On Mon, Jun 06, 2016 at 07:44:45PM +0800, Caesar Wang wrote: > From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > > This adds support for hardware-tracked trip points to the device tree > thermal sensor framework. > > The framework supports an arbitrary number of trip points. Whenever > the current temperature is updated, the trip points immediately > below and above the current temperature are found. A .set_trips > callback is then called with the temperatures. If there is no trip > point above or below the current temperature, the passed trip > temperature will be -INT_MAX or INT_MAX respectively. In this callback, > the driver should program the hardware such that it is notified > when either of these trip points are triggered. When a trip point > is triggered, the driver should call `thermal_zone_device_update' > for the respective thermal zone. This will cause the trip points > to be updated again. > > If .set_trips is not implemented, the framework behaves as before. > > This patch is based on an earlier version from Mikko Perttunen > <mikko.perttunen@xxxxxxxx> > > Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > Signed-off-by: Caesar Wang <wxt@xxxxxxxxxxxxxx> > Cc: Zhang Rui <rui.zhang@xxxxxxxxx> > Cc: Eduardo Valentin <edubezval@xxxxxxxxx> > Cc: linux-pm@xxxxxxxxxxxxxxx > > --- > > Changes in v5: > - add the lock for thermal_zone_set_trips function. Looks good to me! Reviewed-by: Javi Merino <javi.merino@xxxxxxx> > - change based on next kernel. > > Changes in v4: > - Missing the lock added in v3. > > Changes in v3: > - as Javi comments on https://patchwork.kernel.org/patch/9001281/. > - add the lock for preventing the called from multi placce > - add the note for pre_low/high_trip. > > Changes in v2: > - update the sysfs-api.txt for set_trips. > > Documentation/thermal/sysfs-api.txt | 7 +++++ > drivers/thermal/thermal_core.c | 54 +++++++++++++++++++++++++++++++++++++ > drivers/thermal/thermal_sysfs.c | 3 +++ > include/linux/thermal.h | 10 +++++++ > 4 files changed, 74 insertions(+) > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
