diff options
Diffstat (limited to 'arch/sh/kernel/timers/timer-tmu.c')
| -rw-r--r-- | arch/sh/kernel/timers/timer-tmu.c | 63 |
1 files changed, 4 insertions, 59 deletions
diff --git a/arch/sh/kernel/timers/timer-tmu.c b/arch/sh/kernel/timers/timer-tmu.c index 205816fcf0da..24927015dc31 100644 --- a/arch/sh/kernel/timers/timer-tmu.c +++ b/arch/sh/kernel/timers/timer-tmu.c @@ -80,8 +80,7 @@ static unsigned long tmu_timer_get_offset(void) return count; } -static irqreturn_t tmu_timer_interrupt(int irq, void *dev_id, - struct pt_regs *regs) +static irqreturn_t tmu_timer_interrupt(int irq, void *dummy) { unsigned long timer_status; @@ -98,7 +97,7 @@ static irqreturn_t tmu_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; @@ -111,60 +110,6 @@ static struct irqaction tmu_irq = { .mask = CPU_MASK_NONE, }; -/* - * Hah! We'll see if this works (switching from usecs to nsecs). - */ -static unsigned long tmu_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_outb(0, TMU_TSTR); -#if !defined(CONFIG_CPU_SUBTYPE_SH7300) && !defined(CONFIG_CPU_SUBTYPE_SH7760) - ctrl_outb(TMU_TOCR_INIT, TMU_TOCR); -#endif - ctrl_outw(TMU0_TCR_CALIB, TMU0_TCR); - ctrl_outl(0xffffffff, TMU0_TCOR); - ctrl_outl(0xffffffff, TMU0_TCNT); - - 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_outb(TMU_TSTR_INIT, TMU_TSTR); - - do { - rtc_sh_get_time(&ts2); - } while (ts1.tv_nsec == ts2.tv_nsec && ts1.tv_sec == ts2.tv_sec); - - freq = 0xffffffff - ctrl_inl(TMU0_TCNT); - 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 tmu_clk_init(struct clk *clk) { u8 divisor = TMU0_TCR_INIT & 0x7; @@ -232,12 +177,12 @@ struct sys_timer_ops tmu_timer_ops = { .init = tmu_timer_init, .start = tmu_timer_start, .stop = tmu_timer_stop, - .get_frequency = tmu_timer_get_frequency, +#ifndef CONFIG_GENERIC_TIME .get_offset = tmu_timer_get_offset, +#endif }; struct sys_timer tmu_timer = { .name = "tmu", .ops = &tmu_timer_ops, }; - |