1 files changed, 5 insertions, 58 deletions

diff --git a/arch/sh/kernel/timers/timer-cmt.c b/arch/sh/kernel/timers/timer-cmt.c
index 9eab395cd34..30687383d4b 100644
--- a/arch/sh/kernel/timers/timer-cmt.c
+++ b/arch/sh/kernel/timers/timer-cmt.c
@@ -96,8 +96,7 @@ static unsigned long cmt_timer_get_offset(void)
         return count;
 }
 
-static irqreturn_t cmt_timer_interrupt(int irq, void *dev_id,
-                                       struct pt_regs *regs)
+static irqreturn_t cmt_timer_interrupt(int irq, void *dev_id)
 {
         unsigned long timer_status;
 
@@ -114,7 +113,7 @@ static irqreturn_t cmt_timer_interrupt(int irq, void *dev_id,
          * locally disabled. -arca
          */
         write_seqlock(&xtime_lock);
-        handle_timer_tick(regs);
+        handle_timer_tick();
         write_sequnlock(&xtime_lock);
 
         return IRQ_HANDLED;
@@ -123,62 +122,10 @@ static irqreturn_t cmt_timer_interrupt(int irq, void *dev_id,
 static struct irqaction cmt_irq = {
         .name           = "timer",
         .handler        = cmt_timer_interrupt,
-        .flags          = SA_INTERRUPT,
+        .flags          = IRQF_DISABLED,
         .mask           = CPU_MASK_NONE,
 };
 
-/*
- * Hah!  We'll see if this works (switching from usecs to nsecs).
- */
-static unsigned long cmt_timer_get_frequency(void)
-{
-        u32 freq;
-        struct timespec ts1, ts2;
-        unsigned long diff_nsec;
-        unsigned long factor;
-
-        /* Setup the timer:  We don't want to generate interrupts, just
-         * have it count down at its natural rate.
-         */
-        
-        ctrl_outw(ctrl_inw(CMT_CMSTR) & ~0x01, CMT_CMSTR);
-        ctrl_outw(CMT_CMCSR_CALIB, CMT_CMCSR_0);
-        ctrl_outw(0xffff, CMT_CMCOR_0);
-        ctrl_outw(0xffff, CMT_CMCNT_0);
-
-        rtc_sh_get_time(&ts2);
-
-        do {
-                rtc_sh_get_time(&ts1);
-        } while (ts1.tv_nsec == ts2.tv_nsec && ts1.tv_sec == ts2.tv_sec);
-
-        /* actually start the timer */
-        ctrl_outw(ctrl_inw(CMT_CMSTR) | 0x01, CMT_CMSTR);
-
-        do {
-                rtc_sh_get_time(&ts2);
-        } while (ts1.tv_nsec == ts2.tv_nsec && ts1.tv_sec == ts2.tv_sec);
-
-        freq = 0xffff - ctrl_inw(CMT_CMCNT_0);
-        if (ts2.tv_nsec < ts1.tv_nsec) {
-                ts2.tv_nsec += 1000000000;
-                ts2.tv_sec--;
-        }
-
-        diff_nsec = (ts2.tv_sec - ts1.tv_sec) * 1000000000 + (ts2.tv_nsec - ts1.tv_nsec);
-
-        /* this should work well if the RTC has a precision of n Hz, where
-         * n is an integer.  I don't think we have to worry about the other
-         * cases. */
-        factor = (1000000000 + diff_nsec/2) / diff_nsec;
-
-        if (factor * diff_nsec > 1100000000 ||
-            factor * diff_nsec <  900000000)
-                panic("weird RTC (diff_nsec %ld)", diff_nsec);
-
-        return freq * factor;
-}
-
 static void cmt_clk_init(struct clk *clk)
 {
         u8 divisor = CMT_CMCSR_INIT & 0x3;
@@ -245,12 +192,12 @@ struct sys_timer_ops cmt_timer_ops = {
         .init           = cmt_timer_init,
         .start          = cmt_timer_start,
         .stop           = cmt_timer_stop,
-        .get_frequency  = cmt_timer_get_frequency,
+#ifndef CONFIG_GENERIC_TIME
         .get_offset     = cmt_timer_get_offset,
+#endif
 };
 
 struct sys_timer cmt_timer = {
         .name   = "cmt",
         .ops    = &cmt_timer_ops,
 };
-