Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > linux.kernel > #1244419

Re: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to suspending

From Alexandre Belloni <alexandre.belloni@free-electrons.com>
Newsgroups linux.kernel
Subject Re: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to suspending
Date 2015-10-12 09:00 +0200
Message-ID <qiFfs-83W-19@gated-at.bofh.it> (permalink)
References <qiA65-Dv-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw


Hi Wenyou,

On 12/10/2015 at 09:17:57 +0800, Wenyou Yang wrote :
> This patch is to clear the RTC alarm status flag prior to suspending
> to avoid the erroneous wake-up activity.
> 

Is this a new issue appearing with the sama5d2 or was it present from
the beginning?

> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> ---
> 
>  drivers/rtc/rtc-at91rm9200.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
> index cb62e21..b60fd47 100644
> --- a/drivers/rtc/rtc-at91rm9200.c
> +++ b/drivers/rtc/rtc-at91rm9200.c
> @@ -495,6 +495,8 @@ static int at91_rtc_suspend(struct device *dev)
>  	/* this IRQ is shared with DBGU and other hardware which isn't
>  	 * necessarily doing PM like we are...
>  	 */
> +	at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
> +
>  	at91_rtc_imr = at91_rtc_read_imr()
>  			& (AT91_RTC_ALARM|AT91_RTC_SECEV);
>  	if (at91_rtc_imr) {
> -- 
> 1.7.9.5
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | NextPrevious in thread | Next in thread | Find similar | Unroll thread


Thread

[PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to suspending Wenyou Yang <wenyou.yang@atmel.com> - 2015-10-12 03:30 +0200
  Re: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to  suspending Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-10-12 09:00 +0200
    RE: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to  suspending "Yang, Wenyou" <Wenyou.Yang@atmel.com> - 2015-10-12 09:50 +0200
      Re: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to  suspending Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-10-12 10:00 +0200
        RE: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to  suspending "Yang, Wenyou" <Wenyou.Yang@atmel.com> - 2015-10-12 10:00 +0200

csiph-web