Hi Amit, > -----Original Message----- > From: amit kachhap [mailto:amitdanielk@xxxxxxxxx] On Behalf Of Amit Daniel > Kachhap > Sent: Wednesday, February 22, 2012 3:44 PM > To: linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx; mjg59@xxxxxxxxxxxxx; linux- > acpi@xxxxxxxxxxxxxxx; lenb@xxxxxxxxxx; linaro-dev@xxxxxxxxxxxxxxxx; > amit.kachhap@xxxxxxxxxx; R, Durgadoss; rob.lee@xxxxxxxxxx; patches@xxxxxxxxxx > Subject: [PATCH 1/4] thermal: Add a new trip type to use cooling device > instance number > > This patch adds a new trip type THERMAL_TRIP_STATE_ACTIVE. This > trip behaves same as THERMAL_TRIP_ACTIVE but also passes the cooling > device instance number. This helps the cooling device registered as > different instances to perform appropriate cooling action decision in > the set_cur_state call back function. > > Also since the trip temperature's are in ascending order so some logic > is put in place to skip the un-necessary checks. > > Signed-off-by: Amit Daniel Kachhap <amit.kachhap@xxxxxxxxxx> > --- > Documentation/thermal/sysfs-api.txt | 4 +- > drivers/thermal/thermal_sys.c | 45 ++++++++++++++++++++++++++++++++-- > include/linux/thermal.h | 1 + > 3 files changed, 45 insertions(+), 5 deletions(-) > > diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs- > api.txt > index 1733ab9..7a0c080 100644 > --- a/Documentation/thermal/sysfs-api.txt > +++ b/Documentation/thermal/sysfs-api.txt > @@ -184,8 +184,8 @@ trip_point_[0-*]_temp > > trip_point_[0-*]_type > Strings which indicate the type of the trip point. > - E.g. it can be one of critical, hot, passive, active[0-*] for ACPI > - thermal zone. > + E.g. it can be one of critical, hot, passive, active[0-1], > + state-active[0-*] for ACPI thermal zone. > RO, Optional > > cdev[0-*] > diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c > index 220ce7e..d4c9b20 100644 > --- a/drivers/thermal/thermal_sys.c > +++ b/drivers/thermal/thermal_sys.c > @@ -192,6 +192,8 @@ trip_point_type_show(struct device *dev, struct > device_attribute *attr, > return sprintf(buf, "passive\n"); > case THERMAL_TRIP_ACTIVE: > return sprintf(buf, "active\n"); > + case THERMAL_TRIP_STATE_ACTIVE: > + return sprintf(buf, "state-active\n"); > default: > return sprintf(buf, "unknown\n"); > } > @@ -1034,10 +1036,10 @@ EXPORT_SYMBOL(thermal_cooling_device_unregister); > > void thermal_zone_device_update(struct thermal_zone_device *tz) > { > - int count, ret = 0; > - long temp, trip_temp; > + int count, ret = 0, inst_id; > + long temp, trip_temp, max_state, last_trip_change = 0; > enum thermal_trip_type trip_type; > - struct thermal_cooling_device_instance *instance; > + struct thermal_cooling_device_instance *instance, *state_instance; > struct thermal_cooling_device *cdev; > > mutex_lock(&tz->lock); > @@ -1086,6 +1088,43 @@ void thermal_zone_device_update(struct > thermal_zone_device *tz) > cdev->ops->set_cur_state(cdev, 0); > } > break; > + case THERMAL_TRIP_STATE_ACTIVE: > + list_for_each_entry(instance, &tz->cooling_devices, > + node) { > + if (instance->trip != count) > + continue; > + > + if (temp <= last_trip_change) > + continue; > + > + inst_id = 0; > + /* > + *For this instance how many instance of same > + *cooling device occured before > + */ > + > + list_for_each_entry(state_instance, > + &tz->cooling_devices, node) { > + if (instance->cdev == > + state_instance->cdev) > + inst_id++; > + if (state_instance->trip == count) > + break; > + } Can you explain a bit more on this loop and the set_cur_state below ? Sorry, I don't get the logic behind this.. Thanks, Durga > + > + cdev = instance->cdev; > + cdev->ops->get_max_state(cdev, &max_state); > + > + if ((temp >= trip_temp) && > + (inst_id <= max_state)) > + cdev->ops->set_cur_state(cdev, inst_id); > + else if ((temp < trip_temp) && > + (--inst_id <= max_state)) > + cdev->ops->set_cur_state(cdev, inst_id); > + > + last_trip_change = trip_temp; > + } > + break; > case THERMAL_TRIP_PASSIVE: > if (temp >= trip_temp || tz->passive) > thermal_zone_device_passive(tz, temp, > diff --git a/include/linux/thermal.h b/include/linux/thermal.h > index 796f1ff..8df901f 100644 > --- a/include/linux/thermal.h > +++ b/include/linux/thermal.h > @@ -42,6 +42,7 @@ enum thermal_trip_type { > THERMAL_TRIP_PASSIVE, > THERMAL_TRIP_HOT, > THERMAL_TRIP_CRITICAL, > + THERMAL_TRIP_STATE_ACTIVE, > }; > > struct thermal_zone_device_ops { > -- > 1.7.1 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
