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-rw-r--r--drivers/acpi/internal.h13
-rw-r--r--drivers/acpi/power.c157
-rw-r--r--drivers/acpi/scan.c47
3 files changed, 102 insertions, 115 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index b79b4258bd6b..ce6cb24de8c7 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -35,9 +35,22 @@ static inline void acpi_debugfs_init(void) { return; }
#endif
/* --------------------------------------------------------------------------
+ Device Node Initialization / Removal
+ -------------------------------------------------------------------------- */
+#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
+ ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
+
+int acpi_device_register(struct acpi_device *device,
+ void (*release)(struct device *));
+void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
+ int type, unsigned long long sta);
+void acpi_free_ids(struct acpi_device *device);
+
+/* --------------------------------------------------------------------------
Power Resource
-------------------------------------------------------------------------- */
int acpi_power_init(void);
+void acpi_add_power_resource(acpi_handle handle);
void acpi_power_add_remove_device(struct acpi_device *adev, bool add);
int acpi_device_sleep_wake(struct acpi_device *dev,
int enable, int sleep_state, int dev_state);
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 659386c4f0cb..b12933fd2e56 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -58,8 +58,7 @@ ACPI_MODULE_NAME("power");
#define ACPI_POWER_RESOURCE_STATE_ON 0x01
#define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
-static int acpi_power_add(struct acpi_device *device);
-static int acpi_power_remove(struct acpi_device *device, int type);
+static inline int acpi_power_add(struct acpi_device *device) { return 0; }
static const struct acpi_device_id power_device_ids[] = {
{ACPI_POWER_HID, 0},
@@ -76,10 +75,7 @@ static struct acpi_driver acpi_power_driver = {
.name = "power",
.class = ACPI_POWER_CLASS,
.ids = power_device_ids,
- .ops = {
- .add = acpi_power_add,
- .remove = acpi_power_remove,
- },
+ .ops.add = acpi_power_add,
.drv.pm = &acpi_power_pm,
};
@@ -90,9 +86,9 @@ struct acpi_power_dependent_device {
};
struct acpi_power_resource {
- struct acpi_device *device;
+ struct acpi_device device;
struct list_head dependent;
- acpi_bus_id name;
+ char *name;
u32 system_level;
u32 order;
unsigned int ref_count;
@@ -105,28 +101,14 @@ static struct list_head acpi_power_resource_list;
Power Resource Management
-------------------------------------------------------------------------- */
-static int
-acpi_power_get_context(acpi_handle handle,
- struct acpi_power_resource **resource)
+static struct acpi_power_resource *acpi_power_get_context(acpi_handle handle)
{
- int result = 0;
- struct acpi_device *device = NULL;
-
-
- if (!resource)
- return -ENODEV;
-
- result = acpi_bus_get_device(handle, &device);
- if (result) {
- printk(KERN_WARNING PREFIX "Getting context [%p]\n", handle);
- return result;
- }
+ struct acpi_device *device;
- *resource = acpi_driver_data(device);
- if (!*resource)
- return -ENODEV;
+ if (acpi_bus_get_device(handle, &device))
+ return NULL;
- return 0;
+ return container_of(device, struct acpi_power_resource, device);
}
static int acpi_power_get_state(acpi_handle handle, int *state)
@@ -171,9 +153,9 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
acpi_handle handle = list->handles[i];
int result;
- result = acpi_power_get_context(handle, &resource);
- if (result)
- return result;
+ resource = acpi_power_get_context(handle);
+ if (!resource)
+ return -ENODEV;
mutex_lock(&resource->resource_lock);
@@ -226,12 +208,12 @@ static int __acpi_power_on(struct acpi_power_resource *resource)
{
acpi_status status = AE_OK;
- status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL);
+ status = acpi_evaluate_object(resource->device.handle, "_ON", NULL, NULL);
if (ACPI_FAILURE(status))
return -ENODEV;
/* Update the power resource's _device_ power state */
- resource->device->power.state = ACPI_STATE_D0;
+ resource->device.power.state = ACPI_STATE_D0;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n",
resource->name));
@@ -242,11 +224,11 @@ static int __acpi_power_on(struct acpi_power_resource *resource)
static int acpi_power_on(acpi_handle handle)
{
int result = 0;
- struct acpi_power_resource *resource = NULL;
+ struct acpi_power_resource *resource;
- result = acpi_power_get_context(handle, &resource);
- if (result)
- return result;
