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Commit b9d40a9d authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files

staging:iio: remove legacy event chrdev for the buffers 



part of sca3000 driver temporarily disabled (buffer won't run
anyway).  This section is replaced later in this patch set.

Signed-off-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a7348347

drivers/staging/iio/accel/sca3000_ring.c

+2 −0
Original line number Diff line number Diff line
@@ -357,6 +357,7 @@ void sca3000_register_ring_funcs(struct iio_dev *indio_dev) 
 **/

void sca3000_ring_int_process(u8 val, struct iio_ring_buffer *ring)

{

	/*

	if (val & SCA3000_INT_STATUS_THREE_QUARTERS)

		iio_push_ring_event(ring,

				    IIO_EVENT_CODE_RING_75_FULL,
@@ -364,4 +365,5 @@ void sca3000_ring_int_process(u8 val, struct iio_ring_buffer *ring) 
	else if (val & SCA3000_INT_STATUS_HALF)

		iio_push_ring_event(ring,

				    IIO_EVENT_CODE_RING_50_FULL, 0);

	*/

}

drivers/staging/iio/iio.h

+0 −14
Original line number Diff line number Diff line
@@ -399,20 +399,6 @@ int __iio_push_event(struct iio_event_interface *ev_int, 
		     int ev_code,

		     s64 timestamp);



/**

 * iio_setup_ev_int() - configure an event interface (chrdev)

 * @name:		name used for resulting sysfs directory etc.

 * @ev_int:		interface we are configuring

 * @owner:		module that is responsible for registering this ev_int

 * @dev:		device whose ev_int this is

 **/

int iio_setup_ev_int(struct iio_event_interface *ev_int,

		     const char *name,

		     struct module *owner,

		     struct device *dev);



void iio_free_ev_int(struct iio_event_interface *ev_int);



/**

 * iio_allocate_chrdev() - Allocate a chrdev

 * @handler:	struct that contains relevant file handling for chrdev

drivers/staging/iio/industrialio-core.c

+2 −2
Original line number Diff line number Diff line
@@ -393,7 +393,7 @@ void iio_device_free_chrdev_minor(int val) 
	spin_unlock(&iio_ida_lock);

}



int iio_setup_ev_int(struct iio_event_interface *ev_int,

static int iio_setup_ev_int(struct iio_event_interface *ev_int,

		     const char *name,

		     struct module *owner,

		     struct device *dev)
@@ -445,7 +445,7 @@ error_device_put: 
	return ret;

}



void iio_free_ev_int(struct iio_event_interface *ev_int)

static void iio_free_ev_int(struct iio_event_interface *ev_int)

{

	device_unregister(&ev_int->dev);

	put_device(&ev_int->dev);

drivers/staging/iio/industrialio-ring.c

+1 −57
Original line number Diff line number Diff line
@@ -23,16 +23,6 @@ 
#include "iio.h"

#include "ring_generic.h"



int iio_push_ring_event(struct iio_ring_buffer *ring_buf,

		       int event_code,

		       s64 timestamp)

{

	return __iio_push_event(&ring_buf->ev_int,

				event_code,

				timestamp);

}

EXPORT_SYMBOL(iio_push_ring_event);



/**

 * iio_ring_open() - chrdev file open for ring buffer access

 *
@@ -116,43 +106,6 @@ static const struct file_operations iio_ring_fileops = { 
	.llseek = noop_llseek,

};



/**

 * __iio_request_ring_buffer_event_chrdev() - allocate ring event chrdev

 * @buf:	ring buffer whose event chrdev we are allocating

 * @id:		id of this ring buffer (typically 0)

 * @owner:	the module who owns the ring buffer (for ref counting)

 * @dev:	device with which the chrdev is associated

 **/

static inline int

__iio_request_ring_buffer_event_chrdev(struct iio_ring_buffer *buf,

				       int id,

				       struct module *owner,

				       struct device *dev)

