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author | Jonathan Cameron <jic23@cam.ac.uk> | 2011-05-18 13:41:34 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-19 23:14:52 (GMT) |
commit | 80142f0de68a3d68f114f25f56e736c4a63e1c18 (patch) | |
tree | e02626560fe4ce034765087e29dc768f1d31a83f /drivers/staging/iio/accel/adis16204_ring.c | |
parent | f3dadc1dd2ac91529c39ee0015fc91e2ea474453 (diff) | |
download | linux-fsl-qoriq-80142f0de68a3d68f114f25f56e736c4a63e1c18.tar.xz |
staging:iio:accel:adis16204 move to irqchip based trigger handling.
Untested.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/iio/accel/adis16204_ring.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16204_ring.c | 53 |
1 files changed, 26 insertions, 27 deletions
diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c index 420b160f..035e5c4 100644 --- a/drivers/staging/iio/accel/adis16204_ring.c +++ b/drivers/staging/iio/accel/adis16204_ring.c @@ -56,17 +56,6 @@ static struct attribute_group adis16204_scan_el_group = { }; /** - * adis16204_poll_func_th() top half interrupt handler called by trigger - * @private_data: iio_dev - **/ -static void adis16204_poll_func_th(struct iio_dev *indio_dev, s64 timestamp) -{ - struct adis16204_state *st = iio_dev_get_devdata(indio_dev); - st->last_timestamp = timestamp; - schedule_work(&st->work_trigger_to_ring); -} - -/** * adis16204_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 @@ -110,13 +99,12 @@ static int adis16204_read_ring_data(struct device *dev, u8 *rx) /* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device * specific to be rolled into the core. */ -static void adis16204_trigger_bh_to_ring(struct work_struct *work_s) +static irqreturn_t adis16204_trigger_handler(int irq, void *p) { - struct adis16204_state *st - = container_of(work_s, struct adis16204_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 adis16204_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); @@ -124,7 +112,7 @@ static void adis16204_trigger_bh_to_ring(struct work_struct *work_s) 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) @@ -135,20 +123,19 @@ static void adis16204_trigger_bh_to_ring(struct work_struct *work_s) /* 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 adis16204_unconfigure_ring(struct iio_dev *indio_dev) { + kfree(indio_dev->pollfunc->name); kfree(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } @@ -156,9 +143,7 @@ void adis16204_unconfigure_ring(struct iio_dev *indio_dev) int adis16204_configure_ring(struct iio_dev *indio_dev) { int ret = 0; - struct adis16204_state *st = indio_dev->dev_data; struct iio_ring_buffer *ring; - INIT_WORK(&st->work_trigger_to_ring, adis16204_trigger_bh_to_ring); ring = iio_sw_rb_allocate(indio_dev); if (!ring) { @@ -183,13 +168,27 @@ int adis16204_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, &adis16204_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 = &adis16204_trigger_handler; + indio_dev->pollfunc->type = IRQF_ONESHOT; + indio_dev->pollfunc->name = + kasprintf(GFP_KERNEL, "adis16204_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; |