Re: [Qemu-devel] [PATCH] rtc: remove dead SQW IRQ code

[Jan Kiszka]

On 2013-08-14 13:29, Jan Kiszka wrote:
> This was once introduced by commit 100d9891d6 but was never used in-tree
> and then got broken by commit 32e0c8260d. Time to clean up.
> 
> Signed-off-by: Jan Kiszka <address@hidden>
> ---
>  hw/timer/mc146818rtc.c |    9 +--------
>  1 files changed, 1 insertions(+), 8 deletions(-)
> 
> diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c
> index 3c3baac..b3f1baa 100644
> --- a/hw/timer/mc146818rtc.c
> +++ b/hw/timer/mc146818rtc.c
> @@ -70,7 +70,6 @@ typedef struct RTCState {
>      uint64_t last_update;
>      int64_t offset;
>      qemu_irq irq;
> -    qemu_irq sqw_irq;
>      int it_shift;
>      /* periodic timer */
>      QEMUTimer *periodic_timer;
> @@ -151,8 +150,7 @@ static void periodic_timer_update(RTCState *s, int64_t 
> current_time)
>  
>      period_code = s->cmos_data[RTC_REG_A] & 0x0f;
>      if (period_code != 0
> -        && ((s->cmos_data[RTC_REG_B] & REG_B_PIE)
> -            || ((s->cmos_data[RTC_REG_B] & REG_B_SQWE) && s->sqw_irq))) {
> +        && (s->cmos_data[RTC_REG_B] & REG_B_PIE)) {
>          if (period_code <= 2)
>              period_code += 7;
>          /* period in 32 Khz cycles */
> @@ -202,11 +200,6 @@ static void rtc_periodic_timer(void *opaque)
>  #endif
>          qemu_irq_raise(s->irq);
>      }
> -    if (s->cmos_data[RTC_REG_B] & REG_B_SQWE) {
> -        /* Not square wave at all but we don't want 2048Hz interrupts!
> -           Must be seen as a pulse.  */
> -        qemu_irq_raise(s->sqw_irq);
> -    }
>  }
>  
>  /* handle update-ended timer */
> 

ping

Jan

-- 
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux