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/*
* thermal . c - Generic Thermal Management Sysfs support .
*
* Copyright ( C ) 2008 Intel Corp
* Copyright ( C ) 2008 Zhang Rui < rui . zhang @ intel . com >
* Copyright ( C ) 2008 Sujith Thomas < sujith . thomas @ intel . com >
*
* ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; version 2 of the License .
*
* This program is distributed in the hope that it will be useful , but
* WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* General Public License for more details .
*
* You should have received a copy of the GNU General Public License along
* with this program ; if not , write to the Free Software Foundation , Inc . ,
* 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA .
*
* ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
*/
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# define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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# include <linux/module.h>
# include <linux/device.h>
# include <linux/err.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 11:04:11 +03:00
# include <linux/slab.h>
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# include <linux/kdev_t.h>
# include <linux/idr.h>
# include <linux/thermal.h>
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# include <linux/reboot.h>
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# include <net/netlink.h>
# include <net/genetlink.h>
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# include "thermal_core.h"
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MODULE_AUTHOR ( " Zhang Rui " ) ;
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MODULE_DESCRIPTION ( " Generic thermal management sysfs support " ) ;
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MODULE_LICENSE ( " GPL v2 " ) ;
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static DEFINE_IDR ( thermal_tz_idr ) ;
static DEFINE_IDR ( thermal_cdev_idr ) ;
static DEFINE_MUTEX ( thermal_idr_lock ) ;
static LIST_HEAD ( thermal_tz_list ) ;
static LIST_HEAD ( thermal_cdev_list ) ;
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static LIST_HEAD ( thermal_governor_list ) ;
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static DEFINE_MUTEX ( thermal_list_lock ) ;
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static DEFINE_MUTEX ( thermal_governor_lock ) ;
static struct thermal_governor * __find_governor ( const char * name )
{
struct thermal_governor * pos ;
list_for_each_entry ( pos , & thermal_governor_list , governor_list )
if ( ! strnicmp ( name , pos - > name , THERMAL_NAME_LENGTH ) )
return pos ;
return NULL ;
}
int thermal_register_governor ( struct thermal_governor * governor )
{
int err ;
const char * name ;
struct thermal_zone_device * pos ;
if ( ! governor )
return - EINVAL ;
mutex_lock ( & thermal_governor_lock ) ;
err = - EBUSY ;
if ( __find_governor ( governor - > name ) = = NULL ) {
err = 0 ;
list_add ( & governor - > governor_list , & thermal_governor_list ) ;
}
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( pos , & thermal_tz_list , node ) {
if ( pos - > governor )
continue ;
if ( pos - > tzp )
name = pos - > tzp - > governor_name ;
else
name = DEFAULT_THERMAL_GOVERNOR ;
if ( ! strnicmp ( name , governor - > name , THERMAL_NAME_LENGTH ) )
pos - > governor = governor ;
}
mutex_unlock ( & thermal_list_lock ) ;
mutex_unlock ( & thermal_governor_lock ) ;
return err ;
}
void thermal_unregister_governor ( struct thermal_governor * governor )
{
struct thermal_zone_device * pos ;
if ( ! governor )
return ;
mutex_lock ( & thermal_governor_lock ) ;
if ( __find_governor ( governor - > name ) = = NULL )
goto exit ;
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( pos , & thermal_tz_list , node ) {
if ( ! strnicmp ( pos - > governor - > name , governor - > name ,
THERMAL_NAME_LENGTH ) )
pos - > governor = NULL ;
}
mutex_unlock ( & thermal_list_lock ) ;
list_del ( & governor - > governor_list ) ;
exit :
mutex_unlock ( & thermal_governor_lock ) ;
return ;
}
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static int get_idr ( struct idr * idr , struct mutex * lock , int * id )
{
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int ret ;
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if ( lock )
mutex_lock ( lock ) ;
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ret = idr_alloc ( idr , NULL , 0 , 0 , GFP_KERNEL ) ;
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if ( lock )
mutex_unlock ( lock ) ;
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if ( unlikely ( ret < 0 ) )
return ret ;
* id = ret ;
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return 0 ;
}
static void release_idr ( struct idr * idr , struct mutex * lock , int id )
{
if ( lock )
mutex_lock ( lock ) ;
idr_remove ( idr , id ) ;
if ( lock )
mutex_unlock ( lock ) ;
}
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int get_tz_trend ( struct thermal_zone_device * tz , int trip )
{
enum thermal_trend trend ;
if ( ! tz - > ops - > get_trend | | tz - > ops - > get_trend ( tz , trip , & trend ) ) {
if ( tz - > temperature > tz - > last_temperature )
trend = THERMAL_TREND_RAISING ;
else if ( tz - > temperature < tz - > last_temperature )
trend = THERMAL_TREND_DROPPING ;
else
trend = THERMAL_TREND_STABLE ;
}
return trend ;
}
EXPORT_SYMBOL ( get_tz_trend ) ;
struct thermal_instance * get_thermal_instance ( struct thermal_zone_device * tz ,
struct thermal_cooling_device * cdev , int trip )
{
struct thermal_instance * pos = NULL ;
struct thermal_instance * target_instance = NULL ;
mutex_lock ( & tz - > lock ) ;
mutex_lock ( & cdev - > lock ) ;
list_for_each_entry ( pos , & tz - > thermal_instances , tz_node ) {
if ( pos - > tz = = tz & & pos - > trip = = trip & & pos - > cdev = = cdev ) {
target_instance = pos ;
break ;
}
}
mutex_unlock ( & cdev - > lock ) ;
mutex_unlock ( & tz - > lock ) ;
return target_instance ;
}
EXPORT_SYMBOL ( get_thermal_instance ) ;
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static void print_bind_err_msg ( struct thermal_zone_device * tz ,
struct thermal_cooling_device * cdev , int ret )
{
dev_err ( & tz - > device , " binding zone %s with cdev %s failed:%d \n " ,
tz - > type , cdev - > type , ret ) ;
}
static void __bind ( struct thermal_zone_device * tz , int mask ,
struct thermal_cooling_device * cdev )
{
int i , ret ;
for ( i = 0 ; i < tz - > trips ; i + + ) {
if ( mask & ( 1 < < i ) ) {
ret = thermal_zone_bind_cooling_device ( tz , i , cdev ,
THERMAL_NO_LIMIT , THERMAL_NO_LIMIT ) ;
if ( ret )
print_bind_err_msg ( tz , cdev , ret ) ;
}
}
}
static void __unbind ( struct thermal_zone_device * tz , int mask ,
struct thermal_cooling_device * cdev )
{
int i ;
for ( i = 0 ; i < tz - > trips ; i + + )
if ( mask & ( 1 < < i ) )
thermal_zone_unbind_cooling_device ( tz , i , cdev ) ;
}
static void bind_cdev ( struct thermal_cooling_device * cdev )
{
int i , ret ;
const struct thermal_zone_params * tzp ;
struct thermal_zone_device * pos = NULL ;
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( pos , & thermal_tz_list , node ) {
if ( ! pos - > tzp & & ! pos - > ops - > bind )
continue ;
if ( ! pos - > tzp & & pos - > ops - > bind ) {
ret = pos - > ops - > bind ( pos , cdev ) ;
if ( ret )
print_bind_err_msg ( pos , cdev , ret ) ;
}
tzp = pos - > tzp ;
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if ( ! tzp | | ! tzp - > tbp )
continue ;
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for ( i = 0 ; i < tzp - > num_tbps ; i + + ) {
if ( tzp - > tbp [ i ] . cdev | | ! tzp - > tbp [ i ] . match )
continue ;
if ( tzp - > tbp [ i ] . match ( pos , cdev ) )
continue ;
tzp - > tbp [ i ] . cdev = cdev ;
__bind ( pos , tzp - > tbp [ i ] . trip_mask , cdev ) ;
}
}
mutex_unlock ( & thermal_list_lock ) ;
}
static void bind_tz ( struct thermal_zone_device * tz )
{
int i , ret ;
struct thermal_cooling_device * pos = NULL ;
const struct thermal_zone_params * tzp = tz - > tzp ;
if ( ! tzp & & ! tz - > ops - > bind )
return ;
mutex_lock ( & thermal_list_lock ) ;
/* If there is no platform data, try to use ops->bind */
if ( ! tzp & & tz - > ops - > bind ) {
list_for_each_entry ( pos , & thermal_cdev_list , node ) {
ret = tz - > ops - > bind ( tz , pos ) ;
if ( ret )
print_bind_err_msg ( tz , pos , ret ) ;
}
goto exit ;
}
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if ( ! tzp | | ! tzp - > tbp )
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goto exit ;
list_for_each_entry ( pos , & thermal_cdev_list , node ) {
for ( i = 0 ; i < tzp - > num_tbps ; i + + ) {
if ( tzp - > tbp [ i ] . cdev | | ! tzp - > tbp [ i ] . match )
continue ;
if ( tzp - > tbp [ i ] . match ( tz , pos ) )
continue ;
tzp - > tbp [ i ] . cdev = pos ;
__bind ( tz , tzp - > tbp [ i ] . trip_mask , pos ) ;
}
}
exit :
mutex_unlock ( & thermal_list_lock ) ;
}
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static void thermal_zone_device_set_polling ( struct thermal_zone_device * tz ,
int delay )
{
if ( delay > 1000 )
mod_delayed_work ( system_freezable_wq , & tz - > poll_queue ,
round_jiffies ( msecs_to_jiffies ( delay ) ) ) ;
else if ( delay )
mod_delayed_work ( system_freezable_wq , & tz - > poll_queue ,
msecs_to_jiffies ( delay ) ) ;
else
cancel_delayed_work ( & tz - > poll_queue ) ;
}
static void monitor_thermal_zone ( struct thermal_zone_device * tz )
{
mutex_lock ( & tz - > lock ) ;
if ( tz - > passive )
thermal_zone_device_set_polling ( tz , tz - > passive_delay ) ;
else if ( tz - > polling_delay )
thermal_zone_device_set_polling ( tz , tz - > polling_delay ) ;
else
thermal_zone_device_set_polling ( tz , 0 ) ;
mutex_unlock ( & tz - > lock ) ;
}
static void handle_non_critical_trips ( struct thermal_zone_device * tz ,
int trip , enum thermal_trip_type trip_type )
{
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if ( tz - > governor )
tz - > governor - > throttle ( tz , trip ) ;
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}
static void handle_critical_trips ( struct thermal_zone_device * tz ,
int trip , enum thermal_trip_type trip_type )
{
long trip_temp ;
tz - > ops - > get_trip_temp ( tz , trip , & trip_temp ) ;
/* If we have not crossed the trip_temp, we do not care. */
if ( tz - > temperature < trip_temp )
return ;
if ( tz - > ops - > notify )
tz - > ops - > notify ( tz , trip , trip_type ) ;
if ( trip_type = = THERMAL_TRIP_CRITICAL ) {
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dev_emerg ( & tz - > device ,
" critical temperature reached(%d C),shutting down \n " ,
tz - > temperature / 1000 ) ;
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orderly_poweroff ( true ) ;
}
}
static void handle_thermal_trip ( struct thermal_zone_device * tz , int trip )
{
enum thermal_trip_type type ;
tz - > ops - > get_trip_type ( tz , trip , & type ) ;
if ( type = = THERMAL_TRIP_CRITICAL | | type = = THERMAL_TRIP_HOT )
handle_critical_trips ( tz , trip , type ) ;
else
handle_non_critical_trips ( tz , trip , type ) ;
/*
* Alright , we handled this trip successfully .
