Release 4.7 drivers/iio/trigger/iio-trig-sysfs.c

Directory: drivers/iio/trigger
/*
 * Copyright 2011 Analog Devices Inc.
 *
 * Licensed under the GPL-2.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/irq_work.h>

#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>


struct iio_sysfs_trig {
	
struct iio_trigger *trig;
	
struct irq_work work;
	
int id;
	
struct list_head l;
};

static LIST_HEAD(iio_sysfs_trig_list);
static DEFINE_MUTEX(iio_sysfs_trig_list_mut);

static int iio_sysfs_trigger_probe(int id);


static ssize_t iio_sysfs_trig_add(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf,
				  size_t len)
{
	int ret;
	unsigned long input;

	ret = kstrtoul(buf, 10, &input);
	if (ret)
		return ret;
	ret = iio_sysfs_trigger_probe(input);
	if (ret)
		return ret;
	return len;
}
Contributors
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jonathan cameron jonathan cameron 66 98.51% 1 50.00%
jingoo han jingoo han 1 1.49% 1 50.00%
Total 67 100.00% 2 100.00%


static DEVICE_ATTR(add_trigger, S_IWUSR, NULL, &iio_sysfs_trig_add);

static int iio_sysfs_trigger_remove(int id);


static ssize_t iio_sysfs_trig_remove(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf,
				     size_t len)
{
	int ret;
	unsigned long input;

	ret = kstrtoul(buf, 10, &input);
	if (ret)
		return ret;
	ret = iio_sysfs_trigger_remove(input);
	if (ret)
		return ret;
	return len;
}

Contributors
Person Tokens Prop Commits CommitProp
jonathan cameron jonathan cameron 66 98.51% 1 50.00%
jingoo han jingoo han 1 1.49% 1 50.00%
Total 67 100.00% 2 100.00%


static DEVICE_ATTR(remove_trigger, S_IWUSR, NULL, &iio_sysfs_trig_remove);


static struct attribute *iio_sysfs_trig_attrs[] = {
	&dev_attr_add_trigger.attr,
	&dev_attr_remove_trigger.attr,
	NULL,
};


static const struct attribute_group iio_sysfs_trig_group = {
	.attrs = iio_sysfs_trig_attrs,
};


static const struct attribute_group *iio_sysfs_trig_groups[] = {
	&iio_sysfs_trig_group,
	NULL
};


/* Nothing to actually do upon release */


static void iio_trigger_sysfs_release(struct device *dev)
{
}

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jonathan cameron jonathan cameron 10 100.00% 1 100.00%
Total 10 100.00% 1 100.00%


static struct device iio_sysfs_trig_dev = {
	.bus = &iio_bus_type,
	.groups = iio_sysfs_trig_groups,
	.release = &iio_trigger_sysfs_release,
};



static void iio_sysfs_trigger_work(struct irq_work *work)
{
	struct iio_sysfs_trig *trig = container_of(work, struct iio_sysfs_trig,
							work);

	iio_trigger_poll(trig->trig);
}

Contributors
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lars-peter clausen lars-peter clausen 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static ssize_t iio_sysfs_trigger_poll(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct iio_trigger *trig = to_iio_trigger(dev);
	struct iio_sysfs_trig *sysfs_trig = iio_trigger_get_drvdata(trig);

	irq_work_queue(&sysfs_trig->work);

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
michael hennerich michael hennerich 39 70.91% 1 25.00%
lars-peter clausen lars-peter clausen 16 29.09% 3 75.00%
Total 55 100.00% 4 100.00%

static DEVICE_ATTR(trigger_now, S_IWUSR, NULL, iio_sysfs_trigger_poll);


static struct attribute *iio_sysfs_trigger_attrs[] = {
	&dev_attr_trigger_now.attr,
	NULL,
};


static const struct attribute_group iio_sysfs_trigger_attr_group = {
	.attrs = iio_sysfs_trigger_attrs,
};


static const struct attribute_group *iio_sysfs_trigger_attr_groups[] = {
	&iio_sysfs_trigger_attr_group,
	NULL
};


static const struct iio_trigger_ops iio_sysfs_trigger_ops = {
	.owner = THIS_MODULE,
};



static int iio_sysfs_trigger_probe(int id)
{
	struct iio_sysfs_trig *t;
	int ret;
	bool foundit = false;

