summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-shmobile/timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-shmobile/timer.c')
-rw-r--r--arch/arm/mach-shmobile/timer.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/timer.c b/arch/arm/mach-shmobile/timer.c
index 8b79e79..a689197 100644
--- a/arch/arm/mach-shmobile/timer.c
+++ b/arch/arm/mach-shmobile/timer.c
@@ -19,9 +19,27 @@
*
*/
#include <linux/platform_device.h>
+#include <linux/delay.h>
#include <asm/mach/time.h>
#include <asm/smp_twd.h>
+void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
+ unsigned int mult, unsigned int div)
+{
+ /* calculate a worst-case loops-per-jiffy value
+ * based on maximum cpu core mhz setting and the
+ * __delay() implementation in arch/arm/lib/delay.S
+ *
+ * this will result in a longer delay than expected
+ * when the cpu core runs on lower frequencies.
+ */
+
+ unsigned int value = (1000000 * mult) / (HZ * div);
+
+ if (!preset_lpj)
+ preset_lpj = max_cpu_core_mhz * value;
+}
+
static void __init shmobile_late_time_init(void)
{
/*