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rtc: test: emulate alarms using timers

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Use timers to emulate alarms. Note that multiple alarms may happen if they
are set more than 15 days after the current RTC time.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2018-05-31 23:09:58 +02:00
parent 4dc2403bed
commit 8be0902994
1 changed files with 52 additions and 4 deletions
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56
drivers/rtc/rtc-test.c
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@ -18,19 +18,49 @@
struct rtc_test_data {
struct rtc_device *rtc;
time64_t offset;
struct timer_list alarm;
bool alarm_en;
};
struct platform_device *pdev[MAX_RTC_TEST];
static int test_rtc_read_alarm(struct device *dev,
struct rtc_wkalrm *alrm)
static int test_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rtc_test_data *rtd = dev_get_drvdata(dev);
time64_t alarm;
alarm = (rtd->alarm.expires - jiffies) / HZ;
alarm += ktime_get_real_seconds() + rtd->offset;
rtc_time64_to_tm(alarm, &alrm->time);
alrm->enabled = rtd->alarm_en;
return 0;
}
static int test_rtc_set_alarm(struct device *dev,
struct rtc_wkalrm *alrm)
static int test_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rtc_test_data *rtd = dev_get_drvdata(dev);
ktime_t timeout;
u64 expires;
timeout = rtc_tm_to_time64(&alrm->time) - ktime_get_real_seconds();
timeout -= rtd->offset;
del_timer(&rtd->alarm);
expires = jiffies + timeout * HZ;
if (expires > U32_MAX)
expires = U32_MAX;
pr_err("ABE: %s +%d %s\n", __FILE__, __LINE__, __func__);
rtd->alarm.expires = expires;
if (alrm->enabled)
add_timer(&rtd->alarm);
rtd->alarm_en = alrm->enabled;
return 0;
}
@ -54,6 +84,14 @@ static int test_rtc_set_mmss64(struct device *dev, time64_t secs)
static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
{
struct rtc_test_data *rtd = dev_get_drvdata(dev);
rtd->alarm_en = enable;
if (enable)
add_timer(&rtd->alarm);
else
del_timer(&rtd->alarm);
return 0;
}
@ -65,6 +103,13 @@ static const struct rtc_class_ops test_rtc_ops = {
.alarm_irq_enable = test_rtc_alarm_irq_enable,
};
static void test_rtc_alarm_handler(struct timer_list *t)
{
struct rtc_test_data *rtd = from_timer(rtd, t, alarm);
rtc_update_irq(rtd->rtc, 1, RTC_AF | RTC_IRQF);
}
static ssize_t test_irq_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -111,6 +156,9 @@ static int test_probe(struct platform_device *plat_dev)
if (IS_ERR(rtd->rtc))
return PTR_ERR(rtd->rtc);
timer_setup(&rtd->alarm, test_rtc_alarm_handler, 0);
rtd->alarm.expires = 0;
return 0;
}