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-rw-r--r--drivers/acpi/bus.c14
-rw-r--r--drivers/acpi/fan.c40
-rw-r--r--drivers/acpi/scan.c110
-rw-r--r--drivers/acpi/thermal.c16
4 files changed, 174 insertions, 6 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index b77f03d51f0..dd3983cece9 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -205,12 +205,14 @@ int acpi_bus_set_power(acpi_handle handle, int state)
* Get device's current power state if it's unknown
* This means device power state isn't initialized or previous setting failed
*/
- if (device->power.state == ACPI_STATE_UNKNOWN)
- acpi_bus_get_power(device->handle, &device->power.state);
- if (state == device->power.state) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
- state));
- return_VALUE(0);
+ if (!device->flags.force_power_state) {
+ if (device->power.state == ACPI_STATE_UNKNOWN)
+ acpi_bus_get_power(device->handle, &device->power.state);
+ if (state == device->power.state) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
+ state));
+ return_VALUE(0);
+ }
}
if (!device->power.states[state].flags.valid) {
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device does not support D%d\n",
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index e8165c4f162..1cd25784b7a 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -48,6 +48,8 @@ MODULE_LICENSE("GPL");
static int acpi_fan_add(struct acpi_device *device);
static int acpi_fan_remove(struct acpi_device *device, int type);
+static int acpi_fan_suspend(struct acpi_device *device, int state);
+static int acpi_fan_resume(struct acpi_device *device, int state);
static struct acpi_driver acpi_fan_driver = {
.name = ACPI_FAN_DRIVER_NAME,
@@ -56,6 +58,8 @@ static struct acpi_driver acpi_fan_driver = {
.ops = {
.add = acpi_fan_add,
.remove = acpi_fan_remove,
+ .suspend = acpi_fan_suspend,
+ .resume = acpi_fan_resume,
},
};
@@ -206,6 +210,10 @@ static int acpi_fan_add(struct acpi_device *device)
goto end;
}
+ device->flags.force_power_state = 1;
+ acpi_bus_set_power(device->handle, state);
+ device->flags.force_power_state = 0;
+
result = acpi_fan_add_fs(device);
if (result)
goto end;
@@ -239,6 +247,38 @@ static int acpi_fan_remove(struct acpi_device *device, int type)
return_VALUE(0);
}
+static int acpi_fan_suspend(struct acpi_device *device, int state)
+{
+ if (!device)
+ return -EINVAL;
+
+ acpi_bus_set_power(device->handle, ACPI_STATE_D0);
+
+ return AE_OK;
+}
+
+static int acpi_fan_resume(struct acpi_device *device, int state)
+{
+ int result = 0;
+ int power_state = 0;
+
+ if (!device)
+ return -EINVAL;
+
+ result = acpi_bus_get_power(device->handle, &power_state);
+ if (result) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error reading fan power state\n"));
+ return result;
+ }
+
+ device->flags.force_power_state = 1;
+ acpi_bus_set_power(device->handle, power_state);
+ device->flags.force_power_state = 0;
+
+ return result;
+}
+
static int __init acpi_fan_init(void)
{
int result = 0;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index fe3693de7ba..f8316a05ede 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1341,6 +1341,100 @@ static int acpi_bus_scan_fixed(struct acpi_device *root)
return_VALUE(result);
}
+
+static inline struct acpi_device * to_acpi_dev(struct device * dev)
+{
+ return container_of(dev, struct acpi_device, dev);
+}
+
+
+static int root_suspend(struct acpi_device * acpi_dev, pm_message_t state)
+{
+ struct acpi_device * dev, * next;
+ int result;
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_entry_safe_reverse(dev, next, &acpi_device_list, g_list) {
+ if (dev->driver && dev->driver->ops.suspend) {
+ spin_unlock(&acpi_device_lock);
+ result = dev->driver->ops.suspend(dev, 0);
+ if (result) {
+ printk(KERN_ERR PREFIX "[%s - %s] Suspend failed: %d\n",
+ acpi_device_name(dev),
+ acpi_device_bid(dev), result);
+ }
+ spin_lock(&acpi_device_lock);
+ }
+ }
+ spin_unlock(&acpi_device_lock);
+ return 0;
+}
+
+
+static int acpi_device_suspend(struct device * dev, pm_message_t state)
+{
+ struct acpi_device * acpi_dev = to_acpi_dev(dev);
+
+ /*
+ * For now, we should only register 1 generic device -
+ * the ACPI root device - and from there, we walk the
+ * tree of ACPI devices to suspend each one using the
+ * ACPI driver methods.
