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authorDaniel Lezcano <daniel.lezcano@linaro.org>2016-04-19 09:56:27 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2017-02-07 22:58:30 +0300
commit376bc27150f180d9f5eddec6a14117780177589d (patch)
tree351ff374c682dfe42c0e24e4c1df5b02bd01e824 /include/linux/clockchips.h
parent668802c25729a8e3423015c33c05f1c3be3858e9 (diff)
downloadlinux-376bc27150f180d9f5eddec6a14117780177589d.tar.xz
clockevents: Add a clkevt-of mechanism like clksrc-of
The current code uses the CLOCKSOURCE_OF_DECLARE macro to fill the clksrc table with a t-uple (name, init_function). Unfortunately it ends up to the clockevent and the clocksource being both initialized with this macro. It is not a problem by itself but there is not a clear distinction between a clockevent and a clocksource in the code initialization path. Somebody can argue there are the same IP block and the same DT node. But conceptually from the software side, there are two distincts entities and as is they should be initialized separetely. Some drivers which do not have a clocksource end up by using the CLOCKSOURCE_OF_DECLARE macro to declare a clockevent. Another result is the fuzzy organization in the clocksource directory, where the clockevents are implemented in the same file than the clocksources or file labelled timer-something implementing a clocksource. This patch provides another macro to specifically declare a clockevent in the same way than the clocksource and gives the opportunity to write two separate drivers, one for the clocksource and another for the clockevents. Hopefully, that can help to do some housework in the directory, perhaps split the drivers in to entities, for example: - clksrc-rockchip.c - clkevt-rockchip.c Also, it gives the possibility to declare clocksources separately in the DT and then use a clocksource from IP block while while clockevents are used from another IP block. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'include/linux/clockchips.h')
-rw-r--r--include/linux/clockchips.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index 0d442e34c349..5d3053c34fb3 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -224,4 +224,13 @@ static inline void tick_setup_hrtimer_broadcast(void) { }
#endif /* !CONFIG_GENERIC_CLOCKEVENTS */
+#define CLOCKEVENT_OF_DECLARE(name, compat, fn) \
+ OF_DECLARE_1_RET(clkevt, name, compat, fn)
+
+#ifdef CONFIG_CLKEVT_PROBE
+extern int clockevent_probe(void);
+#els
+static inline int clockevent_probe(void) { return 0; }
+#endif
+
#endif /* _LINUX_CLOCKCHIPS_H */