Merge branch 'timer-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timer-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rtc: vt8500: Fix build error & cleanup rtc_class_ops->update_irq_enable() alarmtimers: Return -ENOTSUPP if no RTC device is present alarmtimers: Handle late rtc module loadinghifive-unleashed-5.1
Linus Torvalds
commit
8abf558834
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@ -78,7 +78,6 @@ struct vt8500_rtc {
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void __iomem *regbase;
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struct resource *res;
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int irq_alarm;
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int irq_hz;
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struct rtc_device *rtc;
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spinlock_t lock; /* Protects this structure */
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};
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@ -100,10 +99,6 @@ static irqreturn_t vt8500_rtc_irq(int irq, void *dev_id)
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if (isr & 1)
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events |= RTC_AF | RTC_IRQF;
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/* Only second/minute interrupts are supported */
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if (isr & 2)
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events |= RTC_UF | RTC_IRQF;
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rtc_update_irq(vt8500_rtc->rtc, 1, events);
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return IRQ_HANDLED;
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@ -199,27 +194,12 @@ static int vt8500_alarm_irq_enable(struct device *dev, unsigned int enabled)
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return 0;
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}
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static int vt8500_update_irq_enable(struct device *dev, unsigned int enabled)
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{
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struct vt8500_rtc *vt8500_rtc = dev_get_drvdata(dev);
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unsigned long tmp = readl(vt8500_rtc->regbase + VT8500_RTC_CR);
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if (enabled)
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tmp |= VT8500_RTC_CR_SM_SEC | VT8500_RTC_CR_SM_ENABLE;
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else
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tmp &= ~VT8500_RTC_CR_SM_ENABLE;
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writel(tmp, vt8500_rtc->regbase + VT8500_RTC_CR);
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return 0;
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}
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static const struct rtc_class_ops vt8500_rtc_ops = {
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.read_time = vt8500_rtc_read_time,
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.set_time = vt8500_rtc_set_time,
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.read_alarm = vt8500_rtc_read_alarm,
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.set_alarm = vt8500_rtc_set_alarm,
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.alarm_irq_enable = vt8500_alarm_irq_enable,
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.update_irq_enable = vt8500_update_irq_enable,
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};
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static int __devinit vt8500_rtc_probe(struct platform_device *pdev)
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@ -248,13 +228,6 @@ static int __devinit vt8500_rtc_probe(struct platform_device *pdev)
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goto err_free;
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}
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vt8500_rtc->irq_hz = platform_get_irq(pdev, 1);
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if (vt8500_rtc->irq_hz < 0) {
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dev_err(&pdev->dev, "No 1Hz IRQ resource defined\n");
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ret = -ENXIO;
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goto err_free;
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}
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vt8500_rtc->res = request_mem_region(vt8500_rtc->res->start,
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resource_size(vt8500_rtc->res),
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"vt8500-rtc");
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@ -272,9 +245,8 @@ static int __devinit vt8500_rtc_probe(struct platform_device *pdev)
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goto err_release;
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}
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/* Enable the second/minute interrupt generation and enable RTC */
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writel(VT8500_RTC_CR_ENABLE | VT8500_RTC_CR_24H
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| VT8500_RTC_CR_SM_ENABLE | VT8500_RTC_CR_SM_SEC,
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/* Enable RTC and set it to 24-hour mode */
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writel(VT8500_RTC_CR_ENABLE | VT8500_RTC_CR_24H,
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vt8500_rtc->regbase + VT8500_RTC_CR);
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vt8500_rtc->rtc = rtc_device_register("vt8500-rtc", &pdev->dev,
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@ -286,26 +258,16 @@ static int __devinit vt8500_rtc_probe(struct platform_device *pdev)
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goto err_unmap;
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}
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ret = request_irq(vt8500_rtc->irq_hz, vt8500_rtc_irq, 0,
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"rtc 1Hz", vt8500_rtc);
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if (ret < 0) {
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dev_err(&pdev->dev, "can't get irq %i, err %d\n",
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vt8500_rtc->irq_hz, ret);
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goto err_unreg;
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}
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ret = request_irq(vt8500_rtc->irq_alarm, vt8500_rtc_irq, 0,
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"rtc alarm", vt8500_rtc);
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if (ret < 0) {
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dev_err(&pdev->dev, "can't get irq %i, err %d\n",
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vt8500_rtc->irq_alarm, ret);
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goto err_free_hz;
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goto err_unreg;
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}
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return 0;
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err_free_hz:
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free_irq(vt8500_rtc->irq_hz, vt8500_rtc);
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err_unreg:
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rtc_device_unregister(vt8500_rtc->rtc);
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err_unmap:
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@ -323,7 +285,6 @@ static int __devexit vt8500_rtc_remove(struct platform_device *pdev)
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struct vt8500_rtc *vt8500_rtc = platform_get_drvdata(pdev);
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free_irq(vt8500_rtc->irq_alarm, vt8500_rtc);
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free_irq(vt8500_rtc->irq_hz, vt8500_rtc);
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rtc_device_unregister(vt8500_rtc->rtc);
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@ -42,15 +42,75 @@ static struct alarm_base {
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clockid_t base_clockid;