+ */
+ if (acpi_dev->handle == ACPI_ROOT_OBJECT)
+ root_suspend(acpi_dev, state);
+ return 0;
+}
+
+
+
+static int root_resume(struct acpi_device * acpi_dev)
+{
+ struct acpi_device * dev, * next;
+ int result;
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_entry_safe(dev, next, &acpi_device_list, g_list) {
+ if (dev->driver && dev->driver->ops.resume) {
+ spin_unlock(&acpi_device_lock);
+ result = dev->driver->ops.resume(dev, 0);
+ if (result) {
+ printk(KERN_ERR PREFIX "[%s - %s] resume failed: %d\n",
+ acpi_device_name(dev),
+ acpi_device_bid(dev), result);
+ }
+ spin_lock(&acpi_device_lock);
+ }
+ }
+ spin_unlock(&acpi_device_lock);
+ return 0;
+}
+
+
+static int acpi_device_resume(struct device * dev)
+{
+ struct acpi_device * acpi_dev = to_acpi_dev(dev);
+
+ /*
+ * For now, we should only register 1 generic device -
+ * the ACPI root device - and from there, we walk the
+ * tree of ACPI devices to resume each one using the
+ * ACPI driver methods.
+ */
+ if (acpi_dev->handle == ACPI_ROOT_OBJECT)
+ root_resume(acpi_dev);
+ return 0;
+}
+
+
+struct bus_type acpi_bus_type = {
+ .name = "acpi",
+ .suspend = acpi_device_suspend,
+ .resume = acpi_device_resume,
+};
+
+
+
static int __init acpi_scan_init(void)
{
int result;
@@ -1353,6 +1447,12 @@ static int __init acpi_scan_init(void)
kset_register(&acpi_namespace_kset);
+ result = bus_register(&acpi_bus_type);
+ if (result) {
+ /* We don't want to quit even if we failed to add suspend/resume */
+ printk(KERN_ERR PREFIX "Could not register bus type\n");
+ }
+
/*
* Create the root device in the bus's device tree
*/
@@ -1362,6 +1462,16 @@ static int __init acpi_scan_init(void)
goto Done;
result = acpi_start_single_object(acpi_root);
+ if (result)
+ goto Done;
+
+ acpi_root->dev.bus = &acpi_bus_type;
+ snprintf(acpi_root->dev.bus_id, BUS_ID_SIZE, "%s", acpi_bus_type.name);
+ result = device_register(&acpi_root->dev);
+ if (result) {
+ /* We don't want to quit even if we failed to add suspend/resume */
+ printk(KERN_ERR PREFIX "Could not register device\n");
+ }
/*
* Enumerate devices in the ACPI namespace.
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index f003763de7b..e7fe3a14fda 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -82,6 +82,7 @@ MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
static int acpi_thermal_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device, int type);
+static int acpi_thermal_resume(struct acpi_device *device, int state);
static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
@@ -103,6 +104,7 @@ static struct acpi_driver acpi_thermal_driver = {
.ops = {
.add = acpi_thermal_add,
.remove = acpi_thermal_remove,
+ .resume = acpi_thermal_resume,
},
};
@@ -1417,6 +1419,20 @@ static int acpi_thermal_remove(struct acpi_device *device, int type)
return_VALUE(0);
}
+static int acpi_thermal_resume(struct acpi_device *device, int state)
+{
+ struct acpi_thermal *tz = NULL;
+
+ if (!device || !acpi_driver_data(device))
+ return_VALUE(-EINVAL);
+
+ tz = (struct acpi_thermal *)acpi_driver_data(device);
+
+ acpi_thermal_check(tz);
+
+ return AE_OK;
+}
+
static int __init acpi_thermal_init(void)
{
int result = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 00:33:47 +0000