lkml.org 
[lkml]   [2017]   [Dec]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/3] clocksource/drivers: timer-of: parse the chosen node
Date
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
\
 
 \ /
  Last update: 2017-12-13 19:54    [W:0.134 / U:0.760 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site