| Message ID | 20220928210059.891387-2-daniel.lezcano@linaro.org (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
| Series | Rework the trip points creation | expand |
On Wed, Sep 28, 2022 at 11:01 PM Daniel Lezcano <daniel.lezcano@linaro.org> wrote: > > The thermal_zone_device_ops structure defines a set of ops family, > get_trip_temp(), get_trip_hyst(), get_trip_type(). Each of them is > returning a property of a trip point. > > The result is the code is calling the ops everywhere to get a trip > point which is supposed to be defined in the backend driver. It is a > non-sense as a thermal trip can be generic and used by the backend > driver to declare its trip points. > > Part of the thermal framework has been changed and all the OF thermal > drivers are using the same definition for the trip point and use a > thermal zone registration variant to pass those trip points which are > part of the thermal zone device structure. > > Consequently, we can use a generic function to get the trip points > when they are stored in the thermal zone device structure. > > This approach can be generalized to all the drivers and we can get rid > of the ops->get_trip_*. That will result to a much more simpler code > and make possible to rework how the thermal trip are handled in the > thermal core framework as discussed previously. > > This change adds a function thermal_zone_get_trip() where we get the > thermal trip point structure which contains all the properties (type, > temp, hyst) instead of doing multiple calls to ops->get_trip_*. > > That opens the door for trip point extension with more attributes. For > instance, replacing the trip points disabled bitmask with a 'disabled' > field in the structure. > > Here we replace all the calls to ops->get_trip_* in the thermal core > code with a call to the thermal_zone_get_trip() function. > > The thermal zone ops defines a callback to retrieve the critical > temperature. As the trip handling is being reworked, all the trip > points will be the same whatever the driver and consequently finding > the critical trip temperature will be just a loop to search for a > critical trip point type. > > Provide such a generic function, so we encapsulate the ops > get_crit_temp() which can be removed when all the backend drivers are > using the generic trip points handling. > > While at it, add the thermal_zone_get_num_trips() to encapsulate the > code more and reduce the grip with the thermal framework internals. > > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> > Reviewed-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > --- > drivers/thermal/thermal_core.c | 114 ++++++++++++++++++++++++------ > drivers/thermal/thermal_core.h | 2 + > drivers/thermal/thermal_helpers.c | 28 ++++---- > drivers/thermal/thermal_netlink.c | 21 +++--- > drivers/thermal/thermal_sysfs.c | 66 +++++++---------- > include/linux/thermal.h | 7 ++ > 6 files changed, 149 insertions(+), 89 deletions(-) > > diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c > index 4eab77d0e59c..16ef91dc102f 100644 > --- a/drivers/thermal/thermal_core.c > +++ b/drivers/thermal/thermal_core.c > @@ -341,35 +341,31 @@ static void handle_critical_trips(struct thermal_zone_device *tz, > tz->ops->critical(tz); > } > > -static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) > +static void handle_thermal_trip(struct thermal_zone_device *tz, int trip_id) > { > - enum thermal_trip_type type; > - int trip_temp, hyst = 0; > + struct thermal_trip trip; > > /* Ignore disabled trip points */ > - if (test_bit(trip, &tz->trips_disabled)) > + if (test_bit(trip_id, &tz->trips_disabled)) > return; > > - tz->ops->get_trip_temp(tz, trip, &trip_temp); > - tz->ops->get_trip_type(tz, trip, &type); > - if (tz->ops->get_trip_hyst) > - tz->ops->get_trip_hyst(tz, trip, &hyst); > + __thermal_zone_get_trip(tz, trip_id, &trip); > > if (tz->last_temperature != THERMAL_TEMP_INVALID) { > - if (tz->last_temperature < trip_temp && > - tz->temperature >= trip_temp) > - thermal_notify_tz_trip_up(tz->id, trip, > + if (tz->last_temperature < trip.temperature && > + tz->temperature >= trip.temperature) > + thermal_notify_tz_trip_up(tz->id, trip_id, > tz->temperature); > - if (tz->last_temperature >= trip_temp && > - tz->temperature < (trip_temp - hyst)) > - thermal_notify_tz_trip_down(tz->id, trip, > + if (tz->last_temperature >= trip.temperature && > + tz->temperature < (trip.temperature - trip.hysteresis)) > + thermal_notify_tz_trip_down(tz->id, trip_id, > tz->temperature); > } > > - if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) > - handle_critical_trips(tz, trip, trip_temp, type); > + if (trip.type == THERMAL_TRIP_CRITICAL || trip.type == THERMAL_TRIP_HOT) > + handle_critical_trips(tz, trip_id, trip.temperature, trip.type); > else > - handle_non_critical_trips(tz, trip); > + handle_non_critical_trips(tz, trip_id); > } > > static void update_temperature(struct thermal_zone_device *tz) > @@ -1142,6 +1138,79 @@ static void thermal_set_delay_jiffies(unsigned long *delay_jiffies, int delay_ms > *delay_jiffies = round_jiffies(*delay_jiffies); > } > > +int thermal_zone_get_num_trips(struct thermal_zone_device *tz) > +{ > + return tz->num_trips; > +} > +EXPORT_SYMBOL_GPL(thermal_zone_get_num_trips); > + > +int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp) > +{ > + int i, ret = -EINVAL; > + > + if (tz->ops->get_crit_temp) > + return tz->ops->get_crit_temp(tz, temp); > + > + if (!tz->trips) > + return -EINVAL; > + > + mutex_lock(&tz->lock); > + > + for (i = 0; i < tz->num_trips; i++) { > + if (tz->trips[i].type == THERMAL_TRIP_CRITICAL) { > + *temp = tz->trips[i].temperature; > + ret = 0; > + break; > + } > + } > + > + mutex_unlock(&tz->lock); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(thermal_zone_get_crit_temp); > + > +int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, > + struct thermal_trip *trip) > +{ > + int ret; > + > + if (!tz || trip_id < 0 || trip_id >= tz->num_trips || !trip) > + return -EINVAL; > + > + if (tz->trips) { > + *trip = tz->trips[trip_id]; > + return 0; > + } > + > + if (tz->ops->get_trip_hyst) { > + ret = tz->ops->get_trip_hyst(tz, trip_id, &trip->hysteresis); > + if (ret) > + return ret; > + } else { > + trip->hysteresis = 0; > + } > + > + ret = tz->ops->get_trip_temp(tz, trip_id, &trip->temperature); > + if (ret) > + return ret; > + > + return tz->ops->get_trip_type(tz, trip_id, &trip->type); > +} > + > +int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, > + struct thermal_trip *trip) > +{ > + int ret; > + > + mutex_lock(&tz->lock); > + ret = __thermal_zone_get_trip(tz, trip_id, trip); > + mutex_unlock(&tz->lock); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(thermal_zone_get_trip); > + > /** > * thermal_zone_device_register_with_trips() - register a new thermal zone device > * @type: the thermal zone device type > @@ -1174,8 +1243,6 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t > int polling_delay) > { > struct thermal_zone_device *tz; > - enum thermal_trip_type trip_type; > - int trip_temp; > int id; > int result; > int count; > @@ -1202,7 +1269,7 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t > return ERR_PTR(-EINVAL); > } > > - if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) > + if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp) && !trips) > return ERR_PTR(-EINVAL); > > tz = kzalloc(sizeof(*tz), GFP_KERNEL); > @@ -1252,9 +1319,10 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t > goto release_device; > > for (count = 0; count < num_trips; count++) { > - if (tz->ops->get_trip_type(tz, count, &trip_type) || > - tz->ops->get_trip_temp(tz, count, &trip_temp) || > - !trip_temp) > + struct thermal_trip trip; > + > + result = thermal_zone_get_trip(tz, count, &trip); > + if (result) > set_bit(count, &tz->trips_disabled); > } > > diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h > index 1571917bd3c8..879e91a48435 