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} alarm_bases[ALARM_NUMTYPE];
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/* freezer delta & lock used to handle clock_nanosleep triggered wakeups */
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static ktime_t freezer_delta;
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static DEFINE_SPINLOCK(freezer_delta_lock);
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#ifdef CONFIG_RTC_CLASS
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/* rtc timer and device for setting alarm wakeups at suspend */
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static struct rtc_timer rtctimer;
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static struct rtc_device *rtcdev;
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#endif
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static DEFINE_SPINLOCK(rtcdev_lock);
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/* freezer delta & lock used to handle clock_nanosleep triggered wakeups */
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static ktime_t freezer_delta;
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static DEFINE_SPINLOCK(freezer_delta_lock);
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/**
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* has_wakealarm - check rtc device has wakealarm ability
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* @dev: current device
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* @name_ptr: name to be returned
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*
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* This helper function checks to see if the rtc device can wake
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* from suspend.
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*/
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static int has_wakealarm(struct device *dev, void *name_ptr)
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{
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struct rtc_device *candidate = to_rtc_device(dev);
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if (!candidate->ops->set_alarm)
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return 0;
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if (!device_may_wakeup(candidate->dev.parent))
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return 0;
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*(const char **)name_ptr = dev_name(dev);
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return 1;
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}
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/**
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* alarmtimer_get_rtcdev - Return selected rtcdevice
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*
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* This function returns the rtc device to use for wakealarms.
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* If one has not already been chosen, it checks to see if a
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* functional rtc device is available.
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*/
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static struct rtc_device *alarmtimer_get_rtcdev(void)
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{
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struct device *dev;
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char *str;
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unsigned long flags;
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struct rtc_device *ret;
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spin_lock_irqsave(&rtcdev_lock, flags);
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if (!rtcdev) {
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/* Find an rtc device and init the rtc_timer */
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dev = class_find_device(rtc_class, NULL, &str, has_wakealarm);
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/* If we have a device then str is valid. See has_wakealarm() */
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if (dev) {
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rtcdev = rtc_class_open(str);
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/*
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* Drop the reference we got in class_find_device,
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* rtc_open takes its own.
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*/
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put_device(dev);
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rtc_timer_init(&rtctimer, NULL, NULL);
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}
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}
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ret = rtcdev;
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spin_unlock_irqrestore(&rtcdev_lock, flags);
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return ret;
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}
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#else
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#define alarmtimer_get_rtcdev() (0)
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#define rtcdev (0)
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#endif
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/**
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@ -166,6 +226,7 @@ static int alarmtimer_suspend(struct device *dev)
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struct rtc_time tm;
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ktime_t min, now;
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unsigned long flags;
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struct rtc_device *rtc;
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int i;
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spin_lock_irqsave(&freezer_delta_lock, flags);
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@ -173,8 +234,9 @@ static int alarmtimer_suspend(struct device *dev)
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freezer_delta = ktime_set(0, 0);
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spin_unlock_irqrestore(&freezer_delta_lock, flags);
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rtc = rtcdev;
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/* If we have no rtcdev, just return */
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if (!rtcdev)
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if (!rtc)
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return 0;
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/* Find the soonest timer to expire*/
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@ -199,12 +261,12 @@ static int alarmtimer_suspend(struct device *dev)
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WARN_ON(min.tv64 < NSEC_PER_SEC);
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/* Setup an rtc timer to fire that far in the future */
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rtc_timer_cancel(rtcdev, &rtctimer);
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rtc_read_time(rtcdev, &tm);
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rtc_timer_cancel(rtc, &rtctimer);
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rtc_read_time(rtc, &tm);
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now = rtc_tm_to_ktime(tm);
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now = ktime_add(now, min);
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rtc_timer_start(rtcdev, &rtctimer, now, ktime_set(0, 0));
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rtc_timer_start(rtc, &rtctimer, now, ktime_set(0, 0));
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return 0;
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}
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@ -322,6 +384,9 @@ static int alarm_clock_getres(const clockid_t which_clock, struct timespec *tp)
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{
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clockid_t baseid = alarm_bases[clock2alarm(which_clock)].base_clockid;
