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xpp: new xbus attribute: dahdi_registration

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XPP devices have implicit support for device registration and
unregistration. Even though it is only used for the legacy (non-hotplug)
configuration case, we still prefer to make it explicit.

This attribute would later allow a simpler implementation of the user
space (xpp-specific) tool dahdi_registration.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
This commit is contained in:
Oron Peled
2014-03-17 12:35:39 -04:00
committed by Tzafrir Cohen
parent 606dd58a47
commit 193c9e59a8
1 changed files with 39 additions and 0 deletions
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39
drivers/dahdi/xpp/xbus-sysfs.c
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@@ -302,6 +302,42 @@ field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
xbus_attr(connector, "%s\n");
xbus_attr(label, "%s\n");
static DEVICE_ATTR_WRITER(dahdi_registration_store, dev, buf, count)
{
xbus_t *xbus;
int dahdi_reg;
int ret;
xbus = dev_to_xbus(dev);
if (!xbus)
return -ENODEV;
ret = sscanf(buf, "%d", &dahdi_reg);
if (ret != 1)
return -EINVAL;
if (dahdi_reg) {
ret = xbus_register_dahdi_device(xbus);
if (ret < 0) {
XBUS_ERR(xbus,
"xbus_register_dahdi_device() failed (ret = %d)\n",
ret);
return ret;
}
} else {
xbus_unregister_dahdi_device(xbus);
}
return count;
}
static DEVICE_ATTR_READER(dahdi_registration_show, dev, buf)
{
xbus_t *xbus;
int len;
xbus = dev_to_xbus(dev);
len = sprintf(buf, "%d\n", xbus_is_registered(xbus));
return len;
}
static struct device_attribute xbus_dev_attrs[] = {
__ATTR_RO(connector),
__ATTR_RO(label),
@@ -316,6 +352,9 @@ static struct device_attribute xbus_dev_attrs[] = {
#ifdef SAMPLE_TICKS
__ATTR(samples, S_IWUSR | S_IRUGO, samples_show, samples_store),
#endif
__ATTR(dahdi_registration, S_IRUGO | S_IWUSR,
dahdi_registration_show,
dahdi_registration_store),
__ATTR_NULL,
};