arm: arch_timer: export function to read physical counter
Since the arch_timer is a system-wide block, other hardware in an SoC
can make use of the counter values. Export a way to read the physical
counter for use by other drivers.
Change-Id: I0bcd95fa4cd7507c41ac608fc9740955d15d4b88
Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
diff --git a/arch/arm/kernel/arch_timer.c b/arch/arm/kernel/arch_timer.c
index 87bb7d3..43c627d 100644
--- a/arch/arm/kernel/arch_timer.c
+++ b/arch/arm/kernel/arch_timer.c
@@ -22,6 +22,7 @@
#include <linux/of_address.h>
#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/export.h>
#include <asm/cputype.h>
#include <asm/localtimer.h>
@@ -315,10 +316,16 @@
return ((cycle_t) cvalh << 32) | cvall;
}
-static cycle_t arch_counter_read(struct clocksource *cs)
+cycle_t arch_counter_get_cntpct(void)
{
return arch_specific_timer->get_cntpct();
}
+EXPORT_SYMBOL(arch_counter_get_cntpct);
+
+static cycle_t arch_counter_read(struct clocksource *cs)
+{
+ return arch_counter_get_cntpct();
+}
#ifdef ARCH_HAS_READ_CURRENT_TIMER
int read_current_timer(unsigned long *timer_val)