Pull acpi_bus_register_driver into release branch

[pandora-kernel.git] / arch / mips / au1000 / common / time.c

diff --git a/arch/mips/au1000/common/time.c b/arch/mips/au1000/common/time.c
index 57675b4..f74d66a 100644 (file)
--- 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
 
@@ -114,20 +116,20 @@ void mips_timer_interrupt(struct pt_regs *regs)
 
 null:
        ack_r4ktimer(0);
+       irq_exit();
 }
 
 #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 +166,8 @@ 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
@@ -356,7 +360,7 @@ static unsigned long do_fast_cp0_gettimeoffset(void)
                : "hi", "lo", GCC_REG_ACCUM);
 
        /*
-        * Due to possible jiffies inconsistencies, we need to check
+        * Due to possible jiffies inconsistencies, we need to check
         * the result so that we'll get a timer that is monotonic.
         */
        if (res >= USECS_PER_JIFFY)
@@ -388,7 +392,6 @@ 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 +444,18 @@ 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