diff options
| author | Anson Huang <b20788@freescale.com> | 2013-08-08 13:20:40 -0400 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2013-08-23 07:30:11 +0800 |
| commit | fb166957a9b89fdd234bbfca2f6b2a31cf5b03a0 (patch) | |
| tree | 907749ce728b1bc0d542fe60fe81b18433934272 /include | |
| parent | af4a88877844a3a7fc8fcf36b6f05191ea3edfbb (diff) | |
ENGR00274056-1 thermal: add device cooling for thermal driver
cpu cooling is not enough when temperature is
too hot, as some devices may contribute a lot of heat
to SOC, such as GPU, so we need to add device cooling
as well, when system is too hot, devices can also take
their actions to lower SOC temperature.
when temperature cross the passive trip, device cooling
driver will send out notification, those devices who
register this devfreq_cooling notification will take
actions to lower SOC temperature.
Signed-off-by: Anson Huang <b20788@freescale.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/device_cooling.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/device_cooling.h b/include/linux/device_cooling.h new file mode 100644 index 000000000000..ae40a451e4fa --- /dev/null +++ b/include/linux/device_cooling.h @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef __DEVICE_THERMAL_H__ +#define __DEVICE_THERMAL_H__ + +#include <linux/thermal.h> + +#ifdef CONFIG_DEVICE_THERMAL +int register_devfreq_cooling_notifier(struct notifier_block *nb); +int unregister_devfreq_cooling_notifier(struct notifier_block *nb); +struct thermal_cooling_device *devfreq_cooling_register(void); +void devfreq_cooling_unregister(struct thermal_cooling_device *cdev); +#else +static inline +int register_devfreq_cooling_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline +int unregister_devfreq_cooling_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline +struct thermal_cooling_device *devfreq_cooling_register(void) +{ + return NULL; +} + +static inline +void devfreq_cooling_unregister(struct thermal_cooling_device *cdev) +{ + return; +} +#endif +#endif /* __DEVICE_THERMAL_H__ */ |