1 files changed, 0 insertions, 431 deletions
diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c
deleted file mode 100644
index 57dd9232cf0..00000000000
--- a/drivers/staging/iio/industrialio-trigger.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/* The industrial I/O core, trigger handling functions
- *
- * Copyright (c) 2008 Jonathan Cameron
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/idr.h>
-#include <linux/err.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-
-#include "iio.h"
-#include "trigger.h"
-#include "trigger_consumer.h"
-
-/* RFC - Question of approach
- * Make the common case (single sensor single trigger)
- * simple by starting trigger capture from when first sensors
- * is added.
- *
- * Complex simultaneous start requires use of 'hold' functionality
- * of the trigger. (not implemented)
- *
- * Any other suggestions?
- */
-
-static DEFINE_IDR(iio_trigger_idr);
-static DEFINE_SPINLOCK(iio_trigger_idr_lock);
-
-/* Single list of all available triggers */
-static LIST_HEAD(iio_trigger_list);
-static DEFINE_MUTEX(iio_trigger_list_lock);
-
-/**
- * iio_trigger_register_sysfs() - create a device for this trigger
- * @trig_info:	the trigger
- *
- * Also adds any control attribute registered by the trigger driver
- **/
-static int iio_trigger_register_sysfs(struct iio_trigger *trig_info)
-{
-	int ret = 0;
-
-	if (trig_info->control_attrs)
-		ret = sysfs_create_group(&trig_info->dev.kobj,
-					 trig_info->control_attrs);
-
-	return ret;
-}
-
-static void iio_trigger_unregister_sysfs(struct iio_trigger *trig_info)
-{
-	if (trig_info->control_attrs)
-		sysfs_remove_group(&trig_info->dev.kobj,
-				   trig_info->control_attrs);
-}
-
-
-/**
- * iio_trigger_register_id() - get a unique id for this trigger
- * @trig_info:	the trigger
- **/
-static int iio_trigger_register_id(struct iio_trigger *trig_info)
-{
-	int ret = 0;
-
-idr_again:
-	if (unlikely(idr_pre_get(&iio_trigger_idr, GFP_KERNEL) == 0))
-		return -ENOMEM;
-
-	spin_lock(&iio_trigger_idr_lock);
-	ret = idr_get_new(&iio_trigger_idr, NULL, &trig_info->id);
-	spin_unlock(&iio_trigger_idr_lock);
-	if (unlikely(ret == -EAGAIN))
-		goto idr_again;
-	else if (likely(!ret))
-		trig_info->id = trig_info->id & MAX_ID_MASK;
-
-	return ret;
-}
-
-/**
- * iio_trigger_unregister_id() - free up unique id for use by another trigger
- * @trig_info: the trigger
- **/
-static void iio_trigger_unregister_id(struct iio_trigger *trig_info)
-{
-	spin_lock(&iio_trigger_idr_lock);
-	idr_remove(&iio_trigger_idr, trig_info->id);
-	spin_unlock(&iio_trigger_idr_lock);
-}
-
-int iio_trigger_register(struct iio_trigger *trig_info)
-{
-	int ret;
-
-	ret = iio_trigger_register_id(trig_info);
-	if (ret)
-		goto error_ret;
-	/* Set the name used for the sysfs directory etc */
-	dev_set_name(&trig_info->dev, "trigger%ld",
-		     (unsigned long) trig_info->id);
-
-	ret = device_add(&trig_info->dev);
-	if (ret)
-		goto error_unregister_id;
-
-	ret = iio_trigger_register_sysfs(trig_info);
-	if (ret)
-		goto error_device_del;
-
-	/* Add to list of available triggers held by the IIO core */
-	mutex_lock(&iio_trigger_list_lock);
-	list_add_tail(&trig_info->list, &iio_trigger_list);
-	mutex_unlock(&iio_trigger_list_lock);
-
-	return 0;
-
-error_device_del:
-	device_del(&trig_info->dev);
-error_unregister_id:
-	iio_trigger_unregister_id(trig_info);
-error_ret:
-	return ret;
-}
-EXPORT_SYMBOL(iio_trigger_register);
-
-void iio_trigger_unregister(struct iio_trigger *trig_info)
-{
-	struct iio_trigger *cursor;
-
-	mutex_lock(&iio_trigger_list_lock);
-	list_for_each_entry(cursor, &iio_trigger_list, list)
-		if (cursor == trig_info) {
-			list_del(&cursor->list);
-			break;
-		}
-	mutex_unlock(&iio_trigger_list_lock);
-
-	iio_trigger_unregister_sysfs(trig_info);
-	iio_trigger_unregister_id(trig_info);
-	/* Possible issue in here */
-	device_unregister(&trig_info->dev);
-}
