diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/accel/bmc150-accel.c | 86 |
1 files changed, 51 insertions, 35 deletions
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c index 46ac9659e2aa..db95237888ae 100644 --- a/drivers/iio/accel/bmc150-accel.c +++ b/drivers/iio/accel/bmc150-accel.c @@ -147,10 +147,24 @@ struct bmc150_accel_chip_info { const struct bmc150_scale_info scale_table[4]; }; +struct bmc150_accel_interrupt { + const struct bmc150_accel_interrupt_info *info; + atomic_t users; +}; + +enum bmc150_accel_interrupt_id { + BMC150_ACCEL_INT_DATA_READY, + BMC150_ACCEL_INT_ANY_MOTION, + BMC150_ACCEL_INT_WATERMARK, + BMC150_ACCEL_INTERRUPTS, +}; + 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 mutex mutex; s16 buffer[8]; u8 bw_bits; @@ -421,7 +435,7 @@ static const struct bmc150_accel_interrupt_info { u8 map_bitmask; u8 en_reg; u8 en_bitmask; -} bmc150_accel_interrupts[] = { +} bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = { { /* data ready interrupt */ .map_reg = BMC150_ACCEL_REG_INT_MAP_1, .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA, @@ -438,12 +452,30 @@ static const struct bmc150_accel_interrupt_info { }, }; -static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, - const struct bmc150_accel_interrupt_info *info, +static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev, + struct bmc150_accel_data *data) +{ + int i; + + for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++) + data->interrupts[i].info = &bmc150_accel_interrupts[i]; +} + +static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i, bool state) { + struct bmc150_accel_interrupt *intr = &data->interrupts[i]; + const struct bmc150_accel_interrupt_info *info = intr->info; int ret; + if (state) { + if (atomic_inc_return(&intr->users) > 1) + return 0; + } else { + if (atomic_dec_return(&intr->users) > 0) + return 0; + } + /* * We will expect the enable and disable to do operation in * in reverse order. This will happen here anyway as our @@ -493,6 +525,11 @@ static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, goto out_fix_power_state; } + if (state) + atomic_inc(&data->active_intr); + else + atomic_dec(&data->active_intr); + return 0; out_fix_power_state: @@ -500,20 +537,6 @@ out_fix_power_state: return ret; } -static int bmc150_accel_setup_any_motion_interrupt( - struct bmc150_accel_data *data, - bool status) -{ - return bmc150_accel_set_interrupt(data, &bmc150_accel_interrupts[1], - status); -} - -static int bmc150_accel_setup_new_data_interrupt(struct bmc150_accel_data *data, - bool status) -{ - return bmc150_accel_set_interrupt(data, &bmc150_accel_interrupts[0], - status); -} static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) { @@ -753,13 +776,8 @@ static int bmc150_accel_write_event_config(struct iio_dev *indio_dev, mutex_lock(&data->mutex); - if (!state && data->motion_trigger_on) { - data->ev_enable_state = 0; - mutex_unlock(&data->mutex); - return 0; - } - - ret = bmc150_accel_setup_any_motion_interrupt(data, state); + ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION, + state); if (ret < 0) { mutex_unlock(&data->mutex); return ret; @@ -996,19 +1014,16 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig, } } - if (!state && data->ev_enable_state && data->motion_trigger_on) { - data->motion_trigger_on = false; - mutex_unlock(&data->mutex); - return 0; - } - if (data->motion_trig == trig) { ret = bmc150_accel_update_slope(data); if (!ret) - ret = bmc150_accel_setup_any_motion_interrupt(data, - state); + ret = bmc150_accel_set_interrupt(data, + BMC150_ACCEL_INT_ANY_MOTION, + state); } else { - ret = bmc150_accel_setup_new_data_interrupt(data, state); + ret = bmc150_accel_set_interrupt(data, + BMC150_ACCEL_INT_DATA_READY, + state); } if (ret < 0) { mutex_unlock(&data->mutex); @@ -1206,6 +1221,8 @@ static int bmc150_accel_probe(struct i2c_client *client, return ret; } + bmc150_accel_interrupts_setup(indio_dev, data); + data->dready_trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d", indio_dev->name, @@ -1321,8 +1338,7 @@ static int bmc150_accel_resume(struct device *dev) struct bmc150_accel_data *data = iio_priv(indio_dev); mutex_lock(&data->mutex); - if (data->dready_trigger_on || data->motion_trigger_on || - data->ev_enable_state) + if (atomic_read(&data->active_intr)) bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); mutex_unlock(&data->mutex); |