100644 > --- a/drivers/thermal/thermal_core.h > +++ b/drivers/thermal/thermal_core.h > @@ -113,6 +113,8 @@ int thermal_build_list_of_policies(char *buf); > /* Helpers */ > void thermal_zone_set_trips(struct thermal_zone_device *tz); > void __thermal_zone_set_trips(struct thermal_zone_device *tz); > +int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, > + struct thermal_trip *trip); > int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); > > /* sysfs I/F */ > diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c > index c65cdce8f856..06dded36e95e 100644 > --- a/drivers/thermal/thermal_helpers.c > +++ b/drivers/thermal/thermal_helpers.c > @@ -69,7 +69,7 @@ int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) > int ret = -EINVAL; > int count; > int crit_temp = INT_MAX; > - enum thermal_trip_type type; > + struct thermal_trip trip; > > lockdep_assert_held(&tz->lock); > > @@ -80,10 +80,9 @@ int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) > > if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) { > for (count = 0; count < tz->num_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); > + ret = __thermal_zone_get_trip(tz, count, &trip); > + if (!ret && trip.type == THERMAL_TRIP_CRITICAL) { > + crit_temp = trip.temperature; > break; > } > } > @@ -124,29 +123,30 @@ EXPORT_SYMBOL_GPL(thermal_zone_get_temp); > > void __thermal_zone_set_trips(struct thermal_zone_device *tz) > { > - int low = -INT_MAX; > - int high = INT_MAX; > - int trip_temp, hysteresis; > + struct thermal_trip trip; > + int low = -INT_MAX, high = INT_MAX; > int i, ret; > > lockdep_assert_held(&tz->lock); > > - if (!tz->ops->set_trips || !tz->ops->get_trip_hyst) > + if (!tz->ops->set_trips) > return; > > for (i = 0; i < tz->num_trips; i++) { > int trip_low; > > - tz->ops->get_trip_temp(tz, i, &trip_temp); > - tz->ops->get_trip_hyst(tz, i, &hysteresis); > + ret = __thermal_zone_get_trip(tz, i , &trip); > + if (ret) > + return; > > - trip_low = trip_temp - hysteresis; > + trip_low = trip.temperature - trip.hysteresis; > > if (trip_low < tz->temperature && trip_low > low) > low = trip_low; > > - if (trip_temp > tz->temperature && trip_temp < high) > - high = trip_temp; > + if (trip.temperature > tz->temperature && > + trip.temperature < high) > + high = trip.temperature; > } > > /* No need to change trip points */ > diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c > index 050d243a5fa1..2a3190d55358 100644 > --- a/drivers/thermal/thermal_netlink.c > +++ b/drivers/thermal/thermal_netlink.c > @@ -452,7 +452,8 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) > struct sk_buff *msg = p->msg; > struct thermal_zone_device *tz; > struct nlattr *start_trip; > - int i, id; > + struct thermal_trip trip; > + int ret, i, id; > > if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) > return -EINVAL; > @@ -471,18 +472,14 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) > > for (i = 0; i < tz->num_trips; i++) { > > - enum thermal_trip_type type; > - int temp, hyst = 0; > - > - tz->ops->get_trip_type(tz, i, &type); > - tz->ops->get_trip_temp(tz, i, &temp); > - if (tz->ops->get_trip_hyst) > - tz->ops->get_trip_hyst(tz, i, &hyst); > - > + ret = __thermal_zone_get_trip(tz, i, &trip); > + if (ret) > + goto out_cancel_nest; > + > if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, i) || > - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, type) || > - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, temp) || > - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, hyst)) > + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, trip.type) || > + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, trip.temperature) || > + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, trip.hysteresis)) > goto out_cancel_nest; > } > > diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c > index ec495c7dff03..d093d7aa64c6 100644 > --- a/drivers/thermal/thermal_sysfs.c > +++ b/drivers/thermal/thermal_sysfs.c > @@ -83,20 +83,17 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr, > char *buf) > { > struct thermal_zone_device *tz = to_thermal_zone(dev); > - enum thermal_trip_type type; > - int trip, result; > + struct thermal_trip trip; > + int trip_id, result; > > - if (!tz->ops->get_trip_type) > - return -EPERM; > - > - if (sscanf(attr->attr.name, "trip_point_%d_type", &trip) != 1) > + if (sscanf(attr->attr.name, "trip_point_%d_type", &trip_id) != 1) > return -EINVAL; > > - result = tz->ops->get_trip_type(tz, trip, &type); > + result = thermal_zone_get_trip(tz, trip_id, &trip); > if (result) > return result; > > - switch (type) { > + switch (trip.type) { > case THERMAL_TRIP_CRITICAL: > return sprintf(buf, "critical\n"); > case THERMAL_TRIP_HOT: > @@ -115,39 +112,33 @@ 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; > - int temperature, hyst = 0; > - enum thermal_trip_type type; > + struct thermal_trip trip; > + int trip_id, ret; > > if (!tz->ops->set_trip_temp && !tz->trips) > return -EPERM; > > - if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) > + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1) > return -EINVAL; > > - if (kstrtoint(buf, 10, &temperature)) > + if (kstrtoint(buf, 10, &trip.temperature)) > return -EINVAL; > > if (tz->ops->set_trip_temp) { > - ret = tz->ops->set_trip_temp(tz, trip, temperature); > + ret = tz->ops->set_trip_temp(tz, trip_id, trip.temperature); > if (ret) > return ret; > } > > if (tz->trips) > - tz->trips[trip].temperature = temperature; > + tz->trips[trip_id].temperature = trip.temperature; > > - if (tz->ops->get_trip_hyst) { > - ret = tz->ops->get_trip_hyst(tz, trip, &hyst); > - if (ret) > - return ret; > - } > - > - ret = tz->ops->get_trip_type(tz, trip, &type); > + ret = thermal_zone_get_trip(tz, trip_id, &trip); > if (ret) > return ret; > > - thermal_notify_tz_trip_change(tz->id, trip, type, temperature, hyst); > + thermal_notify_tz_trip_change(tz->id, trip_id, trip.type, > + trip.temperature, trip.hysteresis); > > thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); > > @@ -159,21 +150,17 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr, > char *buf) > { > struct thermal_zone_device *tz = to_thermal_zone(dev); > - int trip, ret; > - int temperature; > + struct thermal_trip trip; > + int trip_id, ret; > > - if (!tz->ops->get_trip_temp) > - return -EPERM; > - > - if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) > + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1) > return -EINVAL; > > - ret = tz->ops->get_trip_temp(tz, trip, &temperature); > - > + ret = thermal_zone_get_trip(tz, trip_id, &trip); > if (ret) > return ret; > > - return sprintf(buf, "%d\n", temperature); > + return sprintf(buf, "%d\n", trip.temperature); > } > > static ssize_t > @@ -211,18 +198,17 @@ 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; > - int temperature; > + struct thermal_trip trip; > + int trip_id, ret; > > - if (!tz->ops->get_trip_hyst) > - return -EPERM; > - > - if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) > + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip_id) != 1) > return -EINVAL; > > - ret = tz->ops->get_trip_hyst(tz, trip, &temperature); > + ret = thermal_zone_get_trip(tz, trip_id, &trip); > + if (ret) > + return ret; > > - return ret ? ret : sprintf(buf, "%d\n", temperature); > + return ret ? ret : sprintf(buf, "%d\n", trip.hysteresis); > } > > static ssize_t > diff --git a/include/linux/thermal.h b/include/linux/thermal.h > index a5a18351a898..feb8b61df746 100644 > --- a/include/linux/thermal.h > +++ b/include/linux/thermal.h > @@ -335,6 +335,13 @@ static inline void devm_thermal_of_zone_unregister(struct device *dev, > } > #endif > > +int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, > + struct thermal_trip *trip); > + > +int thermal_zone_get_num_trips(struct thermal_zone_device *tz); > + > +int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp); > + > #ifdef CONFIG_THERMAL > struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, > void *, struct thermal_zone_device_ops *, > -- > 2.34.1 >
