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>

arch/sparc/cpu/leon2/cpu_init.c

@@ -13,6 +13,9 @@
 
 #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) */
@@ -90,7 +93,7 @@ void cpu_wait_ticks(unsigned long ticks)
 	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
  */
@@ -98,9 +101,9 @@ int timer_interrupt_init_cpu(void)
 {
 	LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
 
-	/* 1ms ticks */
+	/* SYS_HZ ticks per second */
 	leon2->Timer_Counter_1 = 0;
-	leon2->Timer_Reload_1 = 999;	/* (((1000000 / 100) - 1)) */
+	leon2->Timer_Reload_1 = (TIMER_BASE_CLK / CONFIG_SYS_HZ) - 1;
 	leon2->Timer_Control_1 =
 	    (LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD);
 
@@ -112,14 +115,12 @@ int timer_interrupt_init_cpu(void)
  */
 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;
 }

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 @@ void cpu_wait_ticks(unsigned long ticks)
 	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 @@ int timer_interrupt_init_cpu(void)
  */
 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;
 }