linux-kernel - Re: [RFC PATCH v2 6/9] rtc/mxc: Modify rtc_update

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Date:	Wed, 14 Jan 2015 23:13:04 +0800
From:	Xunlei Pang <pang.xunlei@...aro.org>
To:	Xunlei Pang <xlpang@....com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	John Stultz <john.stultz@...aro.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>,
	"rtc-linux@...glegroups.com" <rtc-linux@...glegroups.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Fabio Estevam <fabio.estevam@...escale.com>
Subject: Re: [RFC PATCH v2 6/9] rtc/mxc: Modify rtc_update_alarm() not to
 touch the alarm time

Cc Fabio Estevam <fabio.estevam@...escale.com>

On 13 January 2015 at 23:44, Xunlei Pang <xlpang@....com> wrote:
> From: Xunlei Pang <pang.xunlei@...aro.org>
>
> rtc_class_ops's set_alarm() shouldn't deal with the alarm date,
> as this is handled in the rtc core.
>
> See rtc_dev_ioctl()'s RTC_ALM_SET and RTC_WKALM_SET cases.
>
> Signed-off-by: Xunlei Pang <pang.xunlei@...aro.org>
> ---
>  drivers/rtc/rtc-mxc.c | 22 ++++------------------
>  1 file changed, 4 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
> index 3c3f8d1..a7b218f 100644
> --- a/drivers/rtc/rtc-mxc.c
> +++ b/drivers/rtc/rtc-mxc.c
> @@ -173,29 +173,18 @@ static void set_alarm_or_time(struct device *dev, int time_alarm, u32 time)
>   * This function updates the RTC alarm registers and then clears all the
>   * interrupt status bits.
>   */
> -static int rtc_update_alarm(struct device *dev, struct rtc_time *alrm)
> +static void rtc_update_alarm(struct device *dev, struct rtc_time *alrm)
>  {
> -       struct rtc_time alarm_tm, now_tm;
> -       unsigned long now, time;
> +       unsigned long time;
>         struct platform_device *pdev = to_platform_device(dev);
>         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
>         void __iomem *ioaddr = pdata->ioaddr;
>
> -       now = get_alarm_or_time(dev, MXC_RTC_TIME);
> -       rtc_time_to_tm(now, &now_tm);
> -       alarm_tm.tm_year = now_tm.tm_year;
> -       alarm_tm.tm_mon = now_tm.tm_mon;
> -       alarm_tm.tm_mday = now_tm.tm_mday;
> -       alarm_tm.tm_hour = alrm->tm_hour;
> -       alarm_tm.tm_min = alrm->tm_min;
> -       alarm_tm.tm_sec = alrm->tm_sec;
> -       rtc_tm_to_time(&alarm_tm, &time);
> +       rtc_tm_to_time(alrm, &time);
>
>         /* clear all the interrupt status bits */
>         writew(readw(ioaddr + RTC_RTCISR), ioaddr + RTC_RTCISR);
>         set_alarm_or_time(dev, MXC_RTC_ALARM, time);
> -
> -       return 0;
>  }
>
>  static void mxc_rtc_irq_enable(struct device *dev, unsigned int bit,
> @@ -346,11 +335,8 @@ static int mxc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
>  {
>         struct platform_device *pdev = to_platform_device(dev);
>         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
> -       int ret;
>
> -       ret = rtc_update_alarm(dev, &alrm->time);
> -       if (ret)
> -               return ret;
> +       rtc_update_alarm(dev, &alrm->time);
>
>         memcpy(&pdata->g_rtc_alarm, &alrm->time, sizeof(struct rtc_time));
>         mxc_rtc_irq_enable(dev, RTC_ALM_BIT, alrm->enabled);
> --
> 1.9.1
>
>
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