300.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/mn10300/kernel/cevt-mn10300.c b/arch/mn10300/kernel/cevt-mn10300.c
index d9b34dd44f04..2b21bbc9efa4 100644
--- a/arch/mn10300/kernel/cevt-mn10300.c
+++ b/arch/mn10300/kernel/cevt-mn10300.c
@@ -98,7 +98,9 @@ int __init init_clockevents(void)

/* Calculate the min / max delta */
cd->max_delta_ns = clockevent_delta2ns(TMJCBR_MAX, cd);
+ cd->max_delta_ticks = TMJCBR_MAX;
cd->min_delta_ns = clockevent_delta2ns(100, cd);
+ cd->min_delta_ticks = 100;

cd->rating = 200;
cd->cpumask = cpumask_of(smp_processor_id());
--
2.12.0