staging:iio:meter:ade7758 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>

diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h
index c6fd94f..169982b 100644 (file)
--- a/drivers/staging/iio/meter/ade7758.h
+++ b/drivers/staging/iio/meter/ade7758.h
@@ -92,9 +92,6 @@
 /**
  * struct ade7758_state - device instance specific data
  * @us:                        actual spi_device
- * @work_trigger_to_ring: bh for triggered event handling
- * @inter:             used to check if new interrupt has been triggered
- * @last_timestamp:    passing timestamp from th to bh of interrupt handler
  * @indio_dev:         industrial I/O device structure
  * @trig:              data ready trigger registered with iio
  * @tx:                        transmit buffer
@@ -103,8 +100,6 @@
  **/
 struct ade7758_state {
        struct spi_device               *us;
-       struct work_struct              work_trigger_to_ring;
-       s64                             last_timestamp;
        struct iio_dev                  *indio_dev;
        struct iio_trigger              *trig;
        u8                              *tx;

diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c
index 274b4a0..2c9865d 100644 (file)
--- a/drivers/staging/iio/meter/ade7758_ring.c
+++ b/drivers/staging/iio/meter/ade7758_ring.c
@@ -50,23 +50,6 @@ static struct attribute_group ade7758_scan_el_group = {
 };
 
 /**
- * ade7758_poll_func_th() top half interrupt handler called by trigger
- * @private_data:      iio_dev
- **/
-static void ade7758_poll_func_th(struct iio_dev *indio_dev, s64 time)
-{
-       struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
-       st->last_timestamp = time;
-       schedule_work(&st->work_trigger_to_ring);
-       /* Indicate that this interrupt is being handled */
-
-       /* Technically this is trigger related, but without this
-        * handler running there is currently no way for the interrupt
-        * to clear.
-        */
-}
-
-/**
  * ade7758_spi_read_burst() - read all data registers
  * @dev: device associated with child of actual device (iio_dev or iio_trig)
  * @rx: somewhere to pass back the value read (min size is 24 bytes)
@@ -117,13 +100,12 @@ static int ade7758_spi_read_burst(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 ade7758_trigger_bh_to_ring(struct work_struct *work_s)
+static irqreturn_t ade7758_trigger_handler(int irq, void *p)
 {
-       struct ade7758_state *st
-               = container_of(work_s, struct ade7758_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 iio_ring_buffer *ring = indio_dev->ring;
+       struct ade7758_state *st = iio_dev_get_devdata(indio_dev);
        int i = 0;
        s32 *data;
        size_t datasize = ring->access.get_bytes_per_datum(ring);
@@ -131,7 +113,7 @@ static void ade7758_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 +127,21 @@ static void ade7758_trigger_bh_to_ring(struct work_struct *work_s)
        if (ring->scan_timestamp)
                *((s64 *)
                (((u32)data + 4 * ring->scan_count + 4) & ~0x7)) =
-                       st->last_timestamp;
+                       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 ade7758_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 +149,7 @@ void ade7758_unconfigure_ring(struct iio_dev *indio_dev)
 int ade7758_configure_ring(struct iio_dev *indio_dev)
 {
        int ret = 0;
-       struct ade7758_state *st = indio_dev->dev_data;
        struct iio_ring_buffer *ring;
-       INIT_WORK(&st->work_trigger_to_ring, ade7758_trigger_bh_to_ring);
 
        ring = iio_sw_rb_allocate(indio_dev);
        if (!ring) {
@@ -189,13 +170,26 @@ int ade7758_configure_ring(struct iio_dev *indio_dev)
        /* Set default scan mode */
        iio_scan_mask_set(ring, iio_scan_el_wform.number);
 
-       ret = iio_alloc_pollfunc(indio_dev, NULL, &ade7758_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->ring;
+       indio_dev->pollfunc->h = &iio_pollfunc_store_time;
+       indio_dev->pollfunc->thread = &ade7758_trigger_handler;
+       indio_dev->pollfunc->name
+               = kasprintf(GFP_KERNEL, "ade7759_consumer%d", indio_dev->id);
+       if (indio_dev->pollfunc->name == NULL) {
+               ret = -ENOMEM;
+               goto error_free_pollfunc;
+       }
        indio_dev->modes |= INDIO_RING_TRIGGERED;
+
        return 0;
 
+error_free_pollfunc:
+       kfree(indio_dev->pollfunc);
 error_iio_sw_rb_free:
        iio_sw_rb_free(indio_dev->ring);
        return ret;