* So , start monitoring again .
*/
monitor_thermal_zone ( tz ) ;
}
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/**
* thermal_zone_get_temp ( ) - returns its the temperature of thermal zone
* @ tz : a valid pointer to a struct thermal_zone_device
* @ temp : a valid pointer to where to store the resulting temperature .
*
* When a valid thermal zone reference is passed , it will fetch its
* temperature and fill @ temp .
*
* Return : On success returns 0 , an error code otherwise
*/
int thermal_zone_get_temp ( struct thermal_zone_device * tz , unsigned long * temp )
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{
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int ret = - EINVAL ;
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# ifdef CONFIG_THERMAL_EMULATION
int count ;
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unsigned long crit_temp = - 1UL ;
enum thermal_trip_type type ;
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# endif
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if ( IS_ERR_OR_NULL ( tz ) )
goto exit ;
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mutex_lock ( & tz - > lock ) ;
ret = tz - > ops - > get_temp ( tz , temp ) ;
# ifdef CONFIG_THERMAL_EMULATION
if ( ! tz - > emul_temperature )
goto skip_emul ;
for ( count = 0 ; count < tz - > trips ; count + + ) {
ret = tz - > ops - > get_trip_type ( tz , count , & type ) ;
if ( ! ret & & type = = THERMAL_TRIP_CRITICAL ) {
ret = tz - > ops - > get_trip_temp ( tz , count , & crit_temp ) ;
break ;
}
}
if ( ret )
goto skip_emul ;
if ( * temp < crit_temp )
* temp = tz - > emul_temperature ;
skip_emul :
# endif
mutex_unlock ( & tz - > lock ) ;
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exit :
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return ret ;
}
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EXPORT_SYMBOL_GPL ( thermal_zone_get_temp ) ;
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static void update_temperature ( struct thermal_zone_device * tz )
{
long temp ;
int ret ;
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ret = thermal_zone_get_temp ( tz , & temp ) ;
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if ( ret ) {
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dev_warn ( & tz - > device , " failed to read out thermal zone %d \n " ,
tz - > id ) ;
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return ;
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}
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mutex_lock ( & tz - > lock ) ;
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tz - > last_temperature = tz - > temperature ;
tz - > temperature = temp ;
mutex_unlock ( & tz - > lock ) ;
}
void thermal_zone_device_update ( struct thermal_zone_device * tz )
{
int count ;
update_temperature ( tz ) ;
for ( count = 0 ; count < tz - > trips ; count + + )
handle_thermal_trip ( tz , count ) ;
}
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EXPORT_SYMBOL_GPL ( thermal_zone_device_update ) ;
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static void thermal_zone_device_check ( struct work_struct * work )
{
struct thermal_zone_device * tz = container_of ( work , struct
thermal_zone_device ,
poll_queue . work ) ;
thermal_zone_device_update ( tz ) ;
}
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/* sys I/F for thermal zone */
# define to_thermal_zone(_dev) \
container_of ( _dev , struct thermal_zone_device , device )
static ssize_t
type_show ( struct device * dev , struct device_attribute * attr , char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
return sprintf ( buf , " %s \n " , tz - > type ) ;
}
static ssize_t
temp_show ( struct device * dev , struct device_attribute * attr , char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
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long temperature ;
int ret ;
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ret = thermal_zone_get_temp ( tz , & temperature ) ;
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if ( ret )
return ret ;
return sprintf ( buf , " %ld \n " , temperature ) ;
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}
static ssize_t
mode_show ( struct device * dev , struct device_attribute * attr , char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
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enum thermal_device_mode mode ;
int result ;
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if ( ! tz - > ops - > get_mode )
return - EPERM ;
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result = tz - > ops - > get_mode ( tz , & mode ) ;
if ( result )
return result ;
return sprintf ( buf , " %s \n " , mode = = THERMAL_DEVICE_ENABLED ? " enabled "
: " disabled " ) ;
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}
static ssize_t
mode_store ( struct device * dev , struct device_attribute * attr ,
const char * buf , size_t count )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
int result ;
if ( ! tz - > ops - > set_mode )
return - EPERM ;
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if ( ! strncmp ( buf , " enabled " , sizeof ( " enabled " ) - 1 ) )
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result = tz - > ops - > set_mode ( tz , THERMAL_DEVICE_ENABLED ) ;
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else if ( ! strncmp ( buf , " disabled " , sizeof ( " disabled " ) - 1 ) )
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result = tz - > ops - > set_mode ( tz , THERMAL_DEVICE_DISABLED ) ;
else
result = - EINVAL ;
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if ( result )
return result ;
return count ;
}
static ssize_t
trip_point_type_show ( struct device * dev , struct device_attribute * attr ,
char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
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enum thermal_trip_type type ;
int trip , result ;
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if ( ! tz - > ops - > get_trip_type )
return - EPERM ;
if ( ! sscanf ( attr - > attr . name , " trip_point_%d_type " , & trip ) )
return - EINVAL ;
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result = tz - > ops - > get_trip_type ( tz , trip , & type ) ;
if ( result )
return result ;
switch ( type ) {
case THERMAL_TRIP_CRITICAL :
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return sprintf ( buf , " critical \n " ) ;
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case THERMAL_TRIP_HOT :
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return sprintf ( buf , " hot \n " ) ;
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case THERMAL_TRIP_PASSIVE :
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return sprintf ( buf , " passive \n " ) ;
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case THERMAL_TRIP_ACTIVE :
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return sprintf ( buf , " active \n " ) ;
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default :
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return sprintf ( buf , " unknown \n " ) ;
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}
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}
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static ssize_t
trip_point_temp_store ( struct device * dev , struct device_attribute * attr ,
const char * buf , size_t count )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
int trip , ret ;
unsigned long temperature ;
if ( ! tz - > ops - > set_trip_temp )
return - EPERM ;
if ( ! sscanf ( attr - > attr . name , " trip_point_%d_temp " , & trip ) )
return - EINVAL ;
if ( kstrtoul ( buf , 10 , & temperature ) )
return - EINVAL ;
ret = tz - > ops - > set_trip_temp ( tz , trip , temperature ) ;
return ret ? ret : count ;
}
2008-01-17 10:51:08 +03:00
static ssize_t
trip_point_temp_show ( struct device * dev , struct device_attribute * attr ,
char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
2008-11-27 20:48:13 +03:00
int trip , ret ;
long temperature ;
2008-01-17 10:51:08 +03:00
if ( ! tz - > ops - > get_trip_temp )
return - EPERM ;
if ( ! sscanf ( attr - > attr . name , " trip_point_%d_temp " , & trip ) )
return - EINVAL ;
2008-11-27 20:48:13 +03:00
ret = tz - > ops - > get_trip_temp ( tz , trip , & temperature ) ;
if ( ret )
return ret ;
return sprintf ( buf , " %ld \n " , temperature ) ;
2008-01-17 10:51:08 +03:00
}
2012-07-25 06:10:59 +04:00
static ssize_t
trip_point_hyst_store ( struct device * dev , struct device_attribute * attr ,
const char * buf , size_t count )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
int trip , ret ;
unsigned long temperature ;
if ( ! tz - > ops - > set_trip_hyst )
return - EPERM ;
if ( ! sscanf ( attr - > attr . name , " trip_point_%d_hyst " , & trip ) )
return - EINVAL ;
if ( kstrtoul ( buf , 10 , & temperature ) )
return - EINVAL ;
/*
* We are not doing any check on the ' temperature ' value
* here . The driver implementing ' set_trip_hyst ' has to
* take care of this .
