leon: use CONFIG_SYS_HZ to config timer prescaler
Before it was hardcoded to 1000 ticks per second.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
diff --git a/arch/sparc/cpu/leon3/cpu_init.c b/arch/sparc/cpu/leon3/cpu_init.c
index 4720f42..57ffa96 100644
--- a/arch/sparc/cpu/leon3/cpu_init.c
+++ b/arch/sparc/cpu/leon3/cpu_init.c
@@ -14,6 +14,9 @@
#include <config.h>
+#define TIMER_BASE_CLK 1000000
+#define US_PER_TICK (1000000 / CONFIG_SYS_HZ)
+
DECLARE_GLOBAL_DATA_PTR;
/* reset CPU (jump to 0, without reset) */
@@ -203,15 +206,15 @@
while (get_timer(start) < ticks) ;
}
-/* initiate and setup timer0 interrupt to 1MHz
+/* initiate and setup timer0 interrupt to configured HZ. Base clock is 1MHz.
* Return irq number for timer int or a negative number for
* dealing with self
*/
int timer_interrupt_init_cpu(void)
{
- /* 1ms ticks */
+ /* SYS_HZ ticks per second */
gptimer->e[0].val = 0;
- gptimer->e[0].rld = 999; /* (((1000000 / 100) - 1)) */
+ gptimer->e[0].rld = (TIMER_BASE_CLK / CONFIG_SYS_HZ) - 1;
gptimer->e[0].ctrl =
(LEON3_GPTIMER_EN |
LEON3_GPTIMER_RL | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
@@ -224,14 +227,12 @@
*/
unsigned long cpu_usec2ticks(unsigned long usec)
{
- /* timer set to 1kHz ==> 1 clk tick = 1 msec */
- if (usec < 1000)
+ if (usec < US_PER_TICK)
return 1;
- return (usec / 1000);
+ return usec / US_PER_TICK;
}
unsigned long cpu_ticks2usec(unsigned long ticks)
{
- /* 1tick = 1usec */
- return ticks * 1000;
+ return ticks * US_PER_TICK;
}