summaryrefslogtreecommitdiffstats
path: root/arch/mips/au1000/common/time.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/au1000/common/time.c')
-rw-r--r--arch/mips/au1000/common/time.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/arch/mips/au1000/common/time.c b/arch/mips/au1000/common/time.c
index 57675b41480e..883d3f3d8c53 100644
--- a/arch/mips/au1000/common/time.c
+++ b/arch/mips/au1000/common/time.c
@@ -50,7 +50,6 @@
#include <linux/mc146818rtc.h>
#include <linux/timex.h>
-extern void startup_match20_interrupt(void);
extern void do_softirq(void);
extern volatile unsigned long wall_jiffies;
unsigned long missed_heart_beats = 0;
@@ -58,14 +57,17 @@ unsigned long missed_heart_beats = 0;
static unsigned long r4k_offset; /* Amount to increment compare reg each time */
static unsigned long r4k_cur; /* What counter should be at next timer irq */
int no_au1xxx_32khz;
-void (*au1k_wait_ptr)(void);
+extern int allow_au1k_wait; /* default off for CP0 Counter */
/* Cycle counter value at the previous timer interrupt.. */
static unsigned int timerhi = 0, timerlo = 0;
#ifdef CONFIG_PM
-#define MATCH20_INC 328
-extern void startup_match20_interrupt(void);
+#if HZ < 100 || HZ > 1000
+#error "unsupported HZ value! Must be in [100,1000]"
+#endif
+#define MATCH20_INC (328*100/HZ) /* magic number 328 is for HZ=100... */
+extern void startup_match20_interrupt(irqreturn_t (*handler)(int, void *, struct pt_regs *));
static unsigned long last_pc0, last_match20;
#endif
@@ -117,17 +119,16 @@ null:
}
#ifdef CONFIG_PM
-void counter0_irq(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t counter0_irq(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned long pc0;
int time_elapsed;
static int jiffie_drift = 0;
- kstat.irqs[0][irq]++;
if (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20) {
/* should never happen! */
- printk(KERN_WARNING "counter 0 w status eror\n");
- return;
+ printk(KERN_WARNING "counter 0 w status error\n");
+ return IRQ_NONE;
}
pc0 = au_readl(SYS_TOYREAD);
@@ -164,6 +165,8 @@ void counter0_irq(int irq, void *dev_id, struct pt_regs *regs)
update_process_times(user_mode(regs));
#endif
}
+
+ return IRQ_HANDLED;
}
/* When we wakeup from sleep, we have to "catch up" on all of the
@@ -388,7 +391,6 @@ void au1xxx_timer_setup(struct irqaction *irq)
{
unsigned int est_freq;
extern unsigned long (*do_gettimeoffset)(void);
- extern void au1k_wait(void);
printk("calculating r4koff... ");
r4k_offset = cal_r4koff();
@@ -441,18 +443,18 @@ void au1xxx_timer_setup(struct irqaction *irq)
au_sync();
while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20);
- /* setup match20 to interrupt once every 10ms */
+ /* setup match20 to interrupt once every HZ */
last_pc0 = last_match20 = au_readl(SYS_TOYREAD);
au_writel(last_match20 + MATCH20_INC, SYS_TOYMATCH2);
au_sync();
while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20);
- startup_match20_interrupt();
+ startup_match20_interrupt(counter0_irq);
do_gettimeoffset = do_fast_pm_gettimeoffset;
/* We can use the real 'wait' instruction.
*/
- au1k_wait_ptr = au1k_wait;
+ allow_au1k_wait = 1;
}
#else
OpenPOWER on IntegriCloud