*/
ret = tz - > ops - > set_trip_hyst ( tz , trip , temperature ) ;
return ret ? ret : count ;
}
static ssize_t
trip_point_hyst_show ( struct device * dev , struct device_attribute * attr ,
char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
int trip , ret ;
unsigned long temperature ;
if ( ! tz - > ops - > get_trip_hyst )
return - EPERM ;
if ( ! sscanf ( attr - > attr . name , " trip_point_%d_hyst " , & trip ) )
return - EINVAL ;
ret = tz - > ops - > get_trip_hyst ( tz , trip , & temperature ) ;
return ret ? ret : sprintf ( buf , " %ld \n " , temperature ) ;
}
2008-12-03 21:00:38 +03:00
static ssize_t
passive_store ( struct device * dev , struct device_attribute * attr ,
const char * buf , size_t count )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
struct thermal_cooling_device * cdev = NULL ;
int state ;
if ( ! sscanf ( buf , " %d \n " , & state ) )
return - EINVAL ;
2009-10-26 10:39:02 +03:00
/* sanity check: values below 1000 millicelcius don't make sense
* and can cause the system to go into a thermal heart attack
*/
if ( state & & state < 1000 )
return - EINVAL ;
2008-12-03 21:00:38 +03:00
if ( state & & ! tz - > forced_passive ) {
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( cdev , & thermal_cdev_list , node ) {
if ( ! strncmp ( " Processor " , cdev - > type ,
sizeof ( " Processor " ) ) )
thermal_zone_bind_cooling_device ( tz ,
2012-06-26 12:35:57 +04:00
THERMAL_TRIPS_NONE , cdev ,
THERMAL_NO_LIMIT ,
THERMAL_NO_LIMIT ) ;
2008-12-03 21:00:38 +03:00
}
mutex_unlock ( & thermal_list_lock ) ;
2009-10-26 10:39:03 +03:00
if ( ! tz - > passive_delay )
tz - > passive_delay = 1000 ;
2008-12-03 21:00:38 +03:00
} else if ( ! state & & tz - > forced_passive ) {
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( cdev , & thermal_cdev_list , node ) {
if ( ! strncmp ( " Processor " , cdev - > type ,
sizeof ( " Processor " ) ) )
thermal_zone_unbind_cooling_device ( tz ,
THERMAL_TRIPS_NONE ,
cdev ) ;
}
mutex_unlock ( & thermal_list_lock ) ;
2009-10-26 10:39:03 +03:00
tz - > passive_delay = 0 ;
2008-12-03 21:00:38 +03:00
}
tz - > forced_passive = state ;
thermal_zone_device_update ( tz ) ;
return count ;
}
static ssize_t
passive_show ( struct device * dev , struct device_attribute * attr ,
char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
return sprintf ( buf , " %d \n " , tz - > forced_passive ) ;
}
2012-09-18 09:34:58 +04:00
static ssize_t
policy_store ( struct device * dev , struct device_attribute * attr ,
const char * buf , size_t count )
{
int ret = - EINVAL ;
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
struct thermal_governor * gov ;
mutex_lock ( & thermal_governor_lock ) ;
gov = __find_governor ( buf ) ;
if ( ! gov )
goto exit ;
tz - > governor = gov ;
ret = count ;
exit :
mutex_unlock ( & thermal_governor_lock ) ;
return ret ;
}
static ssize_t
policy_show ( struct device * dev , struct device_attribute * devattr , char * buf )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
return sprintf ( buf , " %s \n " , tz - > governor - > name ) ;
}
2013-02-04 04:30:15 +04:00
# ifdef CONFIG_THERMAL_EMULATION
static ssize_t
emul_temp_store ( struct device * dev , struct device_attribute * attr ,
const char * buf , size_t count )
{
struct thermal_zone_device * tz = to_thermal_zone ( dev ) ;
int ret = 0 ;
unsigned long temperature ;
if ( kstrtoul ( buf , 10 , & temperature ) )
return - EINVAL ;
if ( ! tz - > ops - > set_emul_temp ) {
mutex_lock ( & tz - > lock ) ;
tz - > emul_temperature = temperature ;
mutex_unlock ( & tz - > lock ) ;
} else {
ret = tz - > ops - > set_emul_temp ( tz , temperature ) ;
}
return ret ? ret : count ;
}
static DEVICE_ATTR ( emul_temp , S_IWUSR , NULL , emul_temp_store ) ;
# endif /*CONFIG_THERMAL_EMULATION*/
2008-01-17 10:51:08 +03:00
static DEVICE_ATTR ( type , 0444 , type_show , NULL ) ;
static DEVICE_ATTR ( temp , 0444 , temp_show , NULL ) ;
static DEVICE_ATTR ( mode , 0644 , mode_show , mode_store ) ;
2012-03-21 23:55:01 +04:00
static DEVICE_ATTR ( passive , S_IRUGO | S_IWUSR , passive_show , passive_store ) ;
2012-09-18 09:34:58 +04:00
static DEVICE_ATTR ( policy , S_IRUGO | S_IWUSR , policy_show , policy_store ) ;
2008-01-17 10:51:08 +03:00
/* sys I/F for cooling device */
# define to_cooling_device(_dev) \
container_of ( _dev , struct thermal_cooling_device , device )
static ssize_t
thermal_cooling_device_type_show ( struct device * dev ,
struct device_attribute * attr , char * buf )
{
struct thermal_cooling_device * cdev = to_cooling_device ( dev ) ;
return sprintf ( buf , " %s \n " , cdev - > type ) ;
}
static ssize_t
thermal_cooling_device_max_state_show ( struct device * dev ,
struct device_attribute * attr , char * buf )
{
struct thermal_cooling_device * cdev = to_cooling_device ( dev ) ;
2008-11-27 20:48:13 +03:00
unsigned long state ;
int ret ;
2008-01-17 10:51:08 +03:00
2008-11-27 20:48:13 +03:00
ret = cdev - > ops - > get_max_state ( cdev , & state ) ;
if ( ret )
return ret ;
return sprintf ( buf , " %ld \n " , state ) ;
2008-01-17 10:51:08 +03:00
}
static ssize_t
thermal_cooling_device_cur_state_show ( struct device * dev ,
struct device_attribute * attr , char * buf )
{
struct thermal_cooling_device * cdev = to_cooling_device ( dev ) ;
2008-11-27 20:48:13 +03:00
unsigned long state ;
int ret ;
2008-01-17 10:51:08 +03:00
2008-11-27 20:48:13 +03:00
ret = cdev - > ops - > get_cur_state ( cdev , & state ) ;
if ( ret )
return ret ;
return sprintf ( buf , " %ld \n " , state ) ;
2008-01-17 10:51:08 +03:00
}
static ssize_t
thermal_cooling_device_cur_state_store ( struct device * dev ,
struct device_attribute * attr ,
const char * buf , size_t count )
{
struct thermal_cooling_device * cdev = to_cooling_device ( dev ) ;
2008-11-27 20:48:13 +03:00
unsigned long state ;
2008-01-17 10:51:08 +03:00
int result ;
2008-11-27 20:48:13 +03:00
if ( ! sscanf ( buf , " %ld \n " , & state ) )
2008-01-17 10:51:08 +03:00
return - EINVAL ;
2009-12-16 00:46:50 +03:00
if ( ( long ) state < 0 )
2008-01-17 10:51:08 +03:00
return - EINVAL ;
result = cdev - > ops - > set_cur_state ( cdev , state ) ;
if ( result )
return result ;
return count ;
}
static struct device_attribute dev_attr_cdev_type =
2008-02-08 00:55:08 +03:00
__ATTR ( type , 0444 , thermal_cooling_device_type_show , NULL ) ;
2008-01-17 10:51:08 +03:00
static DEVICE_ATTR ( max_state , 0444 ,
thermal_cooling_device_max_state_show , NULL ) ;
static DEVICE_ATTR ( cur_state , 0644 ,
thermal_cooling_device_cur_state_show ,
thermal_cooling_device_cur_state_store ) ;
static ssize_t
thermal_cooling_device_trip_point_show ( struct device * dev ,
2008-02-08 00:55:08 +03:00
struct device_attribute * attr , char * buf )
2008-01-17 10:51:08 +03:00
{
2012-06-27 06:08:19 +04:00
struct thermal_instance * instance ;
2008-01-17 10:51:08 +03:00
instance =
2012-06-27 06:08:19 +04:00
container_of ( attr , struct thermal_instance , attr ) ;
2008-01-17 10:51:08 +03:00
if ( instance - > trip = = THERMAL_TRIPS_NONE )
return sprintf ( buf , " -1 \n " ) ;
else
return sprintf ( buf , " %d \n " , instance - > trip ) ;
}
/* Device management */
2008-06-24 21:38:56 +04:00
# if defined(CONFIG_THERMAL_HWMON)
2008-04-21 12:07:52 +04:00
/* hwmon sys I/F */
# include <linux/hwmon.h>
2011-07-29 00:48:42 +04:00
/* thermal zone devices with the same type share one hwmon device */
struct thermal_hwmon_device {
char type [ THERMAL_NAME_LENGTH ] ;
struct device * device ;
int count ;
struct list_head tz_list ;
struct list_head node ;
} ;
struct thermal_hwmon_attr {
struct device_attribute attr ;
char name [ 16 ] ;
} ;
/* one temperature input for each thermal zone */
struct thermal_hwmon_temp {
struct list_head hwmon_node ;
struct thermal_zone_device * tz ;
struct thermal_hwmon_attr temp_input ; /* hwmon sys attr */
struct thermal_hwmon_attr temp_crit ; /* hwmon sys attr */
} ;
2008-04-21 12:07:52 +04:00
static LIST_HEAD ( thermal_hwmon_list ) ;
static ssize_t
name_show ( struct device * dev , struct device_attribute * attr , char * buf )
{
2009-05-01 01:43:31 +04:00
struct thermal_hwmon_device * hwmon = dev_get_drvdata ( dev ) ;
2008-04-21 12:07:52 +04:00
return sprintf ( buf , " %s \n " , hwmon - > type ) ;
}
static DEVICE_ATTR ( name , 0444 , name_show , NULL ) ;
static ssize_t
temp_input_show ( struct device * dev , struct device_attribute * attr , char * buf )
{
2008-11-27 20:48:13 +03:00
long temperature ;
int ret ;
2008-04-21 12:07:52 +04:00
