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THERMAL_HWMON is implemented inside the thermal_sys driver and has no effect on drivers implementing thermal zones, so they shouldn't see anything related to it in <linux/thermal.h>. Making the THERMAL_HWMON implementation fully internal has two advantages beyond the cleaner design: * This avoids rebuilding all thermal drivers if the THERMAL_HWMON implementation changes, or if CONFIG_THERMAL_HWMON gets enabled or disabled. * This avoids breaking the thermal kABI in these cases too, which should make distributions happy. The only drawback I can see is slightly higher memory fragmentation, as the number of kzalloc() calls will increase by one per thermal zone. But I doubt it will be a problem in practice, as I've never seen a system with more than two thermal zones. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Rene Herman <rene.herman@gmail.com> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
164 lines
4.9 KiB
C
164 lines
4.9 KiB
C
/*
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* thermal.h ($Revision: 0 $)
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*
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* Copyright (C) 2008 Intel Corp
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* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
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* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#ifndef __THERMAL_H__
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#define __THERMAL_H__
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#include <linux/idr.h>
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#include <linux/device.h>
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#include <linux/workqueue.h>
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struct thermal_zone_device;
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struct thermal_cooling_device;
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enum thermal_device_mode {
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THERMAL_DEVICE_DISABLED = 0,
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THERMAL_DEVICE_ENABLED,
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};
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enum thermal_trip_type {
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THERMAL_TRIP_ACTIVE = 0,
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THERMAL_TRIP_PASSIVE,
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THERMAL_TRIP_HOT,
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THERMAL_TRIP_CRITICAL,
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};
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struct thermal_zone_device_ops {
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int (*bind) (struct thermal_zone_device *,
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struct thermal_cooling_device *);
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int (*unbind) (struct thermal_zone_device *,
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struct thermal_cooling_device *);
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int (*get_temp) (struct thermal_zone_device *, unsigned long *);
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int (*get_mode) (struct thermal_zone_device *,
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enum thermal_device_mode *);
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int (*set_mode) (struct thermal_zone_device *,
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enum thermal_device_mode);
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int (*get_trip_type) (struct thermal_zone_device *, int,
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enum thermal_trip_type *);
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int (*get_trip_temp) (struct thermal_zone_device *, int,
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unsigned long *);
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int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
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int (*notify) (struct thermal_zone_device *, int,
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enum thermal_trip_type);
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};
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struct thermal_cooling_device_ops {
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int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
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int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
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int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
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};
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#define THERMAL_TRIPS_NONE -1
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#define THERMAL_MAX_TRIPS 12
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#define THERMAL_NAME_LENGTH 20
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struct thermal_cooling_device {
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int id;
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char type[THERMAL_NAME_LENGTH];
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struct device device;
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void *devdata;
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const struct thermal_cooling_device_ops *ops;
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struct list_head node;
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};
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#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
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((long)t-2732+5)/10 : ((long)t-2732-5)/10)
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#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
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struct thermal_zone_device {
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int id;
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char type[THERMAL_NAME_LENGTH];
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struct device device;
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void *devdata;
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int trips;
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int tc1;
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int tc2;
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int passive_delay;
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int polling_delay;
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int last_temperature;
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bool passive;
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unsigned int forced_passive;
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const struct thermal_zone_device_ops *ops;
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struct list_head cooling_devices;
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struct idr idr;
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struct mutex lock; /* protect cooling devices list */
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struct list_head node;
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struct delayed_work poll_queue;
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};
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/* Adding event notification support elements */
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#define THERMAL_GENL_FAMILY_NAME "thermal_event"
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#define THERMAL_GENL_VERSION 0x01
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#define THERMAL_GENL_MCAST_GROUP_NAME "thermal_mc_group"
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enum events {
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THERMAL_AUX0,
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THERMAL_AUX1,
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THERMAL_CRITICAL,
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THERMAL_DEV_FAULT,
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};
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struct thermal_genl_event {
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u32 orig;
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enum events event;
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};
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/* attributes of thermal_genl_family */
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enum {
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THERMAL_GENL_ATTR_UNSPEC,
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THERMAL_GENL_ATTR_EVENT,
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__THERMAL_GENL_ATTR_MAX,
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};
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#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
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/* commands supported by the thermal_genl_family */
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enum {
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THERMAL_GENL_CMD_UNSPEC,
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THERMAL_GENL_CMD_EVENT,
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__THERMAL_GENL_CMD_MAX,
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};
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#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
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struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
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const struct thermal_zone_device_ops *, int tc1, int tc2,
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int passive_freq, int polling_freq);
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void thermal_zone_device_unregister(struct thermal_zone_device *);
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int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
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struct thermal_cooling_device *);
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int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
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struct thermal_cooling_device *);
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void thermal_zone_device_update(struct thermal_zone_device *);
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struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
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const struct thermal_cooling_device_ops *);
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void thermal_cooling_device_unregister(struct thermal_cooling_device *);
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#ifdef CONFIG_NET
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extern int generate_netlink_event(u32 orig, enum events event);
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#else
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static inline int generate_netlink_event(u32 orig, enum events event)
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{
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return 0;
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}
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#endif
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#endif /* __THERMAL_H__ */
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