From 456d66ecd09e3bc326b93174745faafb6ac378d6 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Fri, 11 Feb 2011 18:15:23 -0800 Subject: RTC: Re-enable UIE timer/polling emulation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch re-enables UIE timer/polling emulation for rtc devices that do not support alarm irqs. CC: Uwe Kleine-König CC: Thomas Gleixner Reported-by: Uwe Kleine-König Tested-by: Uwe Kleine-König Signed-off-by: John Stultz --- drivers/rtc/interface.c | 18 +++++++++++++++++- drivers/rtc/rtc-dev.c | 2 +- 2 files changed, 18 insertions(+), 2 deletions(-) (limited to 'drivers/rtc') diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 413ae0537915..cb2f0728fd70 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -228,6 +228,12 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled) if (err) return err; +#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL + if (enabled == 0 && rtc->uie_irq_active) { + mutex_unlock(&rtc->ops_lock); + return rtc_dev_update_irq_enable_emul(rtc, 0); + } +#endif /* make sure we're changing state */ if (rtc->uie_rtctimer.enabled == enabled) goto out; @@ -247,6 +253,16 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled) out: mutex_unlock(&rtc->ops_lock); +#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL + /* + * Enable emulation if the driver did not provide + * the update_irq_enable function pointer or if returned + * -EINVAL to signal that it has been configured without + * interrupts or that are not available at the moment. + */ + if (err == -EINVAL) + err = rtc_dev_update_irq_enable_emul(rtc, enabled); +#endif return err; } @@ -262,7 +278,7 @@ EXPORT_SYMBOL_GPL(rtc_update_irq_enable); * * Triggers the registered irq_task function callback. */ -static void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode) +void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode) { unsigned long flags; diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index dfa72c9c2687..d0e06edb14c5 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -76,7 +76,7 @@ static void rtc_uie_task(struct work_struct *work) } spin_unlock_irq(&rtc->irq_lock); if (num) - rtc_update_irq(rtc, num, RTC_UF | RTC_IRQF); + rtc_handle_legacy_irq(rtc, num, RTC_UF); } static void rtc_uie_timer(unsigned long data) { -- cgit v1.2.3