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 4eab77d0e59c..16ef91dc102f 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -341,35 +341,31 @@ static void handle_critical_trips(struct thermal_zone_device *tz, tz->ops->critical(tz); } -static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) +static void handle_thermal_trip(struct thermal_zone_device *tz, int trip_id) { - enum thermal_trip_type type; - int trip_temp, hyst = 0; + struct thermal_trip trip; /* Ignore disabled trip points */ - if (test_bit(trip, &tz->trips_disabled)) + if (test_bit(trip_id, &tz->trips_disabled)) return; - tz->ops->get_trip_temp(tz, trip, &trip_temp); - tz->ops->get_trip_type(tz, trip, &type); - if (tz->ops->get_trip_hyst) - tz->ops->get_trip_hyst(tz, trip, &hyst); + __thermal_zone_get_trip(tz, trip_id, &trip); if (tz->last_temperature != THERMAL_TEMP_INVALID) { - if (tz->last_temperature < trip_temp && - tz->temperature >= trip_temp) - thermal_notify_tz_trip_up(tz->id, trip, + if (tz->last_temperature < trip.temperature && + tz->temperature >= trip.temperature) + thermal_notify_tz_trip_up(tz->id, trip_id, tz->temperature); - if (tz->last_temperature >= trip_temp && - tz->temperature < (trip_temp - hyst)) - thermal_notify_tz_trip_down(tz->id, trip, + if (tz->last_temperature >= trip.temperature && + tz->temperature < (trip.temperature - trip.hysteresis)) + thermal_notify_tz_trip_down(tz->id, trip_id, tz->temperature); } - if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) - handle_critical_trips(tz, trip, trip_temp, type); + if (trip.type == THERMAL_TRIP_CRITICAL || trip.type == THERMAL_TRIP_HOT) + handle_critical_trips(tz, trip_id, trip.temperature, trip.type); else - handle_non_critical_trips(tz, trip); + handle_non_critical_trips(tz, trip_id); } static void update_temperature(struct thermal_zone_device *tz) @@ -1142,6 +1138,79 @@ static void thermal_set_delay_jiffies(unsigned long *delay_jiffies, int delay_ms *delay_jiffies = round_jiffies(*delay_jiffies); } +int thermal_zone_get_num_trips(struct thermal_zone_device *tz) +{ + return tz->num_trips; +} +EXPORT_SYMBOL_GPL(thermal_zone_get_num_trips); + +int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp) +{ + int i, ret = -EINVAL; + + if (tz->ops->get_crit_temp) + return tz->ops->get_crit_temp(tz, temp); + + if (!tz->trips) + return -EINVAL; + + mutex_lock(&tz->lock); + + for (i = 0; i < tz->num_trips; i++) { + if (tz->trips[i].type == THERMAL_TRIP_CRITICAL) { + *temp = tz->trips[i].temperature; + ret = 0; + break; + } + } + + mutex_unlock(&tz->lock); + + return ret; +} +EXPORT_SYMBOL_GPL(thermal_zone_get_crit_temp); + +int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, + struct thermal_trip *trip) +{ + int ret; + + if (!tz || trip_id < 0 || trip_id >= tz->num_trips || !trip) + return -EINVAL; + + if (tz->trips) { + *trip = tz->trips[trip_id]; + return 0; + } + + if (tz->ops->get_trip_hyst) { + ret = tz->ops->get_trip_hyst(tz, trip_id, &trip->hysteresis); + if (ret) + return ret; + } else { + trip->hysteresis = 0; + } + + ret = tz->ops->get_trip_temp(tz, trip_id, &trip->temperature); + if (ret) + return ret; + + return tz->ops->get_trip_type(tz, trip_id, &trip->type); +} + +int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, + struct thermal_trip *trip) +{ + int ret; + + mutex_lock(&tz->lock); + ret = __thermal_zone_get_trip(tz, trip_id, trip); + mutex_unlock(&tz->lock); + + return ret; +} +EXPORT_SYMBOL_GPL(thermal_zone_get_trip); + /** * thermal_zone_device_register_with_trips() - register a new thermal zone device * @type: the thermal zone device type @@ -1174,8 +1243,6 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t int polling_delay) { struct thermal_zone_device *tz; - enum thermal_trip_type trip_type; - int trip_temp; int id; int result; int count; @@ -1202,7 +1269,7 