The patch titled rtc: add alarm/update irq interfaces has been added to the -mm tree. Its filename is rtc-add-alarm-update-irq-interfaces-version-5.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: rtc: add alarm/update irq interfaces From: Alessandro Zummo <a.zummo@xxxxxxxxxxxx> Add standard interfaces for alarm/update irqs enabling. Drivers are no more required to implement equivalent ioctl code as rtc-dev will provide it. UIE emulation should now be handled correctly and will work even for those RTC drivers who cannot be configured to do both UIE and AIE. Signed-off-by: Alessandro Zummo <a.zummo@xxxxxxxxxxxx> Cc: David Brownell <david-b@xxxxxxxxxxx> Cc: Atsushi Nemoto <anemo@xxxxxxxxxxxxx> Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/rtc/Kconfig | 6 +++- drivers/rtc/interface.c | 54 ++++++++++++++++++++++++++++++++++++++ drivers/rtc/rtc-dev.c | 51 ++++++++++++++++++++++++----------- include/linux/rtc.h | 8 ++++- 4 files changed, 101 insertions(+), 18 deletions(-) diff -puN drivers/rtc/Kconfig~rtc-add-alarm-update-irq-interfaces-version-5 drivers/rtc/Kconfig --- a/drivers/rtc/Kconfig~rtc-add-alarm-update-irq-interfaces-version-5 +++ a/drivers/rtc/Kconfig @@ -102,9 +102,13 @@ config RTC_INTF_DEV_UIE_EMUL depends on RTC_INTF_DEV help Provides an emulation for RTC_UIE if the underlying rtc chip - driver does not expose RTC_UIE ioctls. Those requests generate + driver does not expose RTC_UIE ioctls. Those requests generate once-per-second update interrupts, used for synchronization. + The emulation code will read the time from the hardware + clock several times per second, please enable this option + only if you know that you really need it. + config RTC_DRV_TEST tristate "Test driver/device" help diff -puN drivers/rtc/interface.c~rtc-add-alarm-update-irq-interfaces-version-5 drivers/rtc/interface.c --- a/drivers/rtc/interface.c~rtc-add-alarm-update-irq-interfaces-version-5 +++ a/drivers/rtc/interface.c @@ -307,6 +307,60 @@ int rtc_set_alarm(struct rtc_device *rtc } EXPORT_SYMBOL_GPL(rtc_set_alarm); +int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled) +{ + int err = mutex_lock_interruptible(&rtc->ops_lock); + if (err) + return err; + + if (!rtc->ops) + err = -ENODEV; + else if (!rtc->ops->alarm_irq_enable) + err = -EINVAL; + else + err = rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled); + + mutex_unlock(&rtc->ops_lock); + return err; +} +EXPORT_SYMBOL_GPL(rtc_alarm_irq_enable); + +int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled) +{ + int err = mutex_lock_interruptible(&rtc->ops_lock); + 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, enabled); + } +#endif + + if (!rtc->ops) + err = -ENODEV; + else if (!rtc->ops->update_irq_enable) + err = -EINVAL; + else + err = rtc->ops->update_irq_enable(rtc->dev.parent, enabled); + + 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; +} +EXPORT_SYMBOL_GPL(rtc_update_irq_enable); + /** * rtc_update_irq - report RTC periodic, alarm, and/or update irqs * @rtc: the rtc device diff -puN drivers/rtc/rtc-dev.c~rtc-add-alarm-update-irq-interfaces-version-5 drivers/rtc/rtc-dev.c --- a/drivers/rtc/rtc-dev.c~rtc-add-alarm-update-irq-interfaces-version-5 +++ a/drivers/rtc/rtc-dev.c @@ -92,10 +92,10 @@ static void rtc_uie_timer(unsigned long spin_unlock_irqrestore(&rtc->irq_lock, flags); } -static void clear_uie(struct rtc_device *rtc) +static int clear_uie(struct rtc_device *rtc) { spin_lock_irq(&rtc->irq_lock); - if (rtc->irq_active) { + if (rtc->uie_irq_active) { rtc->stop_uie_polling = 1; if (rtc->uie_timer_active) { spin_unlock_irq(&rtc->irq_lock); @@ -108,9 +108,10 @@ static void clear_uie(struct rtc_device flush_scheduled_work(); spin_lock_irq(&rtc->irq_lock); } - rtc->irq_active = 0; + rtc->uie_irq_active = 0; } spin_unlock_irq(&rtc->irq_lock); + return 0; } static int set_uie(struct rtc_device *rtc) @@ -122,8 +123,8 @@ static int set_uie(struct rtc_device *rt if (err) return err; spin_lock_irq(&rtc->irq_lock); - if (!rtc->irq_active) { - rtc->irq_active = 1; + if (!rtc->uie_irq_active) { + rtc->uie_irq_active = 1; rtc->stop_uie_polling = 0; rtc->oldsecs = tm.tm_sec; rtc->uie_task_active = 1; @@ -134,6 +135,16 @@ static int set_uie(struct rtc_device *rt spin_unlock_irq(&rtc->irq_lock); return 0; } + +int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, unsigned int enabled) +{ + if (enabled) + return set_uie(rtc); + else + return clear_uie(rtc); +} +EXPORT_SYMBOL(rtc_dev_update_irq_enable_emul); + #endif /* CONFIG_RTC_INTF_DEV_UIE_EMUL */ static ssize_t @@ -357,6 +368,22 @@ static long rtc_dev_ioctl(struct file *f err = rtc_irq_set_state(rtc, NULL, 0); break; + case RTC_AIE_ON: + mutex_unlock(&rtc->ops_lock); + return rtc_alarm_irq_enable(rtc, 1); + + case RTC_AIE_OFF: + mutex_unlock(&rtc->ops_lock); + return rtc_alarm_irq_enable(rtc, 0); + + case RTC_UIE_ON: + mutex_unlock(&rtc->ops_lock); + return rtc_update_irq_enable(rtc, 1); + + case RTC_UIE_OFF: + mutex_unlock(&rtc->ops_lock); + return rtc_update_irq_enable(rtc, 0); + case RTC_IRQP_SET: err = rtc_irq_set_freq(rtc, NULL, arg); break; @@ -401,17 +428,6 @@ static long rtc_dev_ioctl(struct file *f err = -EFAULT; return err; -#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL - case RTC_UIE_OFF: - mutex_unlock(&rtc->ops_lock); - clear_uie(rtc); - return 0; - - case RTC_UIE_ON: - mutex_unlock(&rtc->ops_lock); - err = set_uie(rtc); - return err; -#endif default: err = -ENOTTY; break; @@ -440,7 +456,10 @@ static int rtc_dev_release(struct inode * Leave the alarm alone; it may be set to trigger a system wakeup * later, or be used by kernel code, and is a one-shot event anyway. */ + + /* Keep ioctl until all drivers are converted */ rtc_dev_ioctl(file, RTC_UIE_OFF, 0); + rtc_update_irq_enable(rtc, 0); rtc_irq_set_state(rtc, NULL, 0); if (rtc->ops->release) diff -puN include/linux/rtc.h~rtc-add-alarm-update-irq-interfaces-version-5 include/linux/rtc.h --- a/include/linux/rtc.h~rtc-add-alarm-update-irq-interfaces-version-5 +++ a/include/linux/rtc.h @@ -145,6 +145,8 @@ struct rtc_class_ops { int (*irq_set_state)(struct device *, int enabled); int (*irq_set_freq)(struct device *, int freq); int (*read_callback)(struct device *, int data); + int (*alarm_irq_enable)(struct device *, unsigned int enabled); + int (*update_irq_enable)(struct device *, unsigned int enabled); }; #define RTC_DEVICE_NAME_SIZE 20 @@ -181,7 +183,7 @@ struct rtc_device struct timer_list uie_timer; /* Those fields are protected by rtc->irq_lock */ unsigned int oldsecs; - unsigned int irq_active:1; + unsigned int uie_irq_active:1; unsigned int stop_uie_polling:1; unsigned int uie_task_active:1; unsigned int uie_timer_active:1; @@ -216,6 +218,10 @@ extern int rtc_irq_set_state(struct rtc_ struct rtc_task *task, int enabled); extern int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq); +extern int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled); +extern int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled); +extern int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, + unsigned int enabled); typedef struct rtc_task { void (*func)(void *private_data); _ Patches currently in -mm which might be from a.zummo@xxxxxxxxxxxx are origin.patch genrtc-disable-genrtc-on-blackfin-systems.patch rtc-ds1307-smbus-compatibility.patch rtc-ds1307-remove-legacy-probe-checks.patch rtc-struct-device-replace-bus_id-with-dev_name-dev_set_name.patch rtc-bunch-of-drivers-fix-no-irq-case-handing.patch rtc-move-power-of-2-periodic-frequency-check-down-into-drivers-v2.patch rtc-driver-for-pxa27x-and-pxa3xx-soc.patch rtc-pxa27x-pxa3xx-driver-fixes-revised.patch rtc-add-alarm-update-irq-interfaces-version-5.patch rtc-rtc-ds1390-probe-sequence-and-misc-fixes.patch rtc-kconfig-cleanup.patch rtc-au1000-on-chip-counter0-as-rtc-driver.patch rtc-au1000-on-chip-counter0-as-rtc-driver-fix.patch rtc-rtc-max6902-fixes-v3.patch rtc-rtc-ds3234-fixes-v2.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html