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-rw-r--r--drivers/clocksource/bcm_kona_timer.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c
index 5176e76..974b2db 100644
--- a/drivers/clocksource/bcm_kona_timer.c
+++ b/drivers/clocksource/bcm_kona_timer.c
@@ -17,6 +17,7 @@
#include <linux/jiffies.h>
#include <linux/clockchips.h>
#include <linux/types.h>
+#include <linux/clk.h>
#include <linux/io.h>
#include <asm/mach/time.h>
@@ -101,11 +102,18 @@ kona_timer_get_counter(void *timer_base, uint32_t *msw, uint32_t *lsw)
static void __init kona_timers_init(struct device_node *node)
{
u32 freq;
+ struct clk *external_clk;
- if (!of_property_read_u32(node, "clock-frequency", &freq))
+ external_clk = of_clk_get_by_name(node, NULL);
+
+ if (!IS_ERR(external_clk)) {
+ arch_timer_rate = clk_get_rate(external_clk);
+ clk_prepare_enable(external_clk);
+ } else if (!of_property_read_u32(node, "clock-frequency", &freq)) {
arch_timer_rate = freq;
- else
- panic("clock-frequency not set in the .dts file");
+ } else {
+ panic("unable to determine clock-frequency");
+ }
/* Setup IRQ numbers */
timers.tmr_irq = irq_of_parse_and_map(node, 0);