diff options
author | Octavian Purdila <octavian.purdila@intel.com> | 2015-03-03 18:17:58 +0200 |
---|---|---|
committer | Jonathan Cameron <jic23@kernel.org> | 2015-03-14 18:56:16 +0000 |
commit | 7d963215f6bedd268fa26aadd4ca4270e1076566 (patch) | |
tree | 7c44d7240ae6f1a13c4fdcdd3aa0460be99e7dbf /drivers/iio | |
parent | 3e825ec98d36c8c8073024c95853389a831902e5 (diff) | |
download | op-kernel-dev-7d963215f6bedd268fa26aadd4ca4270e1076566.zip op-kernel-dev-7d963215f6bedd268fa26aadd4ca4270e1076566.tar.gz |
iio: bmc150: introduce bmc150_accel_trigger
Add a separate structure for triggers and add the infrastructure to
support an arbitrary number of triggers. Each trigger is associated
with an interrupt and has an enabled/disabled state.
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r-- | drivers/iio/accel/bmc150-accel.c | 204 |
1 files changed, 125 insertions, 79 deletions
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c index db95237..f1b80c4 100644 --- a/drivers/iio/accel/bmc150-accel.c +++ b/drivers/iio/accel/bmc150-accel.c @@ -152,6 +152,14 @@ struct bmc150_accel_interrupt { atomic_t users; }; +struct bmc150_accel_trigger { + struct bmc150_accel_data *data; + struct iio_trigger *indio_trig; + int (*setup)(struct bmc150_accel_trigger *t, bool state); + int intr; + bool enabled; +}; + enum bmc150_accel_interrupt_id { BMC150_ACCEL_INT_DATA_READY, BMC150_ACCEL_INT_ANY_MOTION, @@ -159,12 +167,17 @@ enum bmc150_accel_interrupt_id { BMC150_ACCEL_INTERRUPTS, }; +enum bmc150_accel_trigger_id { + BMC150_ACCEL_TRIGGER_DATA_READY, + BMC150_ACCEL_TRIGGER_ANY_MOTION, + BMC150_ACCEL_TRIGGERS, +}; + struct bmc150_accel_data { struct i2c_client *client; struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS]; - struct iio_trigger *dready_trig; - struct iio_trigger *motion_trig; atomic_t active_intr; + struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS]; struct mutex mutex; s16 buffer[8]; u8 bw_bits; @@ -172,8 +185,6 @@ struct bmc150_accel_data { u32 slope_thres; u32 range; int ev_enable_state; - bool dready_trigger_on; - bool motion_trigger_on; int64_t timestamp; const struct bmc150_accel_chip_info *chip_info; }; @@ -314,6 +325,15 @@ static int bmc150_accel_update_slope(struct bmc150_accel_data *data) return ret; } +static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t, + bool state) +{ + if (state) + return bmc150_accel_update_slope(t->data); + + return 0; +} + static int bmc150_accel_chip_init(struct bmc150_accel_data *data) { int ret; @@ -793,11 +813,14 @@ static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig) { struct bmc150_accel_data *data = iio_priv(indio_dev); + int i; - if (data->dready_trig != trig && data->motion_trig != trig) - return -EINVAL; + for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { + if (data->triggers[i].indio_trig == trig) + return 0; + } - return 0; + return -EINVAL; } static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( @@ -969,12 +992,12 @@ err_read: static int bmc150_accel_trig_try_reen(struct iio_trigger *trig) { - struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); - struct bmc150_accel_data *data = iio_priv(indio_dev); + struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); + struct bmc150_accel_data *data = t->data; int ret; /* new data interrupts don't need ack */ - if (data->dready_trigger_on) + if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY]) return 0; mutex_lock(&data->mutex); @@ -993,46 +1016,35 @@ static int bmc150_accel_trig_try_reen(struct iio_trigger *trig) return 0; } -static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig, +static int bmc150_accel_trigger_set_state(struct iio_trigger *trig, bool state) { - struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); - struct bmc150_accel_data *data = iio_priv(indio_dev); + struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); + struct bmc150_accel_data *data = t->data; int ret; mutex_lock(&data->mutex); - if (data->motion_trig == trig) { - if (data->motion_trigger_on == state) { - mutex_unlock(&data->mutex); - return 0; - } - } else { - if (data->dready_trigger_on == state) { + if (t->enabled == state) { + mutex_unlock(&data->mutex); + return 0; + } + + if (t->setup) { + ret = t->setup(t, state); + if (ret < 0) { mutex_unlock(&data->mutex); - return 0; + return ret; } } - if (data->motion_trig == trig) { - ret = bmc150_accel_update_slope(data); - if (!ret) - ret = bmc150_accel_set_interrupt(data, - BMC150_ACCEL_INT_ANY_MOTION, - state); - } else { - ret = bmc150_accel_set_interrupt(data, - BMC150_ACCEL_INT_DATA_READY, - state); - } + ret = bmc150_accel_set_interrupt(data, t->intr, state); if (ret < 0) { mutex_unlock(&data->mutex); return ret; } - if (data->motion_trig == trig) - data->motion_trigger_on = state; - else - data->dready_trigger_on = state; + + t->enabled = state; mutex_unlock(&data->mutex); @@ -1040,7 +1052,7 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig, } static const struct iio_trigger_ops bmc150_accel_trigger_ops = { - .set_trigger_state = bmc150_accel_data_rdy_trigger_set_state, + .set_trigger_state = bmc150_accel_trigger_set_state, .try_reenable = bmc150_accel_trig_try_reen, .owner = THIS_MODULE, }; @@ -1086,7 +1098,7 @@ static irqreturn_t bmc150_accel_event_handler(int irq, void *private) dir), data->timestamp); ack_intr_status: - if (!data->dready_trigger_on) + if (!data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY].enabled) ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_RST_LATCH, BMC150_ACCEL_INT_MODE_LATCH_INT | @@ -1099,13 +1111,16 @@ static irqreturn_t bmc150_accel_data_rdy_trig_poll(int irq, void *private) { struct iio_dev *indio_dev = private; struct bmc150_accel_data *data = iio_priv(indio_dev); + int i; data->timestamp = iio_get_time_ns(); - if (data->dready_trigger_on) - iio_trigger_poll(data->dready_trig); - else if (data->motion_trigger_on) - iio_trigger_poll(data->motion_trig); + for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { + if (data->triggers[i].enabled) { + iio_trigger_poll(data->triggers[i].indio_trig); + break; + } + } if (data->ev_enable_state) return IRQ_WAKE_THREAD; @@ -1153,6 +1168,70 @@ static int bmc150_accel_gpio_probe(struct i2c_client *client, return ret; } +static const struct { + int intr; + const char *name; + int (*setup)(struct bmc150_accel_trigger *t, bool state); +} bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = { + { + .intr = 0, + .name = "%s-dev%d", + }, + { + .intr = 1, + .name = "%s-any-motion-dev%d", + .setup = bmc150_accel_any_motion_setup, + }, +}; + +static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data, + int from) +{ + int i; + + for (i = from; i >= 0; i++) { + if (data->triggers[i].indio_trig) { + iio_trigger_unregister(data->triggers[i].indio_trig); + data->triggers[i].indio_trig = NULL; + } + } +} + +static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev, + struct bmc150_accel_data *data) +{ + int i, ret; + + for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { + struct bmc150_accel_trigger *t = &data->triggers[i]; + + t->indio_trig = devm_iio_trigger_alloc(&data->client->dev, + bmc150_accel_triggers[i].name, + indio_dev->name, + indio_dev->id); + if (!t->indio_trig) { + ret = -ENOMEM; + break; + } + + t->indio_trig->dev.parent = &data->client->dev; + t->indio_trig->ops = &bmc150_accel_trigger_ops; + t->intr = bmc150_accel_triggers[i].intr; + t->data = data; + t->setup = bmc150_accel_triggers[i].setup; + iio_trigger_set_drvdata(t->indio_trig, t); + + ret = iio_trigger_register(t->indio_trig); + if (ret) + break; + } + + if (ret) + bmc150_accel_unregister_triggers(data, i - 1); + + return ret; +} + static int bmc150_accel_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1223,36 +1302,10 @@ static int bmc150_accel_probe(struct i2c_client *client, bmc150_accel_interrupts_setup(indio_dev, data); - data->dready_trig = devm_iio_trigger_alloc(&client->dev, - "%s-dev%d", - indio_dev->name, - indio_dev->id); - if (!data->dready_trig) - return -ENOMEM; - - data->motion_trig = devm_iio_trigger_alloc(&client->dev, - "%s-any-motion-dev%d", - indio_dev->name, - indio_dev->id); - if (!data->motion_trig) - return -ENOMEM; - - data->dready_trig->dev.parent = &client->dev; - data->dready_trig->ops = &bmc150_accel_trigger_ops; - iio_trigger_set_drvdata(data->dready_trig, indio_dev); - ret = iio_trigger_register(data->dready_trig); + ret = bmc150_accel_triggers_setup(indio_dev, data); if (ret) return ret; - data->motion_trig->dev.parent = &client->dev; - data->motion_trig->ops = &bmc150_accel_trigger_ops; - iio_trigger_set_drvdata(data->motion_trig, indio_dev); - ret = iio_trigger_register(data->motion_trig); - if (ret) { - data->motion_trig = NULL; - goto err_trigger_unregister; - } - ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, bmc150_accel_trigger_handler, @@ -1284,13 +1337,10 @@ static int bmc150_accel_probe(struct i2c_client *client, err_iio_unregister: iio_device_unregister(indio_dev); err_buffer_cleanup: - if (data->dready_trig) + if (indio_dev->pollfunc) iio_triggered_buffer_cleanup(indio_dev); err_trigger_unregister: - if (data->dready_trig) - iio_trigger_unregister(data->dready_trig); - if (data->motion_trig) - iio_trigger_unregister(data->motion_trig); + bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); return ret; } @@ -1306,11 +1356,7 @@ static int bmc150_accel_remove(struct i2c_client *client) iio_device_unregister(indio_dev); - if (data->dready_trig) { - iio_triggered_buffer_cleanup(indio_dev); - iio_trigger_unregister(data->dready_trig); - iio_trigger_unregister(data->motion_trig); - } + bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); mutex_lock(&data->mutex); bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0); |