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if (!alarmtimer_get_rtcdev())
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return -ENOTSUPP;
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return hrtimer_get_res(baseid, tp);
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}
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@ -336,6 +401,9 @@ static int alarm_clock_get(clockid_t which_clock, struct timespec *tp)
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{
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struct alarm_base *base = &alarm_bases[clock2alarm(which_clock)];
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if (!alarmtimer_get_rtcdev())
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return -ENOTSUPP;
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*tp = ktime_to_timespec(base->gettime());
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return 0;
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}
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@ -351,6 +419,9 @@ static int alarm_timer_create(struct k_itimer *new_timer)
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enum alarmtimer_type type;
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struct alarm_base *base;
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if (!alarmtimer_get_rtcdev())
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return -ENOTSUPP;
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if (!capable(CAP_WAKE_ALARM))
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return -EPERM;
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@ -385,6 +456,9 @@ static void alarm_timer_get(struct k_itimer *timr,
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*/
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static int alarm_timer_del(struct k_itimer *timr)
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{
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if (!rtcdev)
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return -ENOTSUPP;
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alarm_cancel(&timr->it.alarmtimer);
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return 0;
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}
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@ -402,6 +476,9 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
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struct itimerspec *new_setting,
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struct itimerspec *old_setting)
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{
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if (!rtcdev)
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return -ENOTSUPP;
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/* Save old values */
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old_setting->it_interval =
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ktime_to_timespec(timr->it.alarmtimer.period);
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@ -541,6 +618,9 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags,
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int ret = 0;
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struct restart_block *restart;
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if (!alarmtimer_get_rtcdev())
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return -ENOTSUPP;
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if (!capable(CAP_WAKE_ALARM))
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return -EPERM;
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@ -638,65 +718,3 @@ static int __init alarmtimer_init(void)
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}
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device_initcall(alarmtimer_init);
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#ifdef CONFIG_RTC_CLASS
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/**
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* has_wakealarm - check rtc device has wakealarm ability
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* @dev: current device
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* @name_ptr: name to be returned
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*
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* This helper function checks to see if the rtc device can wake
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* from suspend.
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*/
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static int __init has_wakealarm(struct device *dev, void *name_ptr)
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{
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struct rtc_device *candidate = to_rtc_device(dev);
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if (!candidate->ops->set_alarm)
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return 0;
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if (!device_may_wakeup(candidate->dev.parent))
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return 0;
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*(const char **)name_ptr = dev_name(dev);
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return 1;
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}
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/**
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* alarmtimer_init_late - Late initializing of alarmtimer code
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*
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* This function locates a rtc device to use for wakealarms.
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* Run as late_initcall to make sure rtc devices have been
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* registered.
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*/
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static int __init alarmtimer_init_late(void)
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{
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struct device *dev;
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char *str;
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/* Find an rtc device and init the rtc_timer */
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dev = class_find_device(rtc_class, NULL, &str, has_wakealarm);
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/* If we have a device then str is valid. See has_wakealarm() */
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if (dev) {
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rtcdev = rtc_class_open(str);
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/*
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* Drop the reference we got in class_find_device,
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* rtc_open takes its own.
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*/
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put_device(dev);
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}
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if (!rtcdev) {
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printk(KERN_WARNING "No RTC device found, ALARM timers will"
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" not wake from suspend");
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}
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rtc_timer_init(&rtctimer, NULL, NULL);
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return 0;
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}
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#else
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static int __init alarmtimer_init_late(void)
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{
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printk(KERN_WARNING "Kernel not built with RTC support, ALARM timers"
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" will not wake from suspend");
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return 0;
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}
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#endif
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late_initcall(alarmtimer_init_late);
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