struct thermal_hwmon_attr * hwmon_attr
= container_of ( attr , struct thermal_hwmon_attr , attr ) ;
2011-07-29 00:48:42 +04:00
struct thermal_hwmon_temp * temp
= container_of ( hwmon_attr , struct thermal_hwmon_temp ,
2008-04-21 12:07:52 +04:00
temp_input ) ;
2011-07-29 00:48:42 +04:00
struct thermal_zone_device * tz = temp - > tz ;
2008-04-21 12:07:52 +04:00
2013-02-04 04:30:15 +04:00
ret = thermal_zone_get_temp ( tz , & temperature ) ;
2008-11-27 20:48:13 +03:00
if ( ret )
return ret ;
return sprintf ( buf , " %ld \n " , temperature ) ;
2008-04-21 12:07:52 +04:00
}
static ssize_t
temp_crit_show ( struct device * dev , struct device_attribute * attr ,
char * buf )
{
struct thermal_hwmon_attr * hwmon_attr
= container_of ( attr , struct thermal_hwmon_attr , attr ) ;
2011-07-29 00:48:42 +04:00
struct thermal_hwmon_temp * temp
= container_of ( hwmon_attr , struct thermal_hwmon_temp ,
2008-04-21 12:07:52 +04:00
temp_crit ) ;
2011-07-29 00:48:42 +04:00
struct thermal_zone_device * tz = temp - > tz ;
2008-11-27 20:48:13 +03:00
long temperature ;
int ret ;
ret = tz - > ops - > get_trip_temp ( tz , 0 , & temperature ) ;
if ( ret )
return ret ;
2008-04-21 12:07:52 +04:00
2008-11-27 20:48:13 +03:00
return sprintf ( buf , " %ld \n " , temperature ) ;
2008-04-21 12:07:52 +04:00
}
2011-07-29 00:48:41 +04:00
static struct thermal_hwmon_device *
thermal_hwmon_lookup_by_type ( const struct thermal_zone_device * tz )
2008-04-21 12:07:52 +04:00
{
struct thermal_hwmon_device * hwmon ;
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( hwmon , & thermal_hwmon_list , node )
if ( ! strcmp ( hwmon - > type , tz - > type ) ) {
mutex_unlock ( & thermal_list_lock ) ;
2011-07-29 00:48:41 +04:00
return hwmon ;
2008-04-21 12:07:52 +04:00
}
mutex_unlock ( & thermal_list_lock ) ;
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return NULL ;
}
2011-07-29 00:48:42 +04:00
/* Find the temperature input matching a given thermal zone */
static struct thermal_hwmon_temp *
thermal_hwmon_lookup_temp ( const struct thermal_hwmon_device * hwmon ,
const struct thermal_zone_device * tz )
{
struct thermal_hwmon_temp * temp ;
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( temp , & hwmon - > tz_list , hwmon_node )
if ( temp - > tz = = tz ) {
mutex_unlock ( & thermal_list_lock ) ;
return temp ;
}
mutex_unlock ( & thermal_list_lock ) ;
return NULL ;
}
2011-07-29 00:48:41 +04:00
static int
thermal_add_hwmon_sysfs ( struct thermal_zone_device * tz )
{
struct thermal_hwmon_device * hwmon ;
2011-07-29 00:48:42 +04:00
struct thermal_hwmon_temp * temp ;
2011-07-29 00:48:41 +04:00
int new_hwmon_device = 1 ;
int result ;
hwmon = thermal_hwmon_lookup_by_type ( tz ) ;
if ( hwmon ) {
new_hwmon_device = 0 ;
goto register_sys_interface ;
}
2008-04-21 12:07:52 +04:00
hwmon = kzalloc ( sizeof ( struct thermal_hwmon_device ) , GFP_KERNEL ) ;
if ( ! hwmon )
return - ENOMEM ;
INIT_LIST_HEAD ( & hwmon - > tz_list ) ;
strlcpy ( hwmon - > type , tz - > type , THERMAL_NAME_LENGTH ) ;
hwmon - > device = hwmon_device_register ( NULL ) ;
if ( IS_ERR ( hwmon - > device ) ) {
result = PTR_ERR ( hwmon - > device ) ;
goto free_mem ;
}
2009-05-01 01:43:31 +04:00
dev_set_drvdata ( hwmon - > device , hwmon ) ;
2008-04-21 12:07:52 +04:00
result = device_create_file ( hwmon - > device , & dev_attr_name ) ;
if ( result )
2011-03-03 02:00:13 +03:00
goto free_mem ;
2008-04-21 12:07:52 +04:00
register_sys_interface :
2011-07-29 00:48:42 +04:00
temp = kzalloc ( sizeof ( struct thermal_hwmon_temp ) , GFP_KERNEL ) ;
if ( ! temp ) {
result = - ENOMEM ;
goto unregister_name ;
}
temp - > tz = tz ;
2008-04-21 12:07:52 +04:00
hwmon - > count + + ;
2012-07-21 04:53:48 +04:00
snprintf ( temp - > temp_input . name , sizeof ( temp - > temp_input . name ) ,
2008-04-21 12:07:52 +04:00
" temp%d_input " , hwmon - > count ) ;
2011-07-29 00:48:42 +04:00
temp - > temp_input . attr . attr . name = temp - > temp_input . name ;
temp - > temp_input . attr . attr . mode = 0444 ;
temp - > temp_input . attr . show = temp_input_show ;
sysfs_attr_init ( & temp - > temp_input . attr . attr ) ;
result = device_create_file ( hwmon - > device , & temp - > temp_input . attr ) ;
2008-04-21 12:07:52 +04:00
if ( result )
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goto free_temp_mem ;
2008-04-21 12:07:52 +04:00
if ( tz - > ops - > get_crit_temp ) {
unsigned long temperature ;
if ( ! tz - > ops - > get_crit_temp ( tz , & temperature ) ) {
2012-07-21 04:53:48 +04:00
snprintf ( temp - > temp_crit . name ,
sizeof ( temp - > temp_crit . name ) ,
2008-04-21 12:07:52 +04:00
" temp%d_crit " , hwmon - > count ) ;
2011-07-29 00:48:42 +04:00
temp - > temp_crit . attr . attr . name = temp - > temp_crit . name ;
temp - > temp_crit . attr . attr . mode = 0444 ;
temp - > temp_crit . attr . show = temp_crit_show ;
sysfs_attr_init ( & temp - > temp_crit . attr . attr ) ;
2008-04-21 12:07:52 +04:00
result = device_create_file ( hwmon - > device ,
2011-07-29 00:48:42 +04:00
& temp - > temp_crit . attr ) ;
2008-04-21 12:07:52 +04:00
if ( result )
2011-03-03 02:00:13 +03:00
goto unregister_input ;
2008-04-21 12:07:52 +04:00
}
}
mutex_lock ( & thermal_list_lock ) ;
if ( new_hwmon_device )
list_add_tail ( & hwmon - > node , & thermal_hwmon_list ) ;
2011-07-29 00:48:42 +04:00
list_add_tail ( & temp - > hwmon_node , & hwmon - > tz_list ) ;
2008-04-21 12:07:52 +04:00
mutex_unlock ( & thermal_list_lock ) ;
return 0 ;
2011-03-03 02:00:13 +03:00
unregister_input :
2011-07-29 00:48:42 +04:00
device_remove_file ( hwmon - > device , & temp - > temp_input . attr ) ;
free_temp_mem :
kfree ( temp ) ;
2011-03-03 02:00:13 +03:00
unregister_name :
2008-04-21 12:07:52 +04:00
if ( new_hwmon_device ) {
device_remove_file ( hwmon - > device , & dev_attr_name ) ;
hwmon_device_unregister ( hwmon - > device ) ;
}
free_mem :
if ( new_hwmon_device )
kfree ( hwmon ) ;
return result ;
}
static void
thermal_remove_hwmon_sysfs ( struct thermal_zone_device * tz )
{
2011-07-29 00:48:42 +04:00
struct thermal_hwmon_device * hwmon ;
struct thermal_hwmon_temp * temp ;
hwmon = thermal_hwmon_lookup_by_type ( tz ) ;
if ( unlikely ( ! hwmon ) ) {
/* Should never happen... */
dev_dbg ( & tz - > device , " hwmon device lookup failed! \n " ) ;
return ;
}
temp = thermal_hwmon_lookup_temp ( hwmon , tz ) ;
if ( unlikely ( ! temp ) ) {
/* Should never happen... */
dev_dbg ( & tz - > device , " temperature input lookup failed! \n " ) ;
return ;
}
2008-04-21 12:07:52 +04:00
2011-07-29 00:48:42 +04:00
device_remove_file ( hwmon - > device , & temp - > temp_input . attr ) ;
2011-03-03 02:00:13 +03:00
if ( tz - > ops - > get_crit_temp )
2011-07-29 00:48:42 +04:00
device_remove_file ( hwmon - > device , & temp - > temp_crit . attr ) ;
2008-04-21 12:07:52 +04:00
mutex_lock ( & thermal_list_lock ) ;
2011-07-29 00:48:42 +04:00
list_del ( & temp - > hwmon_node ) ;
kfree ( temp ) ;
2008-04-21 12:07:52 +04:00
if ( ! list_empty ( & hwmon - > tz_list ) ) {
mutex_unlock ( & thermal_list_lock ) ;
return ;
}
list_del ( & hwmon - > node ) ;
mutex_unlock ( & thermal_list_lock ) ;
device_remove_file ( hwmon - > device , & dev_attr_name ) ;
hwmon_device_unregister ( hwmon - > device ) ;
kfree ( hwmon ) ;
}
# else
static int
thermal_add_hwmon_sysfs ( struct thermal_zone_device * tz )
{
return 0 ;
}
static void
thermal_remove_hwmon_sysfs ( struct thermal_zone_device * tz )
{
}
# endif
2008-01-17 10:51:08 +03:00
/**
2013-04-24 01:48:16 +04:00
* thermal_zone_bind_cooling_device ( ) - bind a cooling device to a thermal zone
* @ tz : pointer to struct thermal_zone_device
2008-01-17 10:51:08 +03:00
* @ trip : indicates which trip point the cooling devices is
* associated with in this thermal zone .
2013-04-24 01:48:16 +04:00
* @ cdev : pointer to struct thermal_cooling_device
* @ upper : the Maximum cooling state for this trip point .
* THERMAL_NO_LIMIT means no upper limit ,
* and the cooling device can be in max_state .
* @ lower : the Minimum cooling state can be used for this trip point .
* THERMAL_NO_LIMIT means no lower limit ,
* and the cooling device can be in cooling state 0.
2008-02-08 00:55:08 +03:00
*
2013-04-24 01:48:16 +04:00
* This interface function bind a thermal cooling device to the certain trip
* point of a thermal zone device .
2008-02-08 00:55:08 +03:00
* This function is usually called in the thermal zone device . bind callback .
2013-04-24 01:48:16 +04:00
*
* Return : 0 on success , the proper error value otherwise .