{

	int ret;



	snprintf(buf->ev_int._name, sizeof(buf->ev_int._name),

		 "%s:event%d",

		 dev_name(&buf->dev),

		 id);

	ret = iio_setup_ev_int(&(buf->ev_int),

			       buf->ev_int._name,

			       owner,

			       dev);

	if (ret)

		goto error_ret;

	return 0;



error_ret:

	return ret;

}



static inline void

__iio_free_ring_buffer_event_chrdev(struct iio_ring_buffer *buf)

{

	iio_free_ev_int(&(buf->ev_int));

}



static void iio_ring_access_release(struct device *dev)

{

	struct iio_ring_buffer *buf
@@ -227,7 +180,6 @@ void iio_ring_buffer_init(struct iio_ring_buffer *ring, 
	if (ring->access.mark_param_change)

		ring->access.mark_param_change(ring);

	ring->indio_dev = dev_info;

	ring->ev_int.private = ring;

	ring->access_handler.private = ring;

	init_waitqueue_head(&ring->pollq);

}
@@ -399,19 +351,12 @@ int iio_ring_buffer_register_ex(struct iio_ring_buffer *ring, int id, 
	if (ret)

		goto error_ret;



	ret = __iio_request_ring_buffer_event_chrdev(ring,

						     0,

						     ring->owner,

						     &ring->dev);

	if (ret)

		goto error_remove_device;



	ret = __iio_request_ring_buffer_access_chrdev(ring,

						      0,

						      ring->owner);



	if (ret)

		goto error_ret;

		goto error_remove_device;



	if (ring->scan_el_attrs) {

		ret = sysfs_create_group(&ring->dev.kobj,
@@ -462,7 +407,6 @@ void iio_ring_buffer_unregister(struct iio_ring_buffer *ring) 
{

	__iio_ring_attr_cleanup(ring);

	__iio_free_ring_buffer_access_chrdev(ring);

	__iio_free_ring_buffer_event_chrdev(ring);

	device_del(&ring->dev);

}

EXPORT_SYMBOL(iio_ring_buffer_unregister);

drivers/staging/iio/ring_generic.h

+0 −25
Original line number Diff line number Diff line
@@ -15,29 +15,6 @@ 


struct iio_ring_buffer;



/**

 * iio_push_ring_event() - ring buffer specific push to event chrdev

 * @ring_buf:		ring buffer that is the event source

 * @event_code:		event indentification code

 * @timestamp:		time of event

 **/

int iio_push_ring_event(struct iio_ring_buffer *ring_buf,

			int event_code,

			s64 timestamp);

/**

 * iio_push_or_escallate_ring_event() -	escalate or add as appropriate

 * @ring_buf:		ring buffer that is the event source

 * @event_code:		event indentification code

 * @timestamp:		time of event

 *

 * Typical usecase is to escalate a 50% ring full to 75% full if no one has yet

 * read the first event. Clearly the 50% full is no longer of interest in

 * typical use case.

 **/

int iio_push_or_escallate_ring_event(struct iio_ring_buffer *ring_buf,

				     int event_code,

				     s64 timestamp);



/**

 * struct iio_ring_access_funcs - access functions for ring buffers.

 * @mark_in_use:	reference counting, typically to prevent module removal
@@ -106,7 +83,6 @@ struct iio_ring_access_funcs { 
 * @scan_mask:		[INTERN] bitmask used in masking scan mode elements

 * @scan_timestamp:	[INTERN] does the scan mode include a timestamp

 * @access_handler:	[INTERN] chrdev access handling

 * @ev_int:		[INTERN] chrdev interface for the event chrdev

 * @access:		[DRIVER] ring access functions associated with the

 *			implementation.

 * @preenable:		[DRIVER] function to run prior to marking ring enabled
@@ -130,7 +106,6 @@ struct iio_ring_buffer { 
	u32				scan_mask;

	bool				scan_timestamp;

	struct iio_handler		access_handler;

	struct iio_event_interface	ev_int;

	struct iio_ring_access_funcs	access;

	int				(*preenable)(struct iio_dev *);

	int				(*postenable)(struct iio_dev *);