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t return ERR_PTR(-EINVAL); } - if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) + if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp) && !trips) return ERR_PTR(-EINVAL); tz = kzalloc(sizeof(*tz), GFP_KERNEL); @@ -1252,9 +1319,10 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t goto release_device; for (count = 0; count < num_trips; count++) { - if (tz->ops->get_trip_type(tz, count, &trip_type) || - tz->ops->get_trip_temp(tz, count, &trip_temp) || - !trip_temp) + struct thermal_trip trip; + + result = thermal_zone_get_trip(tz, count, &trip); + if (result) set_bit(count, &tz->trips_disabled); } diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 1571917bd3c8..879e91a48435 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -113,6 +113,8 @@ int thermal_build_list_of_policies(char *buf); /* Helpers */ void thermal_zone_set_trips(struct thermal_zone_device *tz); void __thermal_zone_set_trips(struct thermal_zone_device *tz); +int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, + struct thermal_trip *trip); int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); /* sysfs I/F */ diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c index c65cdce8f856..06dded36e95e 100644 --- a/drivers/thermal/thermal_helpers.c +++ b/drivers/thermal/thermal_helpers.c @@ -69,7 +69,7 @@ int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) int ret = -EINVAL; int count; int crit_temp = INT_MAX; - enum thermal_trip_type type; + struct thermal_trip trip; lockdep_assert_held(&tz->lock); @@ -80,10 +80,9 @@ int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) { for (count = 0; count < tz->num_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); + ret = __thermal_zone_get_trip(tz, count, &trip); + if (!ret && trip.type == THERMAL_TRIP_CRITICAL) { + crit_temp = trip.temperature; break; } } @@ -124,29 +123,30 @@ EXPORT_SYMBOL_GPL(thermal_zone_get_temp); void __thermal_zone_set_trips(struct thermal_zone_device *tz) { - int low = -INT_MAX; - int high = INT_MAX; - int trip_temp, hysteresis; + struct thermal_trip trip; + int low = -INT_MAX, high = INT_MAX; int i, ret; lockdep_assert_held(&tz->lock); - if (!tz->ops->set_trips || !tz->ops->get_trip_hyst) + if (!tz->ops->set_trips) return; for (i = 0; i < tz->num_trips; i++) { int trip_low; - tz->ops->get_trip_temp(tz, i, &trip_temp); - tz->ops->get_trip_hyst(tz, i, &hysteresis); + ret = __thermal_zone_get_trip(tz, i , &trip); + if (ret) + return; - trip_low = trip_temp - hysteresis; + trip_low = trip.temperature - trip.hysteresis; if (trip_low < tz->temperature && trip_low > low) low = trip_low; - if (trip_temp > tz->temperature && trip_temp < high) - high = trip_temp; + if (trip.temperature > tz->temperature && + trip.temperature < high) + high = trip.temperature; } /* No need to change trip points */ diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c index 050d243a5fa1..2a3190d55358 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -452,7 +452,8 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) struct sk_buff *msg = p->msg; struct thermal_zone_device *tz; struct nlattr *start_trip; - int i, id; + struct thermal_trip trip; + int ret, i, id; if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) return -EINVAL; @@ -471,18 +472,14 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) for (i = 0; i < tz->num_trips; i++) { - enum thermal_trip_type type; - int temp, hyst = 0; - - tz->ops->get_trip_type(tz, i, &type); - tz->ops->get_trip_temp(tz, i, &temp); - if (tz->ops->get_trip_hyst) - tz->ops->get_trip_hyst(tz, i, &hyst); - + ret = __thermal_zone_get_trip(tz, i, &trip); + if (ret) + goto out_cancel_nest; + if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, i) || - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, type) || - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, temp) || - nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, hyst)) + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, trip.type) || + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, trip.temperature) || + nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, trip.hysteresis)) goto