2008-01-17 10:51:08 +03:00
*/
int thermal_zone_bind_cooling_device ( struct thermal_zone_device * tz ,
int trip ,
2012-06-26 12:35:57 +04:00
struct thermal_cooling_device * cdev ,
unsigned long upper , unsigned long lower )
2008-01-17 10:51:08 +03:00
{
2012-06-27 06:08:19 +04:00
struct thermal_instance * dev ;
struct thermal_instance * pos ;
2008-02-15 08:58:50 +03:00
struct thermal_zone_device * pos1 ;
struct thermal_cooling_device * pos2 ;
2012-06-26 12:27:22 +04:00
unsigned long max_state ;
2008-01-17 10:51:08 +03:00
int result ;
2008-02-08 00:55:08 +03:00
if ( trip > = tz - > trips | | ( trip < 0 & & trip ! = THERMAL_TRIPS_NONE ) )
2008-01-17 10:51:08 +03:00
return - EINVAL ;
2008-02-15 08:58:50 +03:00
list_for_each_entry ( pos1 , & thermal_tz_list , node ) {
if ( pos1 = = tz )
break ;
}
list_for_each_entry ( pos2 , & thermal_cdev_list , node ) {
if ( pos2 = = cdev )
break ;
}
if ( tz ! = pos1 | | cdev ! = pos2 )
2008-01-17 10:51:08 +03:00
return - EINVAL ;
2012-06-26 12:35:57 +04:00
cdev - > ops - > get_max_state ( cdev , & max_state ) ;
/* lower default 0, upper default max_state */
lower = lower = = THERMAL_NO_LIMIT ? 0 : lower ;
upper = upper = = THERMAL_NO_LIMIT ? max_state : upper ;
if ( lower > upper | | upper > max_state )
return - EINVAL ;
2008-01-17 10:51:08 +03:00
dev =
2012-06-27 06:08:19 +04:00
kzalloc ( sizeof ( struct thermal_instance ) , GFP_KERNEL ) ;
2008-01-17 10:51:08 +03:00
if ( ! dev )
return - ENOMEM ;
dev - > tz = tz ;
dev - > cdev = cdev ;
dev - > trip = trip ;
2012-06-26 12:35:57 +04:00
dev - > upper = upper ;
dev - > lower = lower ;
2012-06-27 10:13:04 +04:00
dev - > target = THERMAL_NO_TARGET ;
2012-06-26 12:27:22 +04:00
2008-01-17 10:51:08 +03:00
result = get_idr ( & tz - > idr , & tz - > lock , & dev - > id ) ;
if ( result )
goto free_mem ;
sprintf ( dev - > name , " cdev%d " , dev - > id ) ;
result =
sysfs_create_link ( & tz - > device . kobj , & cdev - > device . kobj , dev - > name ) ;
if ( result )
goto release_idr ;
sprintf ( dev - > attr_name , " cdev%d_trip_point " , dev - > id ) ;
2010-04-07 01:34:51 +04:00
sysfs_attr_init ( & dev - > attr . attr ) ;
2008-01-17 10:51:08 +03:00
dev - > attr . attr . name = dev - > attr_name ;
dev - > attr . attr . mode = 0444 ;
dev - > attr . show = thermal_cooling_device_trip_point_show ;
result = device_create_file ( & tz - > device , & dev - > attr ) ;
if ( result )
goto remove_symbol_link ;
mutex_lock ( & tz - > lock ) ;
2012-07-24 12:56:21 +04:00
mutex_lock ( & cdev - > lock ) ;
2012-06-27 06:09:36 +04:00
list_for_each_entry ( pos , & tz - > thermal_instances , tz_node )
2008-01-17 10:51:08 +03:00
if ( pos - > tz = = tz & & pos - > trip = = trip & & pos - > cdev = = cdev ) {
result = - EEXIST ;
break ;
}
2012-06-27 10:11:52 +04:00
if ( ! result ) {
2012-06-27 06:09:36 +04:00
list_add_tail ( & dev - > tz_node , & tz - > thermal_instances ) ;
2012-06-27 10:11:52 +04:00
list_add_tail ( & dev - > cdev_node , & cdev - > thermal_instances ) ;
}
2012-07-24 12:56:21 +04:00
mutex_unlock ( & cdev - > lock ) ;
2008-01-17 10:51:08 +03:00
mutex_unlock ( & tz - > lock ) ;
if ( ! result )
return 0 ;
device_remove_file ( & tz - > device , & dev - > attr ) ;
2012-03-21 23:55:02 +04:00
remove_symbol_link :
2008-01-17 10:51:08 +03:00
sysfs_remove_link ( & tz - > device . kobj , dev - > name ) ;
2012-03-21 23:55:02 +04:00
release_idr :
2008-01-17 10:51:08 +03:00
release_idr ( & tz - > idr , & tz - > lock , dev - > id ) ;
2012-03-21 23:55:02 +04:00
free_mem :
2008-01-17 10:51:08 +03:00
kfree ( dev ) ;
return result ;
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_zone_bind_cooling_device ) ;
2008-01-17 10:51:08 +03:00
/**
* thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
* @ tz : thermal zone device
* @ trip : indicates which trip point the cooling devices is
* associated with in this thermal zone .
* @ cdev : thermal cooling device
2008-02-08 00:55:08 +03:00
*
* This function is usually called in the thermal zone device . unbind callback .
2008-01-17 10:51:08 +03:00
*/
int thermal_zone_unbind_cooling_device ( struct thermal_zone_device * tz ,
int trip ,
struct thermal_cooling_device * cdev )
{
2012-06-27 06:08:19 +04:00
struct thermal_instance * pos , * next ;
2008-01-17 10:51:08 +03:00
mutex_lock ( & tz - > lock ) ;
2012-07-24 12:56:21 +04:00
mutex_lock ( & cdev - > lock ) ;
2012-06-27 06:09:36 +04:00
list_for_each_entry_safe ( pos , next , & tz - > thermal_instances , tz_node ) {
2008-02-08 00:55:08 +03:00
if ( pos - > tz = = tz & & pos - > trip = = trip & & pos - > cdev = = cdev ) {
2012-06-27 06:09:36 +04:00
list_del ( & pos - > tz_node ) ;
2012-06-27 10:11:52 +04:00
list_del ( & pos - > cdev_node ) ;
2012-07-24 12:56:21 +04:00
mutex_unlock ( & cdev - > lock ) ;
2008-01-17 10:51:08 +03:00
mutex_unlock ( & tz - > lock ) ;
goto unbind ;
}
}
2012-07-24 12:56:21 +04:00
mutex_unlock ( & cdev - > lock ) ;
2008-01-17 10:51:08 +03:00
mutex_unlock ( & tz - > lock ) ;
return - ENODEV ;
2012-03-21 23:55:02 +04:00
unbind :
2008-01-17 10:51:08 +03:00
device_remove_file ( & tz - > device , & pos - > attr ) ;
sysfs_remove_link ( & tz - > device . kobj , pos - > name ) ;
release_idr ( & tz - > idr , & tz - > lock , pos - > id ) ;
kfree ( pos ) ;
return 0 ;
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_zone_unbind_cooling_device ) ;
2008-01-17 10:51:08 +03:00
static void thermal_release ( struct device * dev )
{
struct thermal_zone_device * tz ;
struct thermal_cooling_device * cdev ;
2012-03-21 23:55:02 +04:00
if ( ! strncmp ( dev_name ( dev ) , " thermal_zone " ,
sizeof ( " thermal_zone " ) - 1 ) ) {
2008-01-17 10:51:08 +03:00
tz = to_thermal_zone ( dev ) ;
kfree ( tz ) ;
} else {
cdev = to_cooling_device ( dev ) ;
kfree ( cdev ) ;
}
}
static struct class thermal_class = {
. name = " thermal " ,
. dev_release = thermal_release ,
} ;
/**
* thermal_cooling_device_register - register a new thermal cooling device
* @ type : the thermal cooling device type .
* @ devdata : device private data .
* @ ops : standard thermal cooling devices callbacks .
*/
2012-03-21 23:55:02 +04:00
struct thermal_cooling_device *
thermal_cooling_device_register ( char * type , void * devdata ,
const struct thermal_cooling_device_ops * ops )
2008-01-17 10:51:08 +03:00
{
struct thermal_cooling_device * cdev ;
int result ;
2012-08-08 09:36:45 +04:00
if ( type & & strlen ( type ) > = THERMAL_NAME_LENGTH )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - EINVAL ) ;
2008-01-17 10:51:08 +03:00
if ( ! ops | | ! ops - > get_max_state | | ! ops - > get_cur_state | |
2008-02-08 00:55:08 +03:00
! ops - > set_cur_state )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - EINVAL ) ;
2008-01-17 10:51:08 +03:00
cdev = kzalloc ( sizeof ( struct thermal_cooling_device ) , GFP_KERNEL ) ;
if ( ! cdev )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - ENOMEM ) ;
2008-01-17 10:51:08 +03:00
result = get_idr ( & thermal_cdev_idr , & thermal_idr_lock , & cdev - > id ) ;
if ( result ) {
kfree ( cdev ) ;
2008-02-15 08:59:50 +03:00
return ERR_PTR ( result ) ;
2008-01-17 10:51:08 +03:00
}
2013-04-24 01:48:12 +04:00
strlcpy ( cdev - > type , type ? : " " , sizeof ( cdev - > type ) ) ;
2012-07-24 12:56:21 +04:00
mutex_init ( & cdev - > lock ) ;
2012-06-27 10:11:52 +04:00
INIT_LIST_HEAD ( & cdev - > thermal_instances ) ;
2008-01-17 10:51:08 +03:00
cdev - > ops = ops ;
2012-06-27 10:13:04 +04:00
cdev - > updated = true ;
2008-01-17 10:51:08 +03:00
cdev - > device . class = & thermal_class ;
cdev - > devdata = devdata ;
2009-01-06 21:44:37 +03:00
dev_set_name ( & cdev - > device , " cooling_device%d " , cdev - > id ) ;
2008-01-17 10:51:08 +03:00
result = device_register ( & cdev - > device ) ;
if ( result ) {
release_idr ( & thermal_cdev_idr , & thermal_idr_lock , cdev - > id ) ;
kfree ( cdev ) ;
2008-02-15 08:59:50 +03:00
return ERR_PTR ( result ) ;
2008-01-17 10:51:08 +03:00
}
/* sys I/F */
if ( type ) {
2008-02-08 00:55:08 +03:00
result = device_create_file ( & cdev - > device , & dev_attr_cdev_type ) ;
2008-01-17 10:51:08 +03:00
if ( result )
goto unregister ;
}
result = device_create_file ( & cdev - > device , & dev_attr_max_state ) ;
if ( result )
goto unregister ;
result = device_create_file ( & cdev - > device , & dev_attr_cur_state ) ;
if ( result )
goto unregister ;
2012-09-18 09:34:59 +04:00
/* Add 'this' new cdev to the global cdev list */
2008-01-17 10:51:08 +03:00
mutex_lock ( & thermal_list_lock ) ;
list_add ( & cdev - > node , & thermal_cdev_list ) ;
mutex_unlock ( & thermal_list_lock ) ;
2012-09-18 09:34:59 +04:00
/* Update binding information for 'this' new cdev */
bind_cdev ( cdev ) ;
return cdev ;
2008-01-17 10:51:08 +03:00
2012-03-21 23:55:02 +04:00
unregister :
2008-01-17 10:51:08 +03:00
release_idr ( & thermal_cdev_idr , & thermal_idr_lock , cdev - > id ) ;
device_unregister ( & cdev - > device ) ;
2008-02-15 08:59:50 +03:00
return ERR_PTR ( result ) ;
2008-01-17 10:51:08 +03:00
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_cooling_device_register ) ;
2008-01-17 10:51:08 +03:00
/**
* thermal_cooling_device_unregister - removes the registered thermal cooling device
* @ cdev : the thermal cooling device to remove .
