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authorKarl Hiramoto <karl@hiramoto.org>2010-07-08 16:55:32 -0400
committerDavid S. Miller <davem@davemloft.net>2010-07-09 03:09:21 -0400
commitc69fb76e8f53b36b81fd7c8a1ed251aaf6bb0386 (patch)
tree73808e42a51273fec5034892237a3c374417fa5f /drivers/atm
parent005066122b58f3b350736cc896af46aea2e32d23 (diff)
atm/adummy: add syfs DEVICE_ATTR to change signal
Signed-off-by: Karl Hiramoto <karl@hiramoto.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/atm')
-rw-r--r--drivers/atm/adummy.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/atm/adummy.c b/drivers/atm/adummy.c
index 6d44f07b69f8..46b94762125b 100644
--- a/drivers/atm/adummy.c
+++ b/drivers/atm/adummy.c
@@ -40,6 +40,42 @@ struct adummy_dev {
40 40
41static LIST_HEAD(adummy_devs); 41static LIST_HEAD(adummy_devs);
42 42
43static ssize_t __set_signal(struct device *dev,
44 struct device_attribute *attr,
45 const char *buf, size_t len)
46{
47 struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);
48 int signal;
49
50 if (sscanf(buf, "%d", &signal) == 1) {
51
52 if (signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND)
53 signal = ATM_PHY_SIG_UNKNOWN;
54
55 atm_dev_signal_change(atm_dev, signal);
56 return 1;
57 }
58 return -EINVAL;
59}
60
61static ssize_t __show_signal(struct device *dev,
62 struct device_attribute *attr, char *buf)
63{
64 struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev);
65 return sprintf(buf, "%d\n", atm_dev->signal);
66}
67static DEVICE_ATTR(signal, 0644, __show_signal, __set_signal);
68
69static struct attribute *adummy_attrs[] = {
70 &dev_attr_signal.attr,
71 NULL
72};
73
74static struct attribute_group adummy_group_attrs = {
75 .name = NULL, /* We want them in dev's root folder */
76 .attrs = adummy_attrs
77};
78
43static int __init 79static int __init
44adummy_start(struct atm_dev *dev) 80adummy_start(struct atm_dev *dev)
45{ 81{
@@ -128,6 +164,9 @@ static int __init adummy_init(void)
128 adummy_dev->atm_dev = atm_dev; 164 adummy_dev->atm_dev = atm_dev;
129 atm_dev->dev_data = adummy_dev; 165 atm_dev->dev_data = adummy_dev;
130 166
167 if (sysfs_create_group(&atm_dev->class_dev.kobj, &adummy_group_attrs))
168 dev_err(&atm_dev->class_dev, "Could not register attrs for adummy\n");
169
131 if (adummy_start(atm_dev)) { 170 if (adummy_start(atm_dev)) {
132 printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n"); 171 printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
133 err = -ENODEV; 172 err = -ENODEV;