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| author | Karl Hiramoto <karl@hiramoto.org> | 2010-07-08 20:55:32 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-09 00:09:21 -0700 |
| commit | c69fb76e8f53b36b81fd7c8a1ed251aaf6bb0386 (patch) | |
| tree | 73808e42a51273fec5034892237a3c374417fa5f | |
| parent | 005066122b58f3b350736cc896af46aea2e32d23 (diff) | |
| download | linux-c69fb76e8f53b36b81fd7c8a1ed251aaf6bb0386.tar.bz2 | |
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>
| -rw-r--r-- | drivers/atm/adummy.c | 39 |
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 { 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; |