*
* thermal_cooling_device_unregister ( ) must be called when the device is no
* longer needed .
*/
2012-09-18 09:34:59 +04:00
void thermal_cooling_device_unregister ( struct thermal_cooling_device * cdev )
2008-01-17 10:51:08 +03:00
{
2012-09-18 09:34:59 +04:00
int i ;
const struct thermal_zone_params * tzp ;
2008-01-17 10:51:08 +03:00
struct thermal_zone_device * tz ;
struct thermal_cooling_device * pos = NULL ;
if ( ! cdev )
return ;
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( pos , & thermal_cdev_list , node )
if ( pos = = cdev )
break ;
if ( pos ! = cdev ) {
/* thermal cooling device not found */
mutex_unlock ( & thermal_list_lock ) ;
return ;
}
list_del ( & cdev - > node ) ;
2012-09-18 09:34:59 +04:00
/* Unbind all thermal zones associated with 'this' cdev */
2008-01-17 10:51:08 +03:00
list_for_each_entry ( tz , & thermal_tz_list , node ) {
2012-09-18 09:34:59 +04:00
if ( tz - > ops - > unbind ) {
tz - > ops - > unbind ( tz , cdev ) ;
continue ;
}
if ( ! tz - > tzp | | ! tz - > tzp - > tbp )
2008-01-17 10:51:08 +03:00
continue ;
2012-09-18 09:34:59 +04:00
tzp = tz - > tzp ;
for ( i = 0 ; i < tzp - > num_tbps ; i + + ) {
if ( tzp - > tbp [ i ] . cdev = = cdev ) {
__unbind ( tz , tzp - > tbp [ i ] . trip_mask , cdev ) ;
tzp - > tbp [ i ] . cdev = NULL ;
}
}
2008-01-17 10:51:08 +03:00
}
2012-09-18 09:34:59 +04:00
2008-01-17 10:51:08 +03:00
mutex_unlock ( & thermal_list_lock ) ;
2012-09-18 09:34:59 +04:00
2008-01-17 10:51:08 +03:00
if ( cdev - > type [ 0 ] )
2008-02-08 00:55:08 +03:00
device_remove_file ( & cdev - > device , & dev_attr_cdev_type ) ;
2008-01-17 10:51:08 +03:00
device_remove_file ( & cdev - > device , & dev_attr_max_state ) ;
device_remove_file ( & cdev - > device , & dev_attr_cur_state ) ;
release_idr ( & thermal_cdev_idr , & thermal_idr_lock , cdev - > id ) ;
device_unregister ( & cdev - > device ) ;
return ;
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_cooling_device_unregister ) ;
2008-01-17 10:51:08 +03:00
2012-09-18 09:35:00 +04:00
void thermal_cdev_update ( struct thermal_cooling_device * cdev )
2012-06-27 10:13:04 +04:00
{
struct thermal_instance * instance ;
unsigned long target = 0 ;
/* cooling device is updated*/
if ( cdev - > updated )
return ;
2012-07-24 12:56:21 +04:00
mutex_lock ( & cdev - > lock ) ;
2012-06-27 10:13:04 +04:00
/* Make sure cdev enters the deepest cooling state */
list_for_each_entry ( instance , & cdev - > thermal_instances , cdev_node ) {
if ( instance - > target = = THERMAL_NO_TARGET )
continue ;
if ( instance - > target > target )
target = instance - > target ;
}
2012-07-24 12:56:21 +04:00
mutex_unlock ( & cdev - > lock ) ;
2012-06-27 10:13:04 +04:00
cdev - > ops - > set_cur_state ( cdev , target ) ;
cdev - > updated = true ;
}
2012-09-18 09:35:00 +04:00
EXPORT_SYMBOL ( thermal_cdev_update ) ;
2012-06-27 10:13:04 +04:00
2012-09-18 09:35:05 +04:00
/**
2013-04-24 01:48:14 +04:00
* thermal_notify_framework - Sensor drivers use this API to notify framework
2012-09-18 09:35:05 +04:00
* @ tz : thermal zone device
* @ trip : indicates which trip point has been crossed
*
* This function handles the trip events from sensor drivers . It starts
* throttling the cooling devices according to the policy configured .
* For CRITICAL and HOT trip points , this notifies the respective drivers ,
* and does actual throttling for other trip points i . e ACTIVE and PASSIVE .
* The throttling policy is based on the configured platform data ; if no
* platform data is provided , this uses the step_wise throttling policy .
*/
2013-04-24 01:48:14 +04:00
void thermal_notify_framework ( struct thermal_zone_device * tz , int trip )
2012-09-18 09:35:05 +04:00
{
handle_thermal_trip ( tz , trip ) ;
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_notify_framework ) ;
2012-09-18 09:35:05 +04:00
2012-07-25 06:10:58 +04:00
/**
* create_trip_attrs - create attributes for trip points
* @ tz : the thermal zone device
* @ mask : Writeable trip point bitmap .
*/
static int create_trip_attrs ( struct thermal_zone_device * tz , int mask )
{
int indx ;
2012-07-25 06:10:59 +04:00
int size = sizeof ( struct thermal_attr ) * tz - > trips ;
2012-07-25 06:10:58 +04:00
2012-07-25 06:10:59 +04:00
tz - > trip_type_attrs = kzalloc ( size , GFP_KERNEL ) ;
2012-07-25 06:10:58 +04:00
if ( ! tz - > trip_type_attrs )
return - ENOMEM ;
2012-07-25 06:10:59 +04:00
tz - > trip_temp_attrs = kzalloc ( size , GFP_KERNEL ) ;
2012-07-25 06:10:58 +04:00
if ( ! tz - > trip_temp_attrs ) {
kfree ( tz - > trip_type_attrs ) ;
return - ENOMEM ;
}
2012-07-25 06:10:59 +04:00
if ( tz - > ops - > get_trip_hyst ) {
tz - > trip_hyst_attrs = kzalloc ( size , GFP_KERNEL ) ;
if ( ! tz - > trip_hyst_attrs ) {
kfree ( tz - > trip_type_attrs ) ;
kfree ( tz - > trip_temp_attrs ) ;
return - ENOMEM ;
}
}
2012-07-25 06:10:58 +04:00
2012-07-25 06:10:59 +04:00
for ( indx = 0 ; indx < tz - > trips ; indx + + ) {
2012-07-25 06:10:58 +04:00
/* create trip type attribute */
snprintf ( tz - > trip_type_attrs [ indx ] . name , THERMAL_NAME_LENGTH ,
" trip_point_%d_type " , indx ) ;
sysfs_attr_init ( & tz - > trip_type_attrs [ indx ] . attr . attr ) ;
tz - > trip_type_attrs [ indx ] . attr . attr . name =
tz - > trip_type_attrs [ indx ] . name ;
tz - > trip_type_attrs [ indx ] . attr . attr . mode = S_IRUGO ;
tz - > trip_type_attrs [ indx ] . attr . show = trip_point_type_show ;
device_create_file ( & tz - > device ,
& tz - > trip_type_attrs [ indx ] . attr ) ;
/* create trip temp attribute */
snprintf ( tz - > trip_temp_attrs [ indx ] . name , THERMAL_NAME_LENGTH ,
" trip_point_%d_temp " , indx ) ;
sysfs_attr_init ( & tz - > trip_temp_attrs [ indx ] . attr . attr ) ;
tz - > trip_temp_attrs [ indx ] . attr . attr . name =
tz - > trip_temp_attrs [ indx ] . name ;
tz - > trip_temp_attrs [ indx ] . attr . attr . mode = S_IRUGO ;
tz - > trip_temp_attrs [ indx ] . attr . show = trip_point_temp_show ;
if ( mask & ( 1 < < indx ) ) {
tz - > trip_temp_attrs [ indx ] . attr . attr . mode | = S_IWUSR ;
tz - > trip_temp_attrs [ indx ] . attr . store =
trip_point_temp_store ;
}
device_create_file ( & tz - > device ,
& tz - > trip_temp_attrs [ indx ] . attr ) ;
2012-07-25 06:10:59 +04:00
/* create Optional trip hyst attribute */
if ( ! tz - > ops - > get_trip_hyst )
continue ;
snprintf ( tz - > trip_hyst_attrs [ indx ] . name , THERMAL_NAME_LENGTH ,
" trip_point_%d_hyst " , indx ) ;
sysfs_attr_init ( & tz - > trip_hyst_attrs [ indx ] . attr . attr ) ;
tz - > trip_hyst_attrs [ indx ] . attr . attr . name =
tz - > trip_hyst_attrs [ indx ] . name ;
tz - > trip_hyst_attrs [ indx ] . attr . attr . mode = S_IRUGO ;
tz - > trip_hyst_attrs [ indx ] . attr . show = trip_point_hyst_show ;
if ( tz - > ops - > set_trip_hyst ) {
tz - > trip_hyst_attrs [ indx ] . attr . attr . mode | = S_IWUSR ;
tz - > trip_hyst_attrs [ indx ] . attr . store =
trip_point_hyst_store ;
}
device_create_file ( & tz - > device ,
& tz - > trip_hyst_attrs [ indx ] . attr ) ;
2012-07-25 06:10:58 +04:00
}
return 0 ;
}
static void remove_trip_attrs ( struct thermal_zone_device * tz )
{
int indx ;
for ( indx = 0 ; indx < tz - > trips ; indx + + ) {
device_remove_file ( & tz - > device ,
& tz - > trip_type_attrs [ indx ] . attr ) ;
device_remove_file ( & tz - > device ,
& tz - > trip_temp_attrs [ indx ] . attr ) ;
2012-07-25 06:10:59 +04:00
if ( tz - > ops - > get_trip_hyst )
device_remove_file ( & tz - > device ,
& tz - > trip_hyst_attrs [ indx ] . attr ) ;
2012-07-25 06:10:58 +04:00
}
kfree ( tz - > trip_type_attrs ) ;
kfree ( tz - > trip_temp_attrs ) ;
2012-07-25 06:10:59 +04:00
kfree ( tz - > trip_hyst_attrs ) ;
2012-07-25 06:10:58 +04:00
}
2008-01-17 10:51:08 +03:00
/**
* thermal_zone_device_register - register a new thermal zone device
* @ type : the thermal zone device type
* @ trips : the number of trip points the thermal zone support
2012-07-25 06:10:58 +04:00
* @ mask : a bit string indicating the writeablility of trip points
2008-01-17 10:51:08 +03:00
* @ devdata : private device data
* @ ops : standard thermal zone device callbacks
2012-09-18 09:34:56 +04:00
* @ tzp : thermal zone platform parameters
2008-12-03 20:55:32 +03:00
* @ passive_delay : number of milliseconds to wait between polls when
* performing passive cooling
* @ polling_delay : number of milliseconds to wait between polls when checking
* whether trip points have been crossed ( 0 for interrupt
* driven systems )
2008-01-17 10:51:08 +03:00
*
* thermal_zone_device_unregister ( ) must be called when the device is no
2012-06-27 05:51:12 +04:00
* longer needed . The passive cooling depends on the . get_trend ( ) return value .