+ resource = acpi_power_get_context(handle);
+ if (!resource)
+ return -ENODEV;
mutex_lock(&resource->resource_lock);
@@ -275,11 +257,11 @@ static int acpi_power_off(acpi_handle handle)
{
int result = 0;
acpi_status status = AE_OK;
- struct acpi_power_resource *resource = NULL;
+ struct acpi_power_resource *resource;
- result = acpi_power_get_context(handle, &resource);
- if (result)
- return result;
+ resource = acpi_power_get_context(handle);
+ if (!resource)
+ return -ENODEV;
mutex_lock(&resource->resource_lock);
@@ -297,12 +279,12 @@ static int acpi_power_off(acpi_handle handle)
goto unlock;
}
- status = acpi_evaluate_object(resource->device->handle, "_OFF", NULL, NULL);
+ status = acpi_evaluate_object(resource->device.handle, "_OFF", NULL, NULL);
if (ACPI_FAILURE(status)) {
result = -ENODEV;
} else {
/* Update the power resource's _device_ power state */
- resource->device->power.state = ACPI_STATE_D3;
+ resource->device.power.state = ACPI_STATE_D3;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Power resource [%s] turned off\n",
@@ -350,7 +332,11 @@ static void acpi_power_add_dependent(acpi_handle rhandle,
struct acpi_power_dependent_device *dep;
struct acpi_power_resource *resource;
- if (!rhandle || !adev || acpi_power_get_context(rhandle, &resource))
+ if (!rhandle || !adev)
+ return;
+
+ resource = acpi_power_get_context(rhandle);
+ if (!resource)
return;
mutex_lock(&resource->resource_lock);
@@ -378,7 +364,11 @@ static void acpi_power_remove_dependent(acpi_handle rhandle,
struct acpi_power_resource *resource;
struct work_struct *work = NULL;
- if (!rhandle || !adev || acpi_power_get_context(rhandle, &resource))
+ if (!rhandle || !adev)
+ return;
+
+ resource = acpi_power_get_context(rhandle);
+ if (!resource)
return;
mutex_lock(&resource->resource_lock);
@@ -648,46 +638,53 @@ int acpi_power_transition(struct acpi_device *device, int state)
return result;
}
-/* --------------------------------------------------------------------------
- Driver Interface
- -------------------------------------------------------------------------- */
+static void acpi_release_power_resource(struct device *dev)
+{
+ struct acpi_device *device = to_acpi_device(dev);
+ struct acpi_power_resource *resource;
+
+ acpi_free_ids(device);
+ resource = container_of(device, struct acpi_power_resource, device);
+ kfree(resource);
+}
-static int acpi_power_add(struct acpi_device *device)
+void acpi_add_power_resource(acpi_handle handle)
{
- int result = 0, state;
- acpi_status status = AE_OK;
- struct acpi_power_resource *resource = NULL;
+ struct acpi_power_resource *resource;
+ struct acpi_device *device = NULL;
union acpi_object acpi_object;
struct acpi_buffer buffer = { sizeof(acpi_object), &acpi_object };
+ acpi_status status;
+ int state, result = -ENODEV;
+ acpi_bus_get_device(handle, &device);
+ if (device)
+ return;
- if (!device)
- return -EINVAL;
-
- resource = kzalloc(sizeof(struct acpi_power_resource), GFP_KERNEL);
+ resource = kzalloc(sizeof(*resource), GFP_KERNEL);
if (!resource)
- return -ENOMEM;
+ return;
- resource->device = device;
+ device = &resource->device;
+ acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER,
+ ACPI_STA_DEFAULT);
mutex_init(&resource->resource_lock);
INIT_LIST_HEAD(&resource->dependent);
- strcpy(resource->name, device->pnp.bus_id);
+ resource->name = device->pnp.bus_id;
strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
- device->driver_data = resource;
/* Evalute the object to get the system level and resource order. */
- status = acpi_evaluate_object(device->handle, NULL, NULL, &buffer);
- if (ACPI_FAILURE(status)) {
- result = -ENODEV;
- goto end;
- }
+ status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
+ if (ACPI_FAILURE(status))
+ goto out;
+
resource->system_level = acpi_object.power_resource.system_level;
resource->order = acpi_object.power_resource.resource_order;
- result = acpi_power_get_state(device->handle, &state);
+ result = acpi_power_get_state(handle, &state);
if (result)
- goto end;
+ goto out;
switch (state) {
case ACPI_POWER_RESOURCE_STATE_ON:
@@ -698,34 +695,24 @@ static int acpi_power_add(struct acpi_device *device)
break;
default:
device->power.state = ACPI_STATE_UNKNOWN;
- break;
}
printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device),
acpi_device_bid(device), state ? "on" : "off");
- end:
+ device->flags.match_driver = true;
+ result = acpi_device_register(device, acpi_release_power_resource);
+
+ out:
if (result)
- kfree(resource);
+ acpi_release_power_resource(&device->dev);
