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Commit 80142f0d authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files

staging:iio:accel:adis16204 move to irqchip based trigger handling. 



Untested.

Signed-off-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f3dadc1d

drivers/staging/iio/accel/adis16204.h

+0 −5
Original line number Diff line number Diff line
@@ -67,9 +67,6 @@ 
/**

 * struct adis16204_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
@@ -78,8 +75,6 @@ 
 **/

struct adis16204_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;

drivers/staging/iio/accel/adis16204_ring.c

+26 −27
Original line number Diff line number Diff line
@@ -55,17 +55,6 @@ static struct attribute_group adis16204_scan_el_group = { 
	.name = "scan_elements",

};



/**

 * 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)
@@ -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;

drivers/staging/iio/accel/adis16204_trigger.c

+16 −35
Original line number Diff line number Diff line
@@ -12,16 +12,6 @@ 
#include "../trigger.h"

#include "adis16204.h"



/**

 * adis16204_data_rdy_trig_poll() the event handler for the data rdy trig

 **/

static irqreturn_t adis16204_data_rdy_trig_poll(int irq, void *private)

{

	disable_irq_nosync(irq);

	iio_trigger_poll(private, iio_get_time_ns());

	return IRQ_HANDLED;

}



static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);



static struct attribute *adis16204_trigger_attrs[] = {
@@ -46,63 +36,54 @@ static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig, 
	return adis16204_set_irq(&st->indio_dev->dev, state);

}



/**

 * adis16204_trig_try_reen() try renabling irq for data rdy trigger

 * @trig:	the datardy trigger

 **/

static int adis16204_trig_try_reen(struct iio_trigger *trig)

{

	struct adis16204_state *st = trig->private_data;

	enable_irq(st->us->irq);

	return 0;

}



int adis16204_probe_trigger(struct iio_dev *indio_dev)

{

	int ret;

	struct adis16204_state *st = indio_dev->dev_data;

	char *name;



	st->trig = iio_allocate_trigger();

	if (st->trig == NULL) {

	name = kasprintf(GFP_KERNEL,

			 "adis16204-dev%d",

			 indio_dev->id);

	if (name == NULL) {

		ret = -ENOMEM;

		goto error_ret;

	}



	st->trig = iio_allocate_trigger_named(name);

	if (st->trig == NULL) {

		ret = -ENOMEM;

		goto error_free_name;

	}



	ret = request_irq(st->us->irq,

			  adis16204_data_rdy_trig_poll,

			  &iio_trigger_generic_data_rdy_poll,

			  IRQF_TRIGGER_RISING,

			  "adis16204",

			  st->trig);

	if (ret)

		goto error_free_trig;



	st->trig->name = kasprintf(GFP_KERNEL,

				"adis16204-dev%d",

				indio_dev->id);

	if (!st->trig->name) {

		ret = -ENOMEM;

		goto error_free_irq;

	}

	st->trig->dev.parent = &st->us->dev;

	st->trig->owner = THIS_MODULE;

	st->trig->private_data = st;

	st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;

	st->trig->try_reenable = &adis16204_trig_try_reen;

	st->trig->control_attrs = &adis16204_trigger_attr_group;

	ret = iio_trigger_register(st->trig);



	/* select default trigger */

	indio_dev->trig = st->trig;

	if (ret)

		goto error_free_trig_name;

		goto error_free_irq;



	return 0;



error_free_trig_name:

	kfree(st->trig->name);

error_free_irq:

	free_irq(st->us->irq, st->trig);

error_free_trig:

	iio_free_trigger(st->trig);

error_free_name:

	kfree(name);

error_ret:

	return ret;

}