diff options
| author | Punit Agrawal <punit.agrawal@arm.com> | 2015-03-03 10:43:03 +0000 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2015-05-04 21:27:53 -0700 |
| commit | 35e946447f22d722e06702f4f040f7b108cafbbe (patch) | |
| tree | 7bc81f7ac621f8af0d3e4dcd200cf2e139af4b2b /drivers/thermal | |
| parent | 4abe602d5d2c7a64bde935acae4b15e49c8b3238 (diff) | |
thermal: core: Add Kconfig option to enable writable trips
Add a Kconfig option to allow system integrators to control whether
userspace tools can change trip temperatures. This option overrides
the thermal zone setup in the driver code and must be enabled for
platform specified writable trips to come into effect.
The original behaviour of requiring root privileges to change trip
temperatures remains unchanged.
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/thermal/thermal_core.c | 3 |
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index a1b43eab0a70..46bdecf260e5 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -42,6 +42,17 @@ config THERMAL_OF Say 'Y' here if you need to build thermal infrastructure based on device tree. +config THERMAL_WRITABLE_TRIPS + bool "Enable writable trip points" + help + This option allows the system integrator to choose whether + trip temperatures can be changed from userspace. The + writable trips need to be specified when setting up the + thermal zone but the choice here takes precedence. + + Say 'Y' here if you would like to allow userspace tools to + change trip temperatures. + choice prompt "Default Thermal governor" default THERMAL_DEFAULT_GOV_STEP_WISE diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index b389bc2ec0fa..78bb9aa9d4e4 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1539,7 +1539,8 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask) 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)) { + if (IS_ENABLED(CONFIG_THERMAL_WRITABLE_TRIPS) && + mask & (1 << indx)) { tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; tz->trip_temp_attrs[indx].attr.store = trip_point_temp_store; |