Commit c69fb76e authored by Karl Hiramoto's avatar Karl Hiramoto Committed by David S. Miller
Browse files

atm/adummy: add syfs DEVICE_ATTR to change signal 



Signed-off-by: default avatarKarl Hiramoto <karl@hiramoto.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 00506612

drivers/atm/adummy.c

+39 −0
Original line number Diff line number Diff line
@@ -40,6 +40,42 @@ struct adummy_dev { 


static LIST_HEAD(adummy_devs);



static ssize_t __set_signal(struct device *dev,

		struct device_attribute *attr,

		const char *buf, size_t len)

{

	struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);

	int signal;



	if (sscanf(buf, "%d", &signal) == 1) {



		if (signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND)

			signal = ATM_PHY_SIG_UNKNOWN;



		atm_dev_signal_change(atm_dev, signal);

		return 1;

	}

	return -EINVAL;

}



static ssize_t __show_signal(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);

	return sprintf(buf, "%d\n", atm_dev->signal);

}

static DEVICE_ATTR(signal, 0644, __show_signal, __set_signal);



static struct attribute *adummy_attrs[] = {

	&dev_attr_signal.attr,

	NULL

};



static struct attribute_group adummy_group_attrs = {

	.name = NULL, /* We want them in dev's root folder */

	.attrs = adummy_attrs

};



static int __init

adummy_start(struct atm_dev *dev)

{
@@ -128,6 +164,9 @@ static int __init adummy_init(void) 
	adummy_dev->atm_dev = atm_dev;

	atm_dev->dev_data = adummy_dev;



	if (sysfs_create_group(&atm_dev->class_dev.kobj, &adummy_group_attrs))

		dev_err(&atm_dev->class_dev, "Could not register attrs for adummy\n");



	if (adummy_start(atm_dev)) {

		printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");

		err = -ENODEV;