diff options
| -rw-r--r-- | drivers/staging/iio/iio.h | 7 | ||||
| -rw-r--r-- | drivers/staging/iio/industrialio-trigger.c | 20 | ||||
| -rw-r--r-- | drivers/staging/iio/trigger.h | 4 |
3 files changed, 30 insertions, 1 deletions
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h index 78a0927..6e51baa 100644 --- a/drivers/staging/iio/iio.h +++ b/drivers/staging/iio/iio.h @@ -204,6 +204,8 @@ static inline s64 iio_get_time_ns(void) #define IIO_VAL_INT_PLUS_MICRO 2 #define IIO_VAL_INT_PLUS_NANO 3 +struct iio_trigger; /* forward declaration */ + /** * struct iio_info - constant information about device * @driver_module: module structure used to ensure correct @@ -224,6 +226,8 @@ static inline s64 iio_get_time_ns(void) * is event dependant. event_code specifies which event. * @write_event_value: write the value associate with the event. * Meaning is event dependent. + * @validate_trigger: function to validate the trigger when the + * current trigger gets changed. **/ struct iio_info { struct module *driver_module; @@ -256,6 +260,9 @@ struct iio_info { int (*write_event_value)(struct iio_dev *indio_dev, int event_code, int val); + int (*validate_trigger)(struct iio_dev *indio_dev, + struct iio_trigger *trig); + }; /** diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c index d504aa2..90ca2df 100644 --- a/drivers/staging/iio/industrialio-trigger.c +++ b/drivers/staging/iio/industrialio-trigger.c @@ -340,6 +340,9 @@ static ssize_t iio_trigger_write_current(struct device *dev, { struct iio_dev *dev_info = dev_get_drvdata(dev); struct iio_trigger *oldtrig = dev_info->trig; + struct iio_trigger *trig; + int ret; + mutex_lock(&dev_info->mlock); if (dev_info->currentmode == INDIO_RING_TRIGGERED) { mutex_unlock(&dev_info->mlock); @@ -347,7 +350,22 @@ static ssize_t iio_trigger_write_current(struct device *dev, } mutex_unlock(&dev_info->mlock); - dev_info->trig = iio_trigger_find_by_name(buf, len); + trig = iio_trigger_find_by_name(buf, len); + + if (trig && dev_info->info->validate_trigger) { + ret = dev_info->info->validate_trigger(dev_info, trig); + if (ret) + return ret; + } + + if (trig && trig->validate_device) { + ret = trig->validate_device(trig, dev_info); + if (ret) + return ret; + } + + dev_info->trig = trig; + if (oldtrig && dev_info->trig != oldtrig) iio_put_trigger(oldtrig); if (dev_info->trig) diff --git a/drivers/staging/iio/trigger.h b/drivers/staging/iio/trigger.h index 7ddaabb..e0b58ed 100644 --- a/drivers/staging/iio/trigger.h +++ b/drivers/staging/iio/trigger.h @@ -29,6 +29,8 @@ struct iio_subirq { * @set_trigger_state: [DRIVER] switch on/off the trigger on demand * @try_reenable: function to reenable the trigger when the * use count is zero (may be NULL) + * @validate_device: function to validate the device when the + * current trigger gets changed. * @subirq_chip: [INTERN] associate 'virtual' irq chip. * @subirq_base: [INTERN] base number for irqs provided by trigger. * @subirqs: [INTERN] information about the 'child' irqs. @@ -48,6 +50,8 @@ struct iio_trigger { int (*set_trigger_state)(struct iio_trigger *trig, bool state); int (*try_reenable)(struct iio_trigger *trig); + int (*validate_device)(struct iio_trigger *trig, + struct iio_dev *indio_dev); struct irq_chip subirq_chip; int subirq_base; |
