diff options
| author |   Jan Kardell <jan.kardell@telliq.com> | 2014-12-10 15:53:46 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-10 17:41:15 -0800 |
| commit | a45d528aab8bcde68476b99403311422c91dc20a (patch) | |
| tree | a571537cb102aa6b803d69fe4ddd4711ac1a4056 /drivers/rtc/rtc-pcf8563.c | |
| parent | rtc: pcf8563: save battery power (diff) | |
| download | linux-dev-a45d528aab8bcde68476b99403311422c91dc20a.tar.xz linux-dev-a45d528aab8bcde68476b99403311422c91dc20a.zip | |
rtc: pcf8563: clear expired alarm at boot time
In case the card is woken up of the rtc alarm, the
devm_rtc_device_register function detects it as a pending alarm about a
month in the future. Fix this by clearing the alarm in module probe.
Signed-off-by: Jan Kardell <jan.kardell@telliq.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Vincent Donnefort <vdonnefort@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/rtc/rtc-pcf8563.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index 1e14f609db34..96fb32e7d6f8 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -396,6 +396,7 @@ static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm) static int pcf8563_irq_enable(struct device *dev, unsigned int enabled) { + dev_dbg(dev, "%s: en=%d\n", __func__, enabled); return pcf8563_set_alarm_mode(to_i2c_client(dev), !!enabled); } @@ -414,6 +415,7 @@ static int pcf8563_probe(struct i2c_client *client, struct pcf8563 *pcf8563; int err; unsigned char buf; + unsigned char alm_pending; dev_dbg(&client->dev, "%s\n", __func__); @@ -439,6 +441,14 @@ static int pcf8563_probe(struct i2c_client *client, return err; } + err = pcf8563_get_alarm_mode(client, NULL, &alm_pending); + if (err < 0) { + dev_err(&client->dev, "%s: read error\n", __func__); + return err; + } + if (alm_pending) + pcf8563_set_alarm_mode(client, 0); + pcf8563->rtc = devm_rtc_device_register(&client->dev, pcf8563_driver.driver.name, &pcf8563_rtc_ops, THIS_MODULE); |