2008-01-17 10:51:08 +03:00
*/
2012-07-31 15:39:30 +04:00
struct thermal_zone_device * thermal_zone_device_register ( const char * type ,
2012-07-25 06:10:58 +04:00
int trips , int mask , void * devdata ,
2010-11-11 18:27:29 +03:00
const struct thermal_zone_device_ops * ops ,
2012-09-18 09:34:56 +04:00
const struct thermal_zone_params * tzp ,
2012-06-27 05:51:12 +04:00
int passive_delay , int polling_delay )
2008-01-17 10:51:08 +03:00
{
struct thermal_zone_device * tz ;
2008-12-03 21:00:38 +03:00
enum thermal_trip_type trip_type ;
2008-01-17 10:51:08 +03:00
int result ;
int count ;
2008-12-03 21:00:38 +03:00
int passive = 0 ;
2008-01-17 10:51:08 +03:00
2012-08-08 09:36:45 +04:00
if ( type & & strlen ( type ) > = THERMAL_NAME_LENGTH )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - EINVAL ) ;
2008-01-17 10:51:08 +03:00
2012-07-25 06:10:58 +04:00
if ( trips > THERMAL_MAX_TRIPS | | trips < 0 | | mask > > trips )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - EINVAL ) ;
2008-01-17 10:51:08 +03:00
if ( ! ops | | ! ops - > get_temp )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - EINVAL ) ;
2008-01-17 10:51:08 +03:00
2013-01-02 19:29:42 +04:00
if ( trips > 0 & & ! ops - > get_trip_type )
return ERR_PTR ( - EINVAL ) ;
2008-01-17 10:51:08 +03:00
tz = kzalloc ( sizeof ( struct thermal_zone_device ) , GFP_KERNEL ) ;
if ( ! tz )
2008-02-15 08:59:50 +03:00
return ERR_PTR ( - ENOMEM ) ;
2008-01-17 10:51:08 +03:00
2012-06-27 06:09:00 +04:00
INIT_LIST_HEAD ( & tz - > thermal_instances ) ;
2008-01-17 10:51:08 +03:00
idr_init ( & tz - > idr ) ;
mutex_init ( & tz - > lock ) ;
result = get_idr ( & thermal_tz_idr , & thermal_idr_lock , & tz - > id ) ;
if ( result ) {
kfree ( tz ) ;
2008-02-15 08:59:50 +03:00
return ERR_PTR ( result ) ;
2008-01-17 10:51:08 +03:00
}
2013-04-24 01:48:12 +04:00
strlcpy ( tz - > type , type ? : " " , sizeof ( tz - > type ) ) ;
2008-01-17 10:51:08 +03:00
tz - > ops = ops ;
2012-09-18 09:34:56 +04:00
tz - > tzp = tzp ;
2008-01-17 10:51:08 +03:00
tz - > device . class = & thermal_class ;
tz - > devdata = devdata ;
tz - > trips = trips ;
2008-12-03 20:55:32 +03:00
tz - > passive_delay = passive_delay ;
tz - > polling_delay = polling_delay ;
2009-01-06 21:44:37 +03:00
dev_set_name ( & tz - > device , " thermal_zone%d " , tz - > id ) ;
2008-01-17 10:51:08 +03:00
result = device_register ( & tz - > device ) ;
if ( result ) {
release_idr ( & thermal_tz_idr , & thermal_idr_lock , tz - > id ) ;
kfree ( tz ) ;
2008-02-15 08:59:50 +03:00
return ERR_PTR ( result ) ;
2008-01-17 10:51:08 +03:00
}
/* sys I/F */
if ( type ) {
result = device_create_file ( & tz - > device , & dev_attr_type ) ;
if ( result )
goto unregister ;
}
result = device_create_file ( & tz - > device , & dev_attr_temp ) ;
if ( result )
goto unregister ;
if ( ops - > get_mode ) {
result = device_create_file ( & tz - > device , & dev_attr_mode ) ;
if ( result )
goto unregister ;
}
2012-07-25 06:10:58 +04:00
result = create_trip_attrs ( tz , mask ) ;
if ( result )
goto unregister ;
2008-01-17 10:51:08 +03:00
for ( count = 0 ; count < trips ; count + + ) {
2008-12-03 21:00:38 +03:00
tz - > ops - > get_trip_type ( tz , count , & trip_type ) ;
if ( trip_type = = THERMAL_TRIP_PASSIVE )
passive = 1 ;
2008-01-17 10:51:08 +03:00
}
2012-09-18 09:34:58 +04:00
if ( ! passive ) {
result = device_create_file ( & tz - > device , & dev_attr_passive ) ;
if ( result )
goto unregister ;
}
2008-12-03 21:00:38 +03:00
2013-02-04 04:30:15 +04:00
# ifdef CONFIG_THERMAL_EMULATION
result = device_create_file ( & tz - > device , & dev_attr_emul_temp ) ;
if ( result )
goto unregister ;
# endif
2012-09-18 09:34:58 +04:00
/* Create policy attribute */
result = device_create_file ( & tz - > device , & dev_attr_policy ) ;
2008-12-03 21:00:38 +03:00
if ( result )
goto unregister ;
2012-09-18 09:34:57 +04:00
/* Update 'this' zone's governor information */
mutex_lock ( & thermal_governor_lock ) ;
if ( tz - > tzp )
tz - > governor = __find_governor ( tz - > tzp - > governor_name ) ;
else
tz - > governor = __find_governor ( DEFAULT_THERMAL_GOVERNOR ) ;
mutex_unlock ( & thermal_governor_lock ) ;
2008-04-21 12:07:52 +04:00
result = thermal_add_hwmon_sysfs ( tz ) ;
if ( result )
goto unregister ;
2008-01-17 10:51:08 +03:00
mutex_lock ( & thermal_list_lock ) ;
list_add_tail ( & tz - > node , & thermal_tz_list ) ;
mutex_unlock ( & thermal_list_lock ) ;
2012-09-18 09:34:59 +04:00
/* Bind cooling devices for this zone */
bind_tz ( tz ) ;
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INIT_DELAYED_WORK ( & ( tz - > poll_queue ) , thermal_zone_device_check ) ;
thermal_zone_device_update ( tz ) ;
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if ( ! result )
return tz ;
2012-03-21 23:55:02 +04:00
unregister :
2008-01-17 10:51:08 +03:00
release_idr ( & thermal_tz_idr , & thermal_idr_lock , tz - > id ) ;
device_unregister ( & tz - > device ) ;
2008-02-15 08:59:50 +03:00
return ERR_PTR ( result ) ;
2008-01-17 10:51:08 +03:00
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_zone_device_register ) ;
2008-01-17 10:51:08 +03:00
/**
* thermal_device_unregister - removes the registered thermal zone device
* @ tz : the thermal zone device to remove
*/
void thermal_zone_device_unregister ( struct thermal_zone_device * tz )
{
2012-09-18 09:34:59 +04:00
int i ;
const struct thermal_zone_params * tzp ;
2008-01-17 10:51:08 +03:00
struct thermal_cooling_device * cdev ;
struct thermal_zone_device * pos = NULL ;
if ( ! tz )
return ;
2012-09-18 09:34:59 +04:00
tzp = tz - > tzp ;
2008-01-17 10:51:08 +03:00
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( pos , & thermal_tz_list , node )
if ( pos = = tz )
break ;
if ( pos ! = tz ) {
/* thermal zone device not found */
mutex_unlock ( & thermal_list_lock ) ;
return ;
}
list_del ( & tz - > node ) ;
2012-09-18 09:34:59 +04:00
/* Unbind all cdevs associated with 'this' thermal zone */
list_for_each_entry ( cdev , & thermal_cdev_list , node ) {
if ( tz - > ops - > unbind ) {
tz - > ops - > unbind ( tz , cdev ) ;
continue ;
}
if ( ! tzp | | ! tzp - > tbp )
break ;
for ( i = 0 ; i < tzp - > num_tbps ; i + + ) {
if ( tzp - > tbp [ i ] . cdev = = cdev ) {
__unbind ( tz , tzp - > tbp [ i ] . trip_mask , cdev ) ;
tzp - > tbp [ i ] . cdev = NULL ;
}
}
}
2008-01-17 10:51:08 +03:00
mutex_unlock ( & thermal_list_lock ) ;
2008-12-03 20:55:32 +03:00
thermal_zone_device_set_polling ( tz , 0 ) ;
2008-01-17 10:51:08 +03:00
if ( tz - > type [ 0 ] )
device_remove_file ( & tz - > device , & dev_attr_type ) ;
device_remove_file ( & tz - > device , & dev_attr_temp ) ;
if ( tz - > ops - > get_mode )
device_remove_file ( & tz - > device , & dev_attr_mode ) ;
2012-09-18 09:34:58 +04:00
device_remove_file ( & tz - > device , & dev_attr_policy ) ;
2012-07-25 06:10:58 +04:00
remove_trip_attrs ( tz ) ;
2012-09-18 09:34:57 +04:00
tz - > governor = NULL ;
2008-01-17 10:51:08 +03:00
2008-04-21 12:07:52 +04:00
thermal_remove_hwmon_sysfs ( tz ) ;
2008-01-17 10:51:08 +03:00
release_idr ( & thermal_tz_idr , & thermal_idr_lock , tz - > id ) ;
idr_destroy ( & tz - > idr ) ;
mutex_destroy ( & tz - > lock ) ;
device_unregister ( & tz - > device ) ;
return ;
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_zone_device_unregister ) ;
2008-01-17 10:51:08 +03:00
2013-04-05 16:32:28 +04:00
/**
* thermal_zone_get_zone_by_name ( ) - search for a zone and returns its ref
* @ name : thermal zone name to fetch the temperature
*
* When only one zone is found with the passed name , returns a reference to it .
