diff options
Diffstat (limited to 'drivers/staging/iio/trigger/iio-trig-periodic-rtc.c')
| -rw-r--r-- | drivers/staging/iio/trigger/iio-trig-periodic-rtc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c index b1aeb88273c9..8f0a2ffa7150 100644 --- a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c +++ b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c @@ -33,6 +33,7 @@ static int iio_trig_periodic_rtc_set_state(struct iio_trigger *trig, bool state) { struct iio_prtc_trigger_info *trig_info = iio_trigger_get_drvdata(trig); int ret; + if (trig_info->frequency == 0 && state) return -EINVAL; dev_dbg(&trig_info->rtc->dev, "trigger frequency is %d\n", @@ -50,6 +51,7 @@ static ssize_t iio_trig_periodic_read_freq(struct device *dev, { struct iio_trigger *trig = to_iio_trigger(dev); struct iio_prtc_trigger_info *trig_info = iio_trigger_get_drvdata(trig); + return sprintf(buf, "%u\n", trig_info->frequency); } @@ -183,6 +185,7 @@ static int iio_trig_periodic_rtc_remove(struct platform_device *dev) { struct iio_trigger *trig, *trig2; struct iio_prtc_trigger_info *trig_info; + mutex_lock(&iio_prtc_trigger_list_lock); list_for_each_entry_safe(trig, trig2, |