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add a 'location' attribute to sysfs (dahdi_device):

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* Our user-space previously used the implicit location from the sysfs
  device path of the "dahdi_device".
* However:
  - Sysfs paths are very limited in length.
  - Low-level driver need more control on the location field.
  - For example, it need to be persistant for span_assignments.
* We now export explicitly the 'location' field which is managed by
  low-level drivers.
* We will use this field as the location in span_assignments.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
This commit is contained in:
Oron Peled
2013-09-29 10:04:32 +02:00
committed by Tzafrir Cohen
parent 2bd36a3307
commit d4c8eb47ac
1 changed files with 11 additions and 0 deletions
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11
drivers/dahdi/dahdi-sysfs.c
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@@ -402,6 +402,16 @@ dahdi_device_hardware_id_show(struct device *dev,
(ddev->hardware_id) ? ddev->hardware_id : "");
}
static ssize_t
dahdi_device_location_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dahdi_device *ddev = to_ddev(dev);
return sprintf(buf, "%s\n",
(ddev->location) ? ddev->location : "");
}
static ssize_t
dahdi_device_auto_assign(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
@@ -549,6 +559,7 @@ static struct device_attribute dahdi_device_attrs[] = {
__ATTR(type, S_IRUGO, dahdi_device_type_show, NULL),
__ATTR(span_count, S_IRUGO, dahdi_device_span_count_show, NULL),
__ATTR(hardware_id, S_IRUGO, dahdi_device_hardware_id_show, NULL),
__ATTR(location, S_IRUGO, dahdi_device_location_show, NULL),
__ATTR(auto_assign, S_IWUSR, NULL, dahdi_device_auto_assign),
__ATTR(assign_span, S_IWUSR, NULL, dahdi_device_assign_span),
__ATTR(unassign_span, S_IWUSR, NULL, dahdi_device_unassign_span),