*
* Return : On success returns a reference to an unique thermal zone with
* matching name equals to @ name , an ERR_PTR otherwise ( - EINVAL for invalid
* paramenters , - ENODEV for not found and - EEXIST for multiple matches ) .
*/
struct thermal_zone_device * thermal_zone_get_zone_by_name ( const char * name )
{
struct thermal_zone_device * pos = NULL , * ref = ERR_PTR ( - EINVAL ) ;
unsigned int found = 0 ;
if ( ! name )
goto exit ;
mutex_lock ( & thermal_list_lock ) ;
list_for_each_entry ( pos , & thermal_tz_list , node )
if ( ! strnicmp ( name , pos - > type , THERMAL_NAME_LENGTH ) ) {
found + + ;
ref = pos ;
}
mutex_unlock ( & thermal_list_lock ) ;
/* nothing has been found, thus an error code for it */
if ( found = = 0 )
ref = ERR_PTR ( - ENODEV ) ;
else if ( found > 1 )
/* Success only when an unique zone is found */
ref = ERR_PTR ( - EEXIST ) ;
exit :
return ref ;
}
EXPORT_SYMBOL_GPL ( thermal_zone_get_zone_by_name ) ;
2011-03-01 03:12:19 +03:00
# ifdef CONFIG_NET
static struct genl_family thermal_event_genl_family = {
. id = GENL_ID_GENERATE ,
. name = THERMAL_GENL_FAMILY_NAME ,
. version = THERMAL_GENL_VERSION ,
. maxattr = THERMAL_GENL_ATTR_MAX ,
} ;
static struct genl_multicast_group thermal_event_mcgrp = {
. name = THERMAL_GENL_MCAST_GROUP_NAME ,
} ;
2013-01-02 19:29:39 +04:00
int thermal_generate_netlink_event ( struct thermal_zone_device * tz ,
enum events event )
2010-10-27 02:03:29 +04:00
{
struct sk_buff * skb ;
struct nlattr * attr ;
struct thermal_genl_event * thermal_event ;
void * msg_header ;
int size ;
int result ;
2012-03-21 23:55:00 +04:00
static unsigned int thermal_event_seqnum ;
2010-10-27 02:03:29 +04:00
2013-01-02 19:29:39 +04:00
if ( ! tz )
return - EINVAL ;
2010-10-27 02:03:29 +04:00
/* allocate memory */
2012-03-21 23:55:01 +04:00
size = nla_total_size ( sizeof ( struct thermal_genl_event ) ) +
nla_total_size ( 0 ) ;
2010-10-27 02:03:29 +04:00
skb = genlmsg_new ( size , GFP_ATOMIC ) ;
if ( ! skb )
return - ENOMEM ;
/* add the genetlink message header */
msg_header = genlmsg_put ( skb , 0 , thermal_event_seqnum + + ,
& thermal_event_genl_family , 0 ,
THERMAL_GENL_CMD_EVENT ) ;
if ( ! msg_header ) {
nlmsg_free ( skb ) ;
return - ENOMEM ;
}
/* fill the data */
2012-03-21 23:55:01 +04:00
attr = nla_reserve ( skb , THERMAL_GENL_ATTR_EVENT ,
sizeof ( struct thermal_genl_event ) ) ;
2010-10-27 02:03:29 +04:00
if ( ! attr ) {
nlmsg_free ( skb ) ;
return - EINVAL ;
}
thermal_event = nla_data ( attr ) ;
if ( ! thermal_event ) {
nlmsg_free ( skb ) ;
return - EINVAL ;
}
memset ( thermal_event , 0 , sizeof ( struct thermal_genl_event ) ) ;
2013-01-02 19:29:39 +04:00
thermal_event - > orig = tz - > id ;
2010-10-27 02:03:29 +04:00
thermal_event - > event = event ;
/* send multicast genetlink message */
result = genlmsg_end ( skb , msg_header ) ;
if ( result < 0 ) {
nlmsg_free ( skb ) ;
return result ;
}
result = genlmsg_multicast ( skb , 0 , thermal_event_mcgrp . id , GFP_ATOMIC ) ;
if ( result )
2013-01-02 19:29:41 +04:00
dev_err ( & tz - > device , " Failed to send netlink event:%d " , result ) ;
2010-10-27 02:03:29 +04:00
return result ;
}
2013-04-24 01:48:15 +04:00
EXPORT_SYMBOL_GPL ( thermal_generate_netlink_event ) ;
2010-10-27 02:03:29 +04:00
static int genetlink_init ( void )
{
int result ;
result = genl_register_family ( & thermal_event_genl_family ) ;
if ( result )
return result ;
result = genl_register_mc_group ( & thermal_event_genl_family ,
& thermal_event_mcgrp ) ;
if ( result )
genl_unregister_family ( & thermal_event_genl_family ) ;
return result ;
}
2011-03-01 03:12:19 +03:00
static void genetlink_exit ( void )
{
genl_unregister_family ( & thermal_event_genl_family ) ;
}
# else /* !CONFIG_NET */
static inline int genetlink_init ( void ) { return 0 ; }
static inline void genetlink_exit ( void ) { }
# endif /* !CONFIG_NET */
2013-03-26 12:38:29 +04:00
static int __init thermal_register_governors ( void )
{
int result ;
result = thermal_gov_step_wise_register ( ) ;
if ( result )
return result ;
result = thermal_gov_fair_share_register ( ) ;
if ( result )
return result ;
return thermal_gov_user_space_register ( ) ;
}
static void thermal_unregister_governors ( void )
{
thermal_gov_step_wise_unregister ( ) ;
thermal_gov_fair_share_unregister ( ) ;
thermal_gov_user_space_unregister ( ) ;
}
2008-01-17 10:51:08 +03:00
static int __init thermal_init ( void )
{
2013-03-26 12:38:29 +04:00
int result ;
result = thermal_register_governors ( ) ;
if ( result )
goto error ;
2008-01-17 10:51:08 +03:00
result = class_register ( & thermal_class ) ;
2013-03-26 12:38:29 +04:00
if ( result )
goto unregister_governors ;
2010-10-27 02:03:29 +04:00
result = genetlink_init ( ) ;
2013-03-26 12:38:29 +04:00
if ( result )
goto unregister_class ;
return 0 ;
unregister_governors :
thermal_unregister_governors ( ) ;
unregister_class :
class_unregister ( & thermal_class ) ;
error :
idr_destroy ( & thermal_tz_idr ) ;
idr_destroy ( & thermal_cdev_idr ) ;
mutex_destroy ( & thermal_idr_lock ) ;
mutex_destroy ( & thermal_list_lock ) ;
mutex_destroy ( & thermal_governor_lock ) ;
2008-01-17 10:51:08 +03:00
return result ;
}
static void __exit thermal_exit ( void )
{
2013-03-26 12:38:29 +04:00
genetlink_exit ( ) ;
2008-01-17 10:51:08 +03:00
class_unregister ( & thermal_class ) ;
2013-03-26 12:38:29 +04:00
thermal_unregister_governors ( ) ;
2008-01-17 10:51:08 +03:00
idr_destroy ( & thermal_tz_idr ) ;
idr_destroy ( & thermal_cdev_idr ) ;
mutex_destroy ( & thermal_idr_lock ) ;
mutex_destroy ( & thermal_list_lock ) ;
2013-03-26 12:38:29 +04:00
mutex_destroy ( & thermal_governor_lock ) ;
2008-01-17 10:51:08 +03:00
}
2010-10-27 02:03:29 +04:00
fs_initcall ( thermal_init ) ;
2008-01-17 10:51:08 +03:00
module_exit ( thermal_exit ) ;