	mutex_lock(&iio_sysfs_trig_list_mut);
	list_for_each_entry(t, &iio_sysfs_trig_list, l)
		if (id == t->id) {
			foundit = true;
			break;
		}
	if (foundit) {
		ret = -EINVAL;
		goto out1;
	}
	t = kmalloc(sizeof(*t), GFP_KERNEL);
	if (t == NULL) {
		ret = -ENOMEM;
		goto out1;
	}
	t->id = id;
	t->trig = iio_trigger_alloc("sysfstrig%d", id);
	if (!t->trig) {
		ret = -ENOMEM;
		goto free_t;
	}

	t->trig->dev.groups = iio_sysfs_trigger_attr_groups;
	t->trig->ops = &iio_sysfs_trigger_ops;
	t->trig->dev.parent = &iio_sysfs_trig_dev;
	iio_trigger_set_drvdata(t->trig, t);

	init_irq_work(&t->work, iio_sysfs_trigger_work);

	ret = iio_trigger_register(t->trig);
	if (ret)
		goto out2;
	list_add(&t->l, &iio_sysfs_trig_list);
	__module_get(THIS_MODULE);
	mutex_unlock(&iio_sysfs_trig_list_mut);
	return 0;

out2:
	iio_trigger_put(t->trig);
free_t:
	kfree(t);
out1:
	mutex_unlock(&iio_sysfs_trig_list_mut);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
jonathan cameron jonathan cameron 160 65.31% 3 37.50%
michael hennerich michael hennerich 61 24.90% 1 12.50%
lars-peter clausen lars-peter clausen 21 8.57% 3 37.50%
denis ciocca denis ciocca 3 1.22% 1 12.50%
Total 245 100.00% 8 100.00%



static int iio_sysfs_trigger_remove(int id)
{
	bool foundit = false;
	struct iio_sysfs_trig *t;

	mutex_lock(&iio_sysfs_trig_list_mut);
	list_for_each_entry(t, &iio_sysfs_trig_list, l)
		if (id == t->id) {
			foundit = true;
			break;
		}
	if (!foundit) {
		mutex_unlock(&iio_sysfs_trig_list_mut);
		return -EINVAL;
	}

	iio_trigger_unregister(t->trig);
	iio_trigger_free(t->trig);

	list_del(&t->l);
	kfree(t);
	module_put(THIS_MODULE);
	mutex_unlock(&iio_sysfs_trig_list_mut);
	return 0;
}


Contributors
Person Tokens Prop Commits CommitProp
jonathan cameron jonathan cameron 79 74.53% 1 25.00%
michael hennerich michael hennerich 23 21.70% 1 25.00%
denis ciocca denis ciocca 3 2.83% 1 25.00%
lars-peter clausen lars-peter clausen 1 0.94% 1 25.00%
Total 106 100.00% 4 100.00%



static int __init iio_sysfs_trig_init(void)
{
	device_initialize(&iio_sysfs_trig_dev);
	dev_set_name(&iio_sysfs_trig_dev, "iio_sysfs_trigger");
	return device_add(&iio_sysfs_trig_dev);
}
Contributors
Person Tokens Prop Commits CommitProp
jonathan cameron jonathan cameron 16 53.33% 1 50.00%
michael hennerich michael hennerich 14 46.67% 1 50.00%
Total 30 100.00% 2 100.00%


module_init(iio_sysfs_trig_init);



static void __exit iio_sysfs_trig_exit(void)
{
	device_unregister(&iio_sysfs_trig_dev);
}
Contributors
Person Tokens Prop Commits CommitProp
michael hennerich michael hennerich 13 86.67% 1 50.00%
jonathan cameron jonathan cameron 2 13.33% 1 50.00%
Total 15 100.00% 2 100.00%


module_exit(iio_sysfs_trig_exit);

MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Sysfs based trigger for the iio subsystem");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:iio-trig-sysfs");
Overall Contributors
Person Tokens Prop Commits CommitProp
jonathan cameron jonathan cameron 576 63.93% 5 41.67%
michael hennerich michael hennerich 238 26.42% 1 8.33%
lars-peter clausen lars-peter clausen 78 8.66% 4 33.33%
denis ciocca denis ciocca 7 0.78% 1 8.33%
jingoo han jingoo han 2 0.22% 1 8.33%
Total 901 100.00% 12 100.00%
  Directory: drivers/iio/trigger

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
jonathan cameron	jonathan cameron	66	98.51%	1	50.00%
jingoo han	jingoo han	1	1.49%	1	50.00%
	Total	67	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/iio/trigger/iio-trig-sysfs.c

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