-EXPORT_SYMBOL(iio_trigger_unregister);
-
-struct iio_trigger *iio_trigger_find_by_name(const char *name, size_t len)
-{
-	struct iio_trigger *trig;
-	bool found = false;
-
-	if (len && name[len - 1] == '\n')
-		len--;
-
-	mutex_lock(&iio_trigger_list_lock);
-	list_for_each_entry(trig, &iio_trigger_list, list) {
-		if (strncmp(trig->name, name, len) == 0) {
-			found = true;
-			break;
-		}
-	}
-	mutex_unlock(&iio_trigger_list_lock);
-
-	return found ? trig : NULL;
-}
-EXPORT_SYMBOL(iio_trigger_find_by_name);
-
-void iio_trigger_poll(struct iio_trigger *trig, s64 time)
-{
-	struct iio_poll_func *pf_cursor;
-
-	list_for_each_entry(pf_cursor, &trig->pollfunc_list, list) {
-		if (pf_cursor->poll_func_immediate) {
-			pf_cursor->poll_func_immediate(pf_cursor->private_data);
-			trig->use_count++;
-		}
-	}
-	list_for_each_entry(pf_cursor, &trig->pollfunc_list, list) {
-		if (pf_cursor->poll_func_main) {
-			pf_cursor->poll_func_main(pf_cursor->private_data,
-						  time);
-			trig->use_count++;
-		}
-	}
-}
-EXPORT_SYMBOL(iio_trigger_poll);
-
-void iio_trigger_notify_done(struct iio_trigger *trig)
-{
-	trig->use_count--;
-	if (trig->use_count == 0 && trig->try_reenable)
-		if (trig->try_reenable(trig)) {
-			/* Missed and interrupt so launch new poll now */
-			iio_trigger_poll(trig, 0);
-		}
-}
-EXPORT_SYMBOL(iio_trigger_notify_done);
-
-/**
- * iio_trigger_read_name() - retrieve useful identifying name
- **/
-ssize_t iio_trigger_read_name(struct device *dev,
-			      struct device_attribute *attr,
-			      char *buf)
-{
-	struct iio_trigger *trig = dev_get_drvdata(dev);
-	return sprintf(buf, "%s\n", trig->name);
-}
-EXPORT_SYMBOL(iio_trigger_read_name);
-
-/* Trigger Consumer related functions */
-
-/* Complexity in here.  With certain triggers (datardy) an acknowledgement
- * may be needed if the pollfuncs do not include the data read for the
- * triggering device.
- * This is not currently handled.  Alternative of not enabling trigger unless
- * the relevant function is in there may be the best option.
- */
-/* Worth protecting against double additions?*/
-int iio_trigger_attach_poll_func(struct iio_trigger *trig,
-				 struct iio_poll_func *pf)
-{
-	int ret = 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(&trig->pollfunc_list_lock, flags);
-	list_add_tail(&pf->list, &trig->pollfunc_list);
-	spin_unlock_irqrestore(&trig->pollfunc_list_lock, flags);
-
-	if (trig->set_trigger_state)
-		ret = trig->set_trigger_state(trig, true);
-	if (ret) {
-		printk(KERN_ERR "set trigger state failed\n");
-		list_del(&pf->list);
-	}
-	return ret;
-}
-EXPORT_SYMBOL(iio_trigger_attach_poll_func);
-
-int iio_trigger_dettach_poll_func(struct iio_trigger *trig,
-				  struct iio_poll_func *pf)
-{
-	struct iio_poll_func *pf_cursor;
-	unsigned long flags;
-	int ret = -EINVAL;
-
-	spin_lock_irqsave(&trig->pollfunc_list_lock, flags);
-	list_for_each_entry(pf_cursor, &trig->pollfunc_list, list)
-		if (pf_cursor == pf) {
-			ret = 0;
-			break;
-		}
-	if (!ret) {
-		if (list_is_singular(&trig->pollfunc_list)
-		    && trig->set_trigger_state) {
-			spin_unlock_irqrestore(&trig->pollfunc_list_lock,
-					       flags);
-			/* May sleep hence cannot hold the spin lock */
-			ret = trig->set_trigger_state(trig, false);
-			if (ret)
-				goto error_ret;
-			spin_lock_irqsave(&trig->pollfunc_list_lock, flags);
-		}
-		/*
-		 * Now we can delete safe in the knowledge that, if this is
-		 * the last pollfunc then we have disabled the trigger anyway
-		 * and so nothing should be able to call the pollfunc.
-		 */
-		list_del(&pf_cursor->list);
-	}
-	spin_unlock_irqrestore(&trig->pollfunc_list_lock, flags);
-
-error_ret:
-	return ret;
-}
-EXPORT_SYMBOL(iio_trigger_dettach_poll_func);
-
-/**
- * iio_trigger_read_currrent() - trigger consumer sysfs query which trigger
- *
- * For trigger consumers the current_trigger interface allows the trigger
- * used by the device to be queried.
