summaryrefslogtreecommitdiffstats
path: root/arch/microblaze/kernel/timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/microblaze/kernel/timer.c')
-rw-r--r--arch/microblaze/kernel/timer.c41
1 files changed, 25 insertions, 16 deletions
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index b1380ae93ae..a5aa33db1df 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -38,6 +38,9 @@ static unsigned int timer_baseaddr;
#define TIMER_BASE timer_baseaddr
#endif
+unsigned int freq_div_hz;
+unsigned int timer_clock_freq;
+
#define TCSR0 (0x00)
#define TLR0 (0x04)
#define TCR0 (0x08)
@@ -115,7 +118,7 @@ static void microblaze_timer_set_mode(enum clock_event_mode mode,
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
printk(KERN_INFO "%s: periodic\n", __func__);
- microblaze_timer0_start_periodic(cpuinfo.freq_div_hz);
+ microblaze_timer0_start_periodic(freq_div_hz);
break;
case CLOCK_EVT_MODE_ONESHOT:
printk(KERN_INFO "%s: oneshot\n", __func__);
@@ -168,7 +171,7 @@ static struct irqaction timer_irqaction = {
static __init void microblaze_clockevent_init(void)
{
clockevent_microblaze_timer.mult =
- div_sc(cpuinfo.cpu_clock_freq, NSEC_PER_SEC,
+ div_sc(timer_clock_freq, NSEC_PER_SEC,
clockevent_microblaze_timer.shift);
clockevent_microblaze_timer.max_delta_ns =
clockevent_delta2ns((u32)~0, &clockevent_microblaze_timer);
@@ -201,7 +204,7 @@ static struct cyclecounter microblaze_cc = {
int __init init_microblaze_timecounter(void)
{
- microblaze_cc.mult = div_sc(cpuinfo.cpu_clock_freq, NSEC_PER_SEC,
+ microblaze_cc.mult = div_sc(timer_clock_freq, NSEC_PER_SEC,
microblaze_cc.shift);
timecounter_init(&microblaze_tc, &microblaze_cc, sched_clock());
@@ -221,7 +224,7 @@ static struct clocksource clocksource_microblaze = {
static int __init microblaze_clocksource_init(void)
{
clocksource_microblaze.mult =
- clocksource_hz2mult(cpuinfo.cpu_clock_freq,
+ clocksource_hz2mult(timer_clock_freq,
clocksource_microblaze.shift);
if (clocksource_register(&clocksource_microblaze))
panic("failed to register clocksource");
@@ -247,6 +250,7 @@ void __init time_init(void)
u32 irq, i = 0;
u32 timer_num = 1;
struct device_node *timer = NULL;
+ const void *prop;
#ifdef CONFIG_SELFMOD_TIMER
unsigned int timer_baseaddr = 0;
int arr_func[] = {
@@ -258,12 +262,10 @@ void __init time_init(void)
0
};
#endif
- char *timer_list[] = {
- "xlnx,xps-timer-1.00.a",
- "xlnx,opb-timer-1.00.b",
- "xlnx,opb-timer-1.00.a",
- NULL
- };
+ const char * const timer_list[] = {
+ "xlnx,xps-timer-1.00.a",
+ NULL
+ };
for (i = 0; timer_list[i] != NULL; i++) {
timer = of_find_compatible_node(NULL, NULL, timer_list[i]);
@@ -272,13 +274,13 @@ void __init time_init(void)
}
BUG_ON(!timer);
- timer_baseaddr = *(int *) of_get_property(timer, "reg", NULL);
+ timer_baseaddr = be32_to_cpup(of_get_property(timer, "reg", NULL));
timer_baseaddr = (unsigned long) ioremap(timer_baseaddr, PAGE_SIZE);
- irq = *(int *) of_get_property(timer, "interrupts", NULL);
- timer_num =
- *(int *) of_get_property(timer, "xlnx,one-timer-only", NULL);
+ irq = be32_to_cpup(of_get_property(timer, "interrupts", NULL));
+ timer_num = be32_to_cpup(of_get_property(timer,
+ "xlnx,one-timer-only", NULL));
if (timer_num) {
- printk(KERN_EMERG "Please enable two timers in HW\n");
+ eprintk(KERN_EMERG "Please enable two timers in HW\n");
BUG();
}
@@ -288,7 +290,14 @@ void __init time_init(void)
printk(KERN_INFO "%s #0 at 0x%08x, irq=%d\n",
timer_list[i], timer_baseaddr, irq);
- cpuinfo.freq_div_hz = cpuinfo.cpu_clock_freq / HZ;
+ /* If there is clock-frequency property than use it */
+ prop = of_get_property(timer, "clock-frequency", NULL);
+ if (prop)
+ timer_clock_freq = be32_to_cpup(prop);
+ else
+ timer_clock_freq = cpuinfo.cpu_clock_freq;
+
+ freq_div_hz = timer_clock_freq / HZ;
setup_irq(irq, &timer_irqaction);
#ifdef CONFIG_HEART_BEAT