static void acpi_thermal_notify(struct acpi_device *device, u32 event)
{
struct acpi_thermal *tz = acpi_driver_data(device);
if (!tz)
return;
switch (event) {
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
acpi_thermal_check(tz);
break;
case ACPI_THERMAL_NOTIFY_THRESHOLDS:
acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
acpi_thermal_check(tz);
acpi_bus_generate_proc_event(device, event, 0);
acpi_bus_generate_netlink_event(device->pnp.device_class,
dev_name(&device->dev), event, 0);
break;
case ACPI_THERMAL_NOTIFY_DEVICES:
acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
acpi_thermal_check(tz);
acpi_bus_generate_proc_event(device, event, 0);
acpi_bus_generate_netlink_event(device->pnp.device_class,
dev_name(&device->dev), event, 0);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
}
static int thermal_set_mode(struct thermal_zone_device *thermal,
enum thermal_device_mode mode)
{
struct acpi_thermal *tz = thermal->devdata;
int enable;
if (!tz)
return -EINVAL;
/*
* enable/disable thermal management from ACPI thermal driver
*/
if (mode == THERMAL_DEVICE_ENABLED)
enable = 1;
else if (mode == THERMAL_DEVICE_DISABLED)
enable = 0;
else
return -EINVAL;
if (enable != tz->tz_enabled) {
tz->tz_enabled = enable;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"%s ACPI thermal control\n",
tz->tz_enabled ? enabled : disabled));
acpi_thermal_check(tz);
}
return 0;
}
static int acpi_thermal_resume(struct acpi_device *device)
{
struct acpi_thermal *tz = NULL;
int i, j, power_state, result;
if (!device || !acpi_driver_data(device))
return -EINVAL;
tz = acpi_driver_data(device);
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
if (!(&tz->trips.active[i]))
break;
if (!tz->trips.active[i].flags.valid)
break;
tz->trips.active[i].flags.enabled = 1;
for (j = 0; j < tz->trips.active[i].devices.count; j++) {
result = acpi_bus_update_power(
tz->trips.active[i].devices.handles[j],
&power_state);
if (result || (power_state != ACPI_STATE_D0)) {
tz->trips.active[i].flags.enabled = 0;
break;
}
}
tz->state.active |= tz->trips.active[i].flags.enabled;
}
acpi_thermal_check(tz);
return AE_OK;
}
static int
acpi_thermal_write_polling (
struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
int result = 0;
struct acpi_thermal *tz = (struct acpi_thermal *) data;
char polling_string[12] = {'\0'};
int seconds = 0;
ACPI_FUNCTION_TRACE("acpi_thermal_write_polling");
if (!tz || (count > sizeof(polling_string) - 1))
return_VALUE(-EINVAL);
if (copy_from_user(polling_string, buffer, count))
return_VALUE(-EFAULT);
polling_string[count] = '\0';
seconds = simple_strtoul(polling_string, NULL, 0);
result = acpi_thermal_set_polling(tz, seconds);
if (result)
return_VALUE(result);
acpi_thermal_check(tz);
return_VALUE(count);
}
static int
acpi_thermal_add (
struct acpi_device *device)
{
int result = 0;
acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
ACPI_FUNCTION_TRACE("acpi_thermal_add");
if (!device)
return_VALUE(-EINVAL);
tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
if (!tz)
return_VALUE(-ENOMEM);
memset(tz, 0, sizeof(struct acpi_thermal));
tz->handle = device->handle;
sprintf(tz->name, "%s", device->pnp.bus_id);
sprintf(acpi_device_name(device), "%s", ACPI_THERMAL_DEVICE_NAME);
sprintf(acpi_device_class(device), "%s", ACPI_THERMAL_CLASS);
acpi_driver_data(device) = tz;
result = acpi_thermal_get_info(tz);
if (result)
goto end;
result = acpi_thermal_add_fs(device);
if (result)
return_VALUE(result);
init_timer(&tz->timer);
acpi_thermal_check(tz);
status = acpi_install_notify_handler(tz->handle,
ACPI_DEVICE_NOTIFY, acpi_thermal_notify, tz);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error installing notify handler\n"));
result = -ENODEV;
goto end;
}
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
acpi_device_name(device), acpi_device_bid(device),
KELVIN_TO_CELSIUS(tz->temperature));
end:
if (result) {
acpi_thermal_remove_fs(device);
kfree(tz);
}
return_VALUE(result);
}
static void
acpi_thermal_notify (
acpi_handle handle,
u32 event,
void *data)
{
struct acpi_thermal *tz = (struct acpi_thermal *) data;
struct acpi_device *device = NULL;
ACPI_FUNCTION_TRACE("acpi_thermal_notify");
if (!tz)
return_VOID;
if (acpi_bus_get_device(tz->handle, &device))
return_VOID;
switch (event) {
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
acpi_thermal_check(tz);
break;
case ACPI_THERMAL_NOTIFY_THRESHOLDS:
acpi_thermal_get_trip_points(tz);
acpi_thermal_check(tz);
acpi_bus_generate_event(device, event, 0);
break;
case ACPI_THERMAL_NOTIFY_DEVICES:
if (tz->flags.devices)
acpi_thermal_get_devices(tz);
acpi_bus_generate_event(device, event, 0);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return_VOID;
}
static void acpi_thermal_check_fn(struct work_struct *work)
{
struct acpi_thermal *tz = container_of(work, struct acpi_thermal,
thermal_check_work);
acpi_thermal_check(tz);
}
