staging:iio:accel:adis16201 move to irqchip based trigger handling.

[karo-tx-linux.git] / drivers / staging / iio / accel / adis16201_ring.c

diff --git a/drivers/staging/iio/accel/adis16201_ring.c b/drivers/staging/iio/accel/adis16201_ring.c
index e6870a2721f121efe05441b76185b5b49c230cd3..d0998b211618c0e29202d0ab02487374f78afa45 100644 (file)
--- a/drivers/staging/iio/accel/adis16201_ring.c
+++ b/drivers/staging/iio/accel/adis16201_ring.c
@@ -65,17 +65,6 @@ static struct attribute_group adis16201_scan_el_group = {
        .name = "scan_elements",
 };
 
-/**
- * adis16201_poll_func_th() top half interrupt handler called by trigger
- * @private_data:      iio_dev
- **/
-static void adis16201_poll_func_th(struct iio_dev *indio_dev, s64 time)
-{
-       struct adis16201_state *st = iio_dev_get_devdata(indio_dev);
-       st->last_timestamp = time;
-       schedule_work(&st->work_trigger_to_ring);
-}
-
 /**
  * adis16201_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)
@@ -120,12 +109,12 @@ static int adis16201_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 adis16201_trigger_bh_to_ring(struct work_struct *work_s)
+static irqreturn_t adis16201_trigger_handler(int irq, void *p)
 {
-       struct adis16201_state *st
-               = container_of(work_s, struct adis16201_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 adis16201_state *st = iio_dev_get_devdata(indio_dev);
+       struct iio_ring_buffer *ring = indio_dev->ring;
 
        int i = 0;
        s16 *data;
@@ -134,7 +123,7 @@ static void adis16201_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)
@@ -145,20 +134,21 @@ static void adis16201_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);
+                             pf->timestamp);
 
        iio_trigger_notify_done(st->indio_dev->trig);
        kfree(data);
 
-       return;
+       return IRQ_HANDLED;
 }
 
 void adis16201_unconfigure_ring(struct iio_dev *indio_dev)
 {
+       kfree(indio_dev->pollfunc->name);
        kfree(indio_dev->pollfunc);
        iio_sw_rb_free(indio_dev->ring);
 }
@@ -166,9 +156,7 @@ void adis16201_unconfigure_ring(struct iio_dev *indio_dev)
 int adis16201_configure_ring(struct iio_dev *indio_dev)
 {
        int ret = 0;
-       struct adis16201_state *st = indio_dev->dev_data;
        struct iio_ring_buffer *ring;
-       INIT_WORK(&st->work_trigger_to_ring, adis16201_trigger_bh_to_ring);
 
        ring = iio_sw_rb_allocate(indio_dev);
        if (!ring) {
@@ -195,13 +183,26 @@ int adis16201_configure_ring(struct iio_dev *indio_dev)
        iio_scan_mask_set(ring, iio_scan_el_incli_x.number);
        iio_scan_mask_set(ring, iio_scan_el_incli_y.number);
 
-       ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16201_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 = &adis16201_trigger_handler;
+       indio_dev->pollfunc->type = IRQF_ONESHOT;
+       indio_dev->pollfunc->name =
+               kasprintf(GFP_KERNEL, "adis16201_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;