- return result;
+ return;
}
-static int acpi_power_remove(struct acpi_device *device, int type)
-{
- struct acpi_power_resource *resource;
-
- if (!device)
- return -EINVAL;
-
- resource = acpi_driver_data(device);
- if (!resource)
- return -EINVAL;
-
- kfree(resource);
-
- return 0;
-}
+/* --------------------------------------------------------------------------
+ Driver Interface
+ -------------------------------------------------------------------------- */
#ifdef CONFIG_PM_SLEEP
static int acpi_power_resume(struct device *dev)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 02629a810c04..952b08af91de 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -464,7 +464,7 @@ int acpi_match_device_ids(struct acpi_device *device,
}
EXPORT_SYMBOL(acpi_match_device_ids);
-static void acpi_free_ids(struct acpi_device *device)
+void acpi_free_ids(struct acpi_device *device)
{
struct acpi_hardware_id *id, *tmp;
@@ -617,7 +617,8 @@ struct bus_type acpi_bus_type = {
.uevent = acpi_device_uevent,
};
-static int acpi_device_register(struct acpi_device *device)
+int acpi_device_register(struct acpi_device *device,
+ void (*release)(struct device *))
{
int result;
struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
@@ -686,7 +687,7 @@ static int acpi_device_register(struct acpi_device *device)
if (device->parent)
device->dev.parent = &device->parent->dev;
device->dev.bus = &acpi_bus_type;
- device->dev.release = &acpi_device_release;
+ device->dev.release = release;
result = device_register(&device->dev);
if (result) {
dev_err(&device->dev, "Error registering device\n");
@@ -1022,18 +1023,12 @@ static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
"error in _DSW or _PSW evaluation\n"));
}
-static void acpi_bus_add_power_resource(acpi_handle handle);
-
static void acpi_bus_get_power_flags(struct acpi_device *device)
{
acpi_status status = 0;
acpi_handle handle = NULL;
u32 i = 0;
- /* Power resources cannot be power manageable. */
- if (device->device_type == ACPI_BUS_TYPE_POWER)
- return;
-
/* Presence of _PS0|_PR0 indicates 'power manageable' */
status = acpi_get_handle(device->handle, "_PS0", &handle);
if (ACPI_FAILURE(status)) {
@@ -1068,8 +1063,10 @@ static void acpi_bus_get_power_flags(struct acpi_device *device)
int j;
device->power.flags.power_resources = 1;
- for (j = 0; j < ps->resources.count; j++)
- acpi_bus_add_power_resource(ps->resources.handles[j]);
+ for (j = 0; j < ps->resources.count; j++) {
+ acpi_handle rhandle = ps->resources.handles[j];
+ acpi_add_power_resource(rhandle);
+ }
}
/* Evaluate "_PSx" to see if we can do explicit sets */
@@ -1358,9 +1355,8 @@ static void acpi_device_set_id(struct acpi_device *device)
}
}
-static void acpi_init_device_object(struct acpi_device *device,
- acpi_handle handle,
- int type, unsigned long long sta)
+void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
+ int type, unsigned long long sta)
{
INIT_LIST_HEAD(&device->pnp.ids);
device->device_type = type;
@@ -1391,7 +1387,7 @@ static int acpi_add_single_object(struct acpi_device **child,
acpi_bus_get_wakeup_device_flags(device);
device->flags.match_driver = match_driver;
- result = acpi_device_register(device);
+ result = acpi_device_register(device, acpi_device_release);
if (result) {
acpi_device_release(&device->dev);
return result;
@@ -1407,19 +1403,6 @@ static int acpi_add_single_object(struct acpi_device **child,
return 0;
}
-#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
- ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
-
-static void acpi_bus_add_power_resource(acpi_handle handle)
-{
- struct acpi_device *device = NULL;
-
- acpi_bus_get_device(handle, &device);
- if (!device)
- acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER,
- ACPI_STA_DEFAULT, true);
-}
-
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
unsigned long long *sta)
{
@@ -1476,6 +1459,11 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
if (result)
return AE_OK;
+ if (type == ACPI_BUS_TYPE_POWER) {
+ acpi_add_power_resource(handle);
+ return AE_OK;
+ }
+
if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
!(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
struct acpi_device_wakeup wakeup;
@@ -1488,8 +1476,7 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
return AE_CTRL_DEPTH;
}
- acpi_add_single_object(&device, handle, type, sta,
- type == ACPI_BUS_TYPE_POWER);
+ acpi_add_single_object(&device, handle, type, sta, false);
if (!device)
return AE_CTRL_DEPTH;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 23:35:34 +0000