Messages in this thread Patch in this message | | | From | Alexandre Belloni <> | Subject | [PATCH 2/3] clocksource/drivers: timer-of: parse the chosen node | Date | Wed, 13 Dec 2017 19:53:12 +0100 |
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Add a way for drivers to know whether the timer they are currently handling is a clocksource or a clockevent.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> --- drivers/clocksource/timer-of.c | 22 ++++++++++++++++++++++ drivers/clocksource/timer-of.h | 3 +++ 2 files changed, 25 insertions(+)
diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c index a31990408153..71680eacd390 100644 --- a/drivers/clocksource/timer-of.c +++ b/drivers/clocksource/timer-of.c @@ -195,3 +195,25 @@ void __init timer_of_cleanup(struct timer_of *to) if (to->flags & TIMER_OF_BASE) timer_base_exit(&to->of_base); } + +int __init timer_of_is_type(struct device_node *np, char *type) +{ + struct device_node *node, *timer; + + if (!of_chosen) + return 0; + + node = of_get_child_by_name(of_chosen, type); + if (!node) + return 0; + + timer = of_parse_phandle(node, "timer", 0); + of_node_put(node); + if (!timer) + return 0; + + if (timer == np) + return 1; + + return 0; +} diff --git a/drivers/clocksource/timer-of.h b/drivers/clocksource/timer-of.h index 3f708f1be43d..24923cfe748d 100644 --- a/drivers/clocksource/timer-of.h +++ b/drivers/clocksource/timer-of.h @@ -70,4 +70,7 @@ extern int __init timer_of_init(struct device_node *np, extern void __init timer_of_cleanup(struct timer_of *to); +extern int __init timer_of_is_type(struct device_node *np, char *type); +#define timer_of_is_clocksource(np) timer_of_is_type(np, "linux,clocksource") +#define timer_of_is_clockevent(np) timer_of_is_type(np, "linux,clockevent") #endif -- 2.15.1
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