Commit-ID: a015b8aabfd2fb58875dea001f1eac8100eacc2e Gitweb: http://git.kernel.org/tip/a015b8aabfd2fb58875dea001f1eac8100eacc2e Author: Xunlei Pang <pang.xun...@linaro.org> AuthorDate: Wed, 1 Apr 2015 20:34:32 -0700 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Fri, 3 Apr 2015 08:18:28 +0200
drivers/rtc/mxc: Convert get_alarm_or_time()/set_alarm_or_time() to use time64_t We want to convert mxc_rtc_set_mmss() to use rtc_class_ops's set_mmss64(), but it uses get_alarm_or_time()/set_alarm_or_time() internal interfaces which are y2038 unsafe. So here as a separate patch, it converts these two internal interfaces of "mxc" to use safe time64_t to make some preparations. Signed-off-by: Xunlei Pang <pang.xun...@linaro.org> Signed-off-by: John Stultz <john.stu...@linaro.org> Acked-by: Alessandro Zummo <a.zu...@towertech.it> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/1427945681-29972-13-git-send-email-john.stu...@linaro.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- drivers/rtc/rtc-mxc.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c index a7b218f..83cba23 100644 --- a/drivers/rtc/rtc-mxc.c +++ b/drivers/rtc/rtc-mxc.c @@ -106,7 +106,7 @@ static inline int is_imx1_rtc(struct rtc_plat_data *data) * This function is used to obtain the RTC time or the alarm value in * second. */ -static u32 get_alarm_or_time(struct device *dev, int time_alarm) +static time64_t get_alarm_or_time(struct device *dev, int time_alarm) { struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); @@ -129,29 +129,28 @@ static u32 get_alarm_or_time(struct device *dev, int time_alarm) hr = hr_min >> 8; min = hr_min & 0xff; - return (((day * 24 + hr) * 60) + min) * 60 + sec; + return ((((time64_t)day * 24 + hr) * 60) + min) * 60 + sec; } /* * This function sets the RTC alarm value or the time value. */ -static void set_alarm_or_time(struct device *dev, int time_alarm, u32 time) +static void set_alarm_or_time(struct device *dev, int time_alarm, time64_t time) { - u32 day, hr, min, sec, temp; + u32 tod, day, hr, min, sec, temp; struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; - day = time / 86400; - time -= day * 86400; + day = div_s64_rem(time, 86400, &tod); /* time is within a day now */ - hr = time / 3600; - time -= hr * 3600; + hr = tod / 3600; + tod -= hr * 3600; /* time is within an hour now */ - min = time / 60; - sec = time - min * 60; + min = tod / 60; + sec = tod - min * 60; temp = (hr << 8) + min; @@ -175,12 +174,12 @@ static void set_alarm_or_time(struct device *dev, int time_alarm, u32 time) */ static void rtc_update_alarm(struct device *dev, struct rtc_time *alrm) { - unsigned long time; + time64_t time; struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; - rtc_tm_to_time(alrm, &time); + time = rtc_tm_to_time64(alrm); /* clear all the interrupt status bits */ writew(readw(ioaddr + RTC_RTCISR), ioaddr + RTC_RTCISR); @@ -272,14 +271,14 @@ static int mxc_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) */ static int mxc_rtc_read_time(struct device *dev, struct rtc_time *tm) { - u32 val; + time64_t val; /* Avoid roll-over from reading the different registers */ do { val = get_alarm_or_time(dev, MXC_RTC_TIME); } while (val != get_alarm_or_time(dev, MXC_RTC_TIME)); - rtc_time_to_tm(val, tm); + rtc_time64_to_tm(val, tm); return 0; } @@ -322,7 +321,7 @@ static int mxc_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; - rtc_time_to_tm(get_alarm_or_time(dev, MXC_RTC_ALARM), &alrm->time); + rtc_time64_to_tm(get_alarm_or_time(dev, MXC_RTC_ALARM), &alrm->time); alrm->pending = ((readw(ioaddr + RTC_RTCISR) & RTC_ALM_BIT)) ? 1 : 0; return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
