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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-11 22:41:48 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-11 22:41:48 +0200
commit41a2a4665d401f79912a3da83ff9ef3e502bc12e (patch)
treec1183d82f60df38205921e293a022d47d90268b2 /drivers/acpi
parent75eb2d13acca49c3c4f1c96fb04d6c9fd6013e78 (diff)
downloadvexpress-lsk-41a2a4665d401f79912a3da83ff9ef3e502bc12e.tar.gz
ACPI / PM: Expose lists of device wakeup power resources to user space
Commit 18a3870 (ACPI / PM: Expose lists of device power resources to user space) exposed the lists of ACPI power resources associated with power states of ACPI devices, but it didn't expose the lists of ACPI wakeup power resources, which also is necessary to get the full picture of dependencies between ACPI devices and power resources. For this reason, for every ACPI device node having a list of ACPI wakeup power resources associated with it, expose that list to user space in analogy with commit 18a3870. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/power.c58
1 files changed, 39 insertions, 19 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 34f5ef11d42..0e3f57674fd 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -459,57 +459,79 @@ static struct attribute_group attr_groups[] = {
},
};
-static void acpi_power_hide_list(struct acpi_device *adev, int state)
+static struct attribute_group wakeup_attr_group = {
+ .name = "power_resources_wakeup",
+ .attrs = attrs,
+};
+
+static void acpi_power_hide_list(struct acpi_device *adev,
+ struct list_head *resources,
+ struct attribute_group *attr_group)
{
- struct acpi_device_power_state *ps = &adev->power.states[state];
struct acpi_power_resource_entry *entry;
- if (list_empty(&ps->resources))
+ if (list_empty(resources))
return;
- list_for_each_entry_reverse(entry, &ps->resources, node) {
+ list_for_each_entry_reverse(entry, resources, node) {
struct acpi_device *res_dev = &entry->resource->device;
sysfs_remove_link_from_group(&adev->dev.kobj,
- attr_groups[state].name,
+ attr_group->name,
dev_name(&res_dev->dev));
}
- sysfs_remove_group(&adev->dev.kobj, &attr_groups[state]);
+ sysfs_remove_group(&adev->dev.kobj, attr_group);
}
-static void acpi_power_expose_list(struct acpi_device *adev, int state)
+static void acpi_power_expose_list(struct acpi_device *adev,
+ struct list_head *resources,
+ struct attribute_group *attr_group)
{
- struct acpi_device_power_state *ps = &adev->power.states[state];
struct acpi_power_resource_entry *entry;
int ret;
- if (list_empty(&ps->resources))
+ if (list_empty(resources))
return;
- ret = sysfs_create_group(&adev->dev.kobj, &attr_groups[state]);
+ ret = sysfs_create_group(&adev->dev.kobj, attr_group);
if (ret)
return;
- list_for_each_entry(entry, &ps->resources, node) {
+ list_for_each_entry(entry, resources, node) {
struct acpi_device *res_dev = &entry->resource->device;
ret = sysfs_add_link_to_group(&adev->dev.kobj,
- attr_groups[state].name,
+ attr_group->name,
&res_dev->dev.kobj,
dev_name(&res_dev->dev));
if (ret) {
- acpi_power_hide_list(adev, state);
+ acpi_power_hide_list(adev, resources, attr_group);
break;
}
}
}
+static void acpi_power_expose_hide(struct acpi_device *adev,
+ struct list_head *resources,
+ struct attribute_group *attr_group,
+ bool expose)
+{
+ if (expose)
+ acpi_power_expose_list(adev, resources, attr_group);
+ else
+ acpi_power_hide_list(adev, resources, attr_group);
+}
+
void acpi_power_add_remove_device(struct acpi_device *adev, bool add)
{
struct acpi_device_power_state *ps;
struct acpi_power_resource_entry *entry;
int state;
+ if (adev->wakeup.flags.valid)
+ acpi_power_expose_hide(adev, &adev->wakeup.resources,
+ &wakeup_attr_group, add);
+
if (!adev->power.flags.power_resources)
return;
@@ -523,12 +545,10 @@ void acpi_power_add_remove_device(struct acpi_device *adev, bool add)
acpi_power_remove_dependent(resource, adev);
}
- for (state = ACPI_STATE_D0; state <= ACPI_STATE_D3_HOT; state++) {
- if (add)
- acpi_power_expose_list(adev, state);
- else
- acpi_power_hide_list(adev, state);
- }
+ for (state = ACPI_STATE_D0; state <= ACPI_STATE_D3_HOT; state++)
+ acpi_power_expose_hide(adev,
+ &adev->power.states[state].resources,
+ &attr_groups[state], add);
}
int acpi_power_wakeup_list_init(struct list_head *list, int *system_level_p)