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path: root/drivers/acpi/power.c
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Diffstat (limited to 'drivers/acpi/power.c')
-rw-r--r--drivers/acpi/power.c157
1 files changed, 72 insertions, 85 deletions
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)
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-29 22:05:21 +0200