out_cancel_nest; } diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c index ec495c7dff03..d093d7aa64c6 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -83,20 +83,17 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr, char *buf) { struct thermal_zone_device *tz = to_thermal_zone(dev); - enum thermal_trip_type type; - int trip, result; + struct thermal_trip trip; + int trip_id, result; - if (!tz->ops->get_trip_type) - return -EPERM; - - if (sscanf(attr->attr.name, "trip_point_%d_type", &trip) != 1) + if (sscanf(attr->attr.name, "trip_point_%d_type", &trip_id) != 1) return -EINVAL; - result = tz->ops->get_trip_type(tz, trip, &type); + result = thermal_zone_get_trip(tz, trip_id, &trip); if (result) return result; - switch (type) { + switch (trip.type) { case THERMAL_TRIP_CRITICAL: return sprintf(buf, "critical\n"); case THERMAL_TRIP_HOT: @@ -115,39 +112,33 @@ 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; - int temperature, hyst = 0; - enum thermal_trip_type type; + struct thermal_trip trip; + int trip_id, ret; if (!tz->ops->set_trip_temp && !tz->trips) return -EPERM; - if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1) return -EINVAL; - if (kstrtoint(buf, 10, &temperature)) + if (kstrtoint(buf, 10, &trip.temperature)) return -EINVAL; if (tz->ops->set_trip_temp) { - ret = tz->ops->set_trip_temp(tz, trip, temperature); + ret = tz->ops->set_trip_temp(tz, trip_id, trip.temperature); if (ret) return ret; } if (tz->trips) - tz->trips[trip].temperature = temperature; + tz->trips[trip_id].temperature = trip.temperature; - if (tz->ops->get_trip_hyst) { - ret = tz->ops->get_trip_hyst(tz, trip, &hyst); - if (ret) - return ret; - } - - ret = tz->ops->get_trip_type(tz, trip, &type); + ret = thermal_zone_get_trip(tz, trip_id, &trip); if (ret) return ret; - thermal_notify_tz_trip_change(tz->id, trip, type, temperature, hyst); + thermal_notify_tz_trip_change(tz->id, trip_id, trip.type, + trip.temperature, trip.hysteresis); thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); @@ -159,21 +150,17 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr, char *buf) { struct thermal_zone_device *tz = to_thermal_zone(dev); - int trip, ret; - int temperature; + struct thermal_trip trip; + int trip_id, ret; - if (!tz->ops->get_trip_temp) - return -EPERM; - - if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1) return -EINVAL; - ret = tz->ops->get_trip_temp(tz, trip, &temperature); - + ret = thermal_zone_get_trip(tz, trip_id, &trip); if (ret) return ret; - return sprintf(buf, "%d\n", temperature); + return sprintf(buf, "%d\n", trip.temperature); } static ssize_t @@ -211,18 +198,17 @@ 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; - int temperature; + struct thermal_trip trip; + int trip_id, ret; - if (!tz->ops->get_trip_hyst) - return -EPERM; - - if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip_id) != 1) return -EINVAL; - ret = tz->ops->get_trip_hyst(tz, trip, &temperature); + ret = thermal_zone_get_trip(tz, trip_id, &trip); + if (ret) + return ret; - return ret ? ret : sprintf(buf, "%d\n", temperature); + return ret ? ret : sprintf(buf, "%d\n", trip.hysteresis); } static ssize_t diff --git a/include/linux/thermal.h b/include/linux/thermal.h index a5a18351a898..feb8b61df746 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -335,6 +335,13 @@ static inline void devm_thermal_of_zone_unregister(struct device *dev, } #endif +int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, + struct thermal_trip *trip); + +int thermal_zone_get_num_trips(struct thermal_zone_device *tz); + +int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp); + #ifdef CONFIG_THERMAL struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, void *, struct thermal_zone_device_ops *,