+// SPDX-License-Identifier: GPL-2.0
/*
* RTC subsystem, interface functions
*
* Author: Alessandro Zummo <a.zummo@towertech.it>
*
* based on arch/arm/common/rtctime.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
+ */
#include <linux/rtc.h>
#include <linux/sched.h>
static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)
{
int err;
- if (!rtc->ops)
+
+ if (!rtc->ops) {
err = -ENODEV;
- else if (!rtc->ops->read_time)
+ } else if (!rtc->ops->read_time) {
err = -EINVAL;
- else {
+ } else {
memset(tm, 0, sizeof(struct rtc_time));
err = rtc->ops->read_time(rtc->dev.parent, tm);
if (err < 0) {
err = -ENODEV;
else if (rtc->ops->set_time)
err = rtc->ops->set_time(rtc->dev.parent, tm);
- else if (rtc->ops->set_mmss64) {
- time64_t secs64 = rtc_tm_to_time64(tm);
-
- err = rtc->ops->set_mmss64(rtc->dev.parent, secs64);
- } else if (rtc->ops->set_mmss) {
- time64_t secs64 = rtc_tm_to_time64(tm);
- err = rtc->ops->set_mmss(rtc->dev.parent, secs64);
- } else
+ else
err = -EINVAL;
pm_stay_awake(rtc->dev.parent);
}
EXPORT_SYMBOL_GPL(rtc_set_time);
-static int rtc_read_alarm_internal(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
+static int rtc_read_alarm_internal(struct rtc_device *rtc,
+ struct rtc_wkalrm *alarm)
{
int err;
if (err)
return err;
- if (rtc->ops == NULL)
+ if (!rtc->ops) {
err = -ENODEV;
- else if (!rtc->ops->read_alarm)
+ } else if (!rtc->ops->read_alarm) {
err = -EINVAL;
- else {
+ } else {
alarm->enabled = 0;
alarm->pending = 0;
alarm->time.tm_sec = -1;
int first_time = 1;
time64_t t_now, t_alm;
enum { none, day, month, year } missing = none;
- unsigned days;
+ unsigned int days;
/* The lower level RTC driver may return -1 in some fields,
* creating invalid alarm->time values, for reasons like:
return err;
/* note that tm_sec is a "don't care" value here: */
- } while ( before.tm_min != now.tm_min
- || before.tm_hour != now.tm_hour
- || before.tm_mon != now.tm_mon
- || before.tm_year != now.tm_year);
+ } while (before.tm_min != now.tm_min ||
+ before.tm_hour != now.tm_hour ||
+ before.tm_mon != now.tm_mon ||
+ before.tm_year != now.tm_year);
/* Fill in the missing alarm fields using the timestamp; we
* know there's at least one since alarm->time is invalid.
alarm->time.tm_mday = now.tm_mday;
missing = day;
}
- if ((unsigned)alarm->time.tm_mon >= 12) {
+ if ((unsigned int)alarm->time.tm_mon >= 12) {
alarm->time.tm_mon = now.tm_mon;
if (missing == none)
missing = month;
goto done;
switch (missing) {
-
/* 24 hour rollover ... if it's now 10am Monday, an alarm that
* that will trigger at 5am will do so at 5am Tuesday, which
* could also be in the next month or year. This is a common
case month:
dev_dbg(&rtc->dev, "alarm rollover: %s\n", "month");
do {
- if (alarm->time.tm_mon < 11)
+ if (alarm->time.tm_mon < 11) {
alarm->time.tm_mon++;
- else {
+ } else {
alarm->time.tm_mon = 0;
alarm->time.tm_year++;
}
days = rtc_month_days(alarm->time.tm_mon,
- alarm->time.tm_year);
+ alarm->time.tm_year);
} while (days < alarm->time.tm_mday);
break;
dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");
do {
alarm->time.tm_year++;
- } while (!is_leap_year(alarm->time.tm_year + 1900)
- && rtc_valid_tm(&alarm->time) != 0);
+ } while (!is_leap_year(alarm->time.tm_year + 1900) &&
+ rtc_valid_tm(&alarm->time) != 0);
break;
default:
done:
if (err)
- dev_warn(&rtc->dev, "invalid alarm value: %ptR\n", &alarm->time);
+ dev_warn(&rtc->dev, "invalid alarm value: %ptR\n",
+ &alarm->time);
return err;
}
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
return err;
- if (rtc->ops == NULL)
+ if (!rtc->ops) {
err = -ENODEV;
- else if (!rtc->ops->read_alarm)
+ } else if (!rtc->ops->read_alarm) {
err = -EINVAL;
- else {
+ } else {
memset(alarm, 0, sizeof(struct rtc_wkalrm));
alarm->enabled = rtc->aie_timer.enabled;
alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);
/* Alarm has to be enabled & in the future for us to enqueue it */
if (alarm->enabled && (rtc_tm_to_ktime(now) <
rtc->aie_timer.node.expires)) {
-
rtc->aie_timer.enabled = 1;
timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node);
trace_rtc_timer_enqueue(&rtc->aie_timer);
int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled)
{
- int err = mutex_lock_interruptible(&rtc->ops_lock);
+ int err;
+
+ err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
return err;
int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
{
- int err = mutex_lock_interruptible(&rtc->ops_lock);
+ int err;
+
+ err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
return err;
rtc->uie_rtctimer.node.expires = ktime_add(now, onesec);
rtc->uie_rtctimer.period = ktime_set(1, 0);
err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer);
- } else
+ } else {
rtc_timer_remove(rtc, &rtc->uie_rtctimer);
+ }
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.
