diff options
Diffstat (limited to 'drivers/staging/iio/trigger')
| -rw-r--r-- | drivers/staging/iio/trigger/iio-trig-periodic-rtc.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c index 362a54a16e58..b5108a163e37 100644 --- a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c +++ b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c @@ -26,16 +26,22 @@ struct iio_prtc_trigger_info { struct rtc_device *rtc; int frequency; struct rtc_task task; + bool state; }; 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); - if (trig_info->frequency == 0) + int ret; + if (trig_info->frequency == 0 && state) return -EINVAL; dev_dbg(&trig_info->rtc->dev, "trigger frequency is %d\n", trig_info->frequency); - return rtc_irq_set_state(trig_info->rtc, &trig_info->task, state); + ret = rtc_irq_set_state(trig_info->rtc, &trig_info->task, state); + if (ret == 0) + trig_info->state = state; + + return ret; } static ssize_t iio_trig_periodic_read_freq(struct device *dev, @@ -61,7 +67,14 @@ static ssize_t iio_trig_periodic_write_freq(struct device *dev, if (ret) goto error_ret; - ret = rtc_irq_set_freq(trig_info->rtc, &trig_info->task, val); + if (val > 0) { + ret = rtc_irq_set_freq(trig_info->rtc, &trig_info->task, val); + if (ret == 0 && trig_info->state && trig_info->frequency == 0) + ret = rtc_irq_set_state(trig_info->rtc, &trig_info->task, 1); + } else if (val == 0) { + ret = rtc_irq_set_state(trig_info->rtc, &trig_info->task, 0); + } else + ret = -EINVAL; if (ret) goto error_ret; |