Octavian Purdila schrieb am 17.11.2014 18:56:
> 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@xxxxxxxxx>
> ---
> drivers/iio/accel/bmc150-accel.c | 175 ++++++++++++++++++++++-----------------
> 1 file changed, 101 insertions(+), 74 deletions(-)
>
> diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
> index 5a430dc..ed02ced 100644
> --- a/drivers/iio/accel/bmc150-accel.c
> +++ b/drivers/iio/accel/bmc150-accel.c
> @@ -156,14 +156,21 @@ struct bmc150_accel_interrupt {
> atomic_t users;
> };
>
> +struct bmc150_accel_trigger {
> + struct bmc150_accel_interrupt *intr;
> + struct bmc150_accel_data *data;
> + struct iio_trigger *indio_trig;
> + bool enabled;
> +};
> +
> #define BMC150_ACCEL_INTERRUPTS 2
> +#define BMC150_ACCEL_TRIGGERS 2
>
> 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;
> @@ -171,8 +178,6 @@ 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;
> };
> @@ -800,11 +805,14 @@ 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(
> @@ -976,12 +984,12 @@ 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[0])
> return 0;
>
> mutex_lock(&data->mutex);
> @@ -1003,38 +1011,24 @@ static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
> static int bmc150_accel_data_rdy_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) {
> - mutex_unlock(&data->mutex);
> - return 0;
> - }
> + if (t->enabled == state) {
> + mutex_unlock(&data->mutex);
> + return 0;
> }
>
> - if (data->motion_trig == trig)
> - ret = bmc150_accel_set_interrupt(data, &data->interrupts[1],
> - state);
> - else
> - ret = bmc150_accel_set_interrupt(data, &data->interrupts[0],
> - 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);
>
> @@ -1074,7 +1068,7 @@ static irqreturn_t bmc150_accel_event_handler(int irq, void *private)
> IIO_EV_DIR_EITHER),
> data->timestamp);
> ack_intr_status:
> - if (!data->dready_trigger_on)
> + if (!data->triggers[0].enabled)
> ret = i2c_smbus_write_byte_data(data->client,
> BMC150_ACCEL_REG_INT_RST_LATCH,
> BMC150_ACCEL_INT_MODE_LATCH_INT |
> @@ -1087,13 +1081,16 @@ 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;
> @@ -1145,6 +1142,69 @@ static int bmc150_accel_gpio_probe(struct i2c_client *client,
> return ret;
> }
>
> +static struct {
> + int intr;
> + const char *name;
> +} bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = {
> + {
> + .intr = 0,
> + .name = "%s-dev%d",
> + },
> + {
> + .intr = 1,
> + .name = "%s-any-motion-dev%d",
> + },
> +};
> +
> +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;
Better use devm_iio_trigger_free()?
> + }
> + i--;
> + }
i++ and i-- in the same loop looks like an infinite loop to me. Not to mention what happens on the second attempt to unregister the same trigger.
> +}
> +
> +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];
> + const char *name = bmc150_accel_triggers[i].name;
> + int intr = bmc150_accel_triggers[i].intr;
> +
> + t->indio_trig = devm_iio_trigger_alloc(&data->client->dev, 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 = &data->interrupts[intr];
> + t->data = data;
> + 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);
I think this should be called with i - 1.
> +
> + return ret;
> +}
> +
> static int bmc150_accel_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> @@ -1215,36 +1275,10 @@ 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,
> @@ -1276,13 +1310,10 @@ 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;
> }
> @@ -1298,11 +1329,7 @@ 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);
>
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