- **/
-static ssize_t iio_trigger_read_current(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	int len = 0;
-	if (dev_info->trig)
-		len = sprintf(buf,
-			      "%s\n",
-			      dev_info->trig->name);
-	return len;
-}
-
-/**
- * iio_trigger_write_current() trigger consumer sysfs set current trigger
- *
- * For trigger consumers the current_trigger interface allows the trigger
- * used for this device to be specified at run time based on the triggers
- * name.
- **/
-static ssize_t iio_trigger_write_current(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf,
-					 size_t len)
-{
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct iio_trigger *oldtrig = dev_info->trig;
-	mutex_lock(&dev_info->mlock);
-	if (dev_info->currentmode == INDIO_RING_TRIGGERED) {
-		mutex_unlock(&dev_info->mlock);
-		return -EBUSY;
-	}
-	mutex_unlock(&dev_info->mlock);
-
-	dev_info->trig = iio_trigger_find_by_name(buf, len);
-	if (oldtrig && dev_info->trig != oldtrig)
-		iio_put_trigger(oldtrig);
-	if (dev_info->trig)
-		iio_get_trigger(dev_info->trig);
-
-	return len;
-}
-
-static DEVICE_ATTR(current_trigger, S_IRUGO | S_IWUSR,
-		   iio_trigger_read_current,
-		   iio_trigger_write_current);
-
-static struct attribute *iio_trigger_consumer_attrs[] = {
-	&dev_attr_current_trigger.attr,
-	NULL,
-};
-
-static const struct attribute_group iio_trigger_consumer_attr_group = {
-	.name = "trigger",
-	.attrs = iio_trigger_consumer_attrs,
-};
-
-static void iio_trig_release(struct device *device)
-{
-	struct iio_trigger *trig = to_iio_trigger(device);
-	kfree(trig);
-	iio_put();
-}
-
-static struct device_type iio_trig_type = {
-	.release = iio_trig_release,
-};
-
-struct iio_trigger *iio_allocate_trigger(void)
-{
-	struct iio_trigger *trig;
-	trig = kzalloc(sizeof *trig, GFP_KERNEL);
-	if (trig) {
-		trig->dev.type = &iio_trig_type;
-		trig->dev.bus = &iio_bus_type;
-		device_initialize(&trig->dev);
-		dev_set_drvdata(&trig->dev, (void *)trig);
-		spin_lock_init(&trig->pollfunc_list_lock);
-		INIT_LIST_HEAD(&trig->list);
-		INIT_LIST_HEAD(&trig->pollfunc_list);
-		iio_get();
-	}
-	return trig;
-}
-EXPORT_SYMBOL(iio_allocate_trigger);
-
-void iio_free_trigger(struct iio_trigger *trig)
-{
-	if (trig)
-		put_device(&trig->dev);
-}
-EXPORT_SYMBOL(iio_free_trigger);
-
-int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
-{
-	int ret;
-	ret = sysfs_create_group(&dev_info->dev.kobj,
-				 &iio_trigger_consumer_attr_group);
-	return ret;
-}
-EXPORT_SYMBOL(iio_device_register_trigger_consumer);
-
-int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
-{
-	sysfs_remove_group(&dev_info->dev.kobj,
-			   &iio_trigger_consumer_attr_group);
-	return 0;
-}
-EXPORT_SYMBOL(iio_device_unregister_trigger_consumer);
-
-int iio_alloc_pollfunc(struct iio_dev *indio_dev,
-		       void (*immediate)(struct iio_dev *indio_dev),
-		       void (*main)(struct iio_dev *private_data, s64 time))
-{
-	indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL);
-	if (indio_dev->pollfunc == NULL)
-		return -ENOMEM;
-	indio_dev->pollfunc->poll_func_immediate = immediate;
-	indio_dev->pollfunc->poll_func_main = main;
-	indio_dev->pollfunc->private_data = indio_dev;
-	return 0;
-}
-EXPORT_SYMBOL(iio_alloc_pollfunc);
-
-int iio_triggered_ring_postenable(struct iio_dev *indio_dev)
-{
-	return indio_dev->trig
-		? iio_trigger_attach_poll_func(indio_dev->trig,
-					       indio_dev->pollfunc)
-		: 0;
-}
-EXPORT_SYMBOL(iio_triggered_ring_postenable);
-
-int iio_triggered_ring_predisable(struct iio_dev *indio_dev)
-{
-	return indio_dev->trig
-		? iio_trigger_dettach_poll_func(indio_dev->trig,
-						indio_dev->pollfunc)
-		: 0;
-}
-EXPORT_SYMBOL(iio_triggered_ring_predisable);