diff options
Diffstat (limited to 'drivers/staging/iio/accel/adis16240_ring.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16240_ring.c | 66 |
1 files changed, 31 insertions, 35 deletions
diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c index f882e9c150e2..a6d27d213921 100644 --- a/drivers/staging/iio/accel/adis16240_ring.c +++ b/drivers/staging/iio/accel/adis16240_ring.c @@ -60,17 +60,6 @@ static struct attribute_group adis16240_scan_el_group = { }; /** - * adis16240_poll_func_th() top half interrupt handler called by trigger - * @private_data: iio_dev - **/ -static void adis16240_poll_func_th(struct iio_dev *indio_dev, s64 time) -{ - struct adis16240_state *st = iio_dev_get_devdata(indio_dev); - st->last_timestamp = time; - schedule_work(&st->work_trigger_to_ring); -} - -/** * adis16240_read_ring_data() read data registers which will be placed into ring * @dev: device associated with child of actual device (iio_dev or iio_trig) * @rx: somewhere to pass back the value read @@ -112,46 +101,43 @@ static int adis16240_read_ring_data(struct device *dev, u8 *rx) return ret; } - -static void adis16240_trigger_bh_to_ring(struct work_struct *work_s) +static irqreturn_t adis16240_trigger_handler(int irq, void *p) { - struct adis16240_state *st - = container_of(work_s, struct adis16240_state, - work_trigger_to_ring); - struct iio_ring_buffer *ring = st->indio_dev->ring; + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->private_data; + struct adis16240_state *st = iio_dev_get_devdata(indio_dev); + struct iio_ring_buffer *ring = indio_dev->ring; int i = 0; s16 *data; size_t datasize = ring->access.get_bytes_per_datum(ring); - data = kmalloc(datasize , GFP_KERNEL); + data = kmalloc(datasize, GFP_KERNEL); if (data == NULL) { dev_err(&st->us->dev, "memory alloc failed in ring bh"); - return; + return -ENOMEM; } - if (ring->scan_count) - if (adis16240_read_ring_data(&st->indio_dev->dev, st->rx) >= 0) - for (; i < ring->scan_count; i++) - data[i] = be16_to_cpup( - (__be16 *)&(st->rx[i*2])); + if (ring->scan_count && + adis16240_read_ring_data(&st->indio_dev->dev, st->rx) >= 0) + for (; i < ring->scan_count; i++) + data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2])); /* Guaranteed to be aligned with 8 byte boundary */ if (ring->scan_timestamp) - *((s64 *)(data + ((i + 3)/4)*4)) = st->last_timestamp; + *((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp; - ring->access.store_to(ring, - (u8 *)data, - st->last_timestamp); + ring->access.store_to(ring, (u8 *)data, pf->timestamp); iio_trigger_notify_done(st->indio_dev->trig); kfree(data); - return; + return IRQ_HANDLED; } void adis16240_unconfigure_ring(struct iio_dev *indio_dev) { + kfree(indio_dev->pollfunc->name); kfree(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } @@ -159,9 +145,7 @@ void adis16240_unconfigure_ring(struct iio_dev *indio_dev) int adis16240_configure_ring(struct iio_dev *indio_dev) { int ret = 0; - struct adis16240_state *st = indio_dev->dev_data; struct iio_ring_buffer *ring; - INIT_WORK(&st->work_trigger_to_ring, adis16240_trigger_bh_to_ring); ring = iio_sw_rb_allocate(indio_dev); if (!ring) { @@ -187,13 +171,25 @@ int adis16240_configure_ring(struct iio_dev *indio_dev) iio_scan_mask_set(ring, iio_scan_el_temp.number); iio_scan_mask_set(ring, iio_scan_el_in0.number); - ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16240_poll_func_th); - if (ret) + indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL); + if (indio_dev->pollfunc == NULL) { + ret = -ENOMEM; goto error_iio_sw_rb_free; - + } + indio_dev->pollfunc->private_data = indio_dev; + indio_dev->pollfunc->h = &iio_pollfunc_store_time; + indio_dev->pollfunc->thread = &adis16240_trigger_handler; + indio_dev->pollfunc->type = IRQF_ONESHOT; + indio_dev->pollfunc->name = + kasprintf(GFP_KERNEL, "adis16240_consumer%d", indio_dev->id); + if (indio_dev->pollfunc->name == NULL) { + ret = -ENOMEM; + goto error_free_poll_func; + } indio_dev->modes |= INDIO_RING_TRIGGERED; return 0; - +error_free_poll_func: + kfree(indio_dev->pollfunc); error_iio_sw_rb_free: iio_sw_rb_free(indio_dev->ring); return ret; |