+ * Enable emulation if the driver returned -EINVAL to signal that it has
+ * been configured without interrupts or they 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_handle_legacy_irq - AIE, UIE and PIE event hook
* @rtc: pointer to the rtc device
/* mark one irq of the appropriate mode */
spin_lock_irqsave(&rtc->irq_lock, flags);
- rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode);
+ rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF | mode);
spin_unlock_irqrestore(&rtc->irq_lock, flags);
wake_up_interruptible(&rtc->irq_queue);
kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);
}
-
/**
* rtc_aie_update_irq - AIE mode rtctimer hook
* @rtc: pointer to the rtc_device
rtc_handle_legacy_irq(rtc, 1, RTC_AF);
}
-
/**
* rtc_uie_update_irq - UIE mode rtctimer hook
* @rtc: pointer to the rtc_device
rtc_handle_legacy_irq(rtc, 1, RTC_UF);
}
-
/**
* rtc_pie_update_irq - PIE mode hrtimer hook
* @timer: pointer to the pie mode hrtimer
struct rtc_device *rtc;
ktime_t period;
int count;
+
rtc = container_of(timer, struct rtc_device, pie_timer);
period = NSEC_PER_SEC / rtc->irq_freq;
* Context: any
*/
void rtc_update_irq(struct rtc_device *rtc,
- unsigned long num, unsigned long events)
+ unsigned long num, unsigned long events)
{
if (IS_ERR_OR_NULL(rtc))
return;
if (!next || ktime_before(timer->node.expires, next->expires)) {
struct rtc_wkalrm alarm;
int err;
+
alarm.time = rtc_ktime_to_tm(timer->node.expires);
alarm.enabled = 1;
err = __rtc_set_alarm(rtc, &alarm);
static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)
{
struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);
+
timerqueue_del(&rtc->timerqueue, &timer->node);
trace_rtc_timer_dequeue(timer);
timer->enabled = 0;
if (next == &timer->node) {
struct rtc_wkalrm alarm;
int err;
+
next = timerqueue_getnext(&rtc->timerqueue);
if (!next) {
rtc_alarm_disable(rtc);
alarm.enabled = 1;
reprogram:
err = __rtc_set_alarm(rtc, &alarm);
- if (err == -ETIME)
+ if (err == -ETIME) {
goto again;
- else if (err) {
+ } else if (err) {
if (retry-- > 0)
goto reprogram;
dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err);
goto again;
}
- } else
+ } else {
rtc_alarm_disable(rtc);
+ }
pm_relax(rtc->dev.parent);
mutex_unlock(&rtc->ops_lock);
}
-
/* rtc_timer_init - Initializes an rtc_timer
* @timer: timer to be intiialized
* @f: function pointer to be called when timer fires
* Kernel interface to set an rtc_timer
*/
int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer,
- ktime_t expires, ktime_t period)
+ ktime_t expires, ktime_t period)
{
int ret = 0;
+
mutex_lock(&rtc->ops_lock);
if (timer->enabled)
rtc_timer_remove(rtc, timer);
projects / linux-2.6-microblaze.git / blobdiff