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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-12 21:58:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-12 21:58:45 +0300
commit6a776e47a045462a1df1a3a9592598259ffd614f (patch)
tree79c3ea4b96e48c7c4389114e738dcc0a972c97c0 /include
parenta34ab101a9d27a2995142b47f9857fb46fcb072a (diff)
parentcb15c81a0c1c1f7829b9809a209ecacc77f5aa63 (diff)
downloadlinux-6a776e47a045462a1df1a3a9592598259ffd614f.tar.xz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui: - Fix a problem where orderly_shutdown() is called for multiple times due to multiple critical overheating events raised in a short period by platform thermal driver. (Keerthy) - Introduce a backup thermal shutdown mechanism, which invokes kernel_power_off()/emergency_restart() directly, after orderly_shutdown() being issued for certain amount of time(specified via Kconfig). This is useful in certain conditions that userspace may be unable to power off the system in a clean manner and leaves the system in a critical state, like in the middle of driver probing phase. (Keerthy) - Introduce a new interface in thermal devfreq_cooling code so that the driver can provide more precise data regarding actual power to the thermal governor every time the power budget is calculated. (Lukasz Luba) - Introduce BCM 2835 soc thermal driver and northstar thermal driver, within a new sub-folder. (Rafał Miłecki) - Introduce DA9062/61 thermal driver. (Steve Twiss) - Remove non-DT booting on TI-SoC driver. Also add support to fetching coefficients from DT. (Keerthy) - Refactorf RCAR Gen3 thermal driver. (Niklas Söderlund) - Small fix on MTK and intel-soc-dts thermal driver. (Dawei Chien, Brian Bian) * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (25 commits) thermal: core: Add a back up thermal shutdown mechanism thermal: core: Allow orderly_poweroff to be called only once Thermal: Intel SoC DTS: Change interrupt request behavior trace: thermal: add another parameter 'power' to the tracing function thermal: devfreq_cooling: add new interface for direct power read thermal: devfreq_cooling: refactor code and add get_voltage function thermal: mt8173: minor mtk_thermal.c cleanups thermal: bcm2835: move to the broadcom subdirectory thermal: broadcom: ns: specify myself as MODULE_AUTHOR thermal: da9062/61: Thermal junction temperature monitoring driver Documentation: devicetree: thermal: da9062/61 TJUNC temperature binding thermal: broadcom: add Northstar thermal driver dt-bindings: thermal: add support for Broadcom's Northstar thermal thermal: bcm2835: add thermal driver for bcm2835 SoC dt-bindings: Add thermal zone to bcm2835-thermal example thermal: rcar_gen3_thermal: add suspend and resume support thermal: rcar_gen3_thermal: store device match data in private structure thermal: rcar_gen3_thermal: enable hardware interrupts for trip points thermal: rcar_gen3_thermal: record and check number of TSCs found thermal: rcar_gen3_thermal: check that TSC exists before memory allocation ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/devfreq_cooling.h19
-rw-r--r--include/trace/events/thermal.h11
2 files changed, 26 insertions, 4 deletions
diff --git a/include/linux/devfreq_cooling.h b/include/linux/devfreq_cooling.h
index c35d0c0e0ada..4635f95000a4 100644
--- a/include/linux/devfreq_cooling.h
+++ b/include/linux/devfreq_cooling.h
@@ -34,6 +34,23 @@
* If get_dynamic_power() is NULL, then the
* dynamic power is calculated as
* @dyn_power_coeff * frequency * voltage^2
+ * @get_real_power: When this is set, the framework uses it to ask the
+ * device driver for the actual power.
+ * Some devices have more sophisticated methods
+ * (like power counters) to approximate the actual power
+ * that they use.
+ * This function provides more accurate data to the
+ * thermal governor. When the driver does not provide
+ * such function, framework just uses pre-calculated
+ * table and scale the power by 'utilization'
+ * (based on 'busy_time' and 'total_time' taken from
+ * devfreq 'last_status').
+ * The value returned by this function must be lower
+ * or equal than the maximum power value
+ * for the current state
+ * (which can be found in power_table[state]).
+ * When this interface is used, the power_table holds
+ * max total (static + dynamic) power value for each OPP.
*/
struct devfreq_cooling_power {
unsigned long (*get_static_power)(struct devfreq *devfreq,
@@ -41,6 +58,8 @@ struct devfreq_cooling_power {
unsigned long (*get_dynamic_power)(struct devfreq *devfreq,
unsigned long freq,
unsigned long voltage);
+ int (*get_real_power)(struct devfreq *df, u32 *power,
+ unsigned long freq, unsigned long voltage);
unsigned long dyn_power_coeff;
};
diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h
index 2b4a8ff72d0d..6cde5b3514c2 100644
--- a/include/trace/events/thermal.h
+++ b/include/trace/events/thermal.h
@@ -151,9 +151,9 @@ TRACE_EVENT(thermal_power_cpu_limit,
TRACE_EVENT(thermal_power_devfreq_get_power,
TP_PROTO(struct thermal_cooling_device *cdev,
struct devfreq_dev_status *status, unsigned long freq,
- u32 dynamic_power, u32 static_power),
+ u32 dynamic_power, u32 static_power, u32 power),
- TP_ARGS(cdev, status, freq, dynamic_power, static_power),
+ TP_ARGS(cdev, status, freq, dynamic_power, static_power, power),
TP_STRUCT__entry(
__string(type, cdev->type )
@@ -161,6 +161,7 @@ TRACE_EVENT(thermal_power_devfreq_get_power,
__field(u32, load )
__field(u32, dynamic_power )
__field(u32, static_power )
+ __field(u32, power)
),
TP_fast_assign(
@@ -169,11 +170,13 @@ TRACE_EVENT(thermal_power_devfreq_get_power,
__entry->load = (100 * status->busy_time) / status->total_time;
__entry->dynamic_power = dynamic_power;
__entry->static_power = static_power;
+ __entry->power = power;
),
- TP_printk("type=%s freq=%lu load=%u dynamic_power=%u static_power=%u",
+ TP_printk("type=%s freq=%lu load=%u dynamic_power=%u static_power=%u power=%u",
__get_str(type), __entry->freq,
- __entry->load, __entry->dynamic_power, __entry->static_power)
+ __entry->load, __entry->dynamic_power, __entry->static_power,
+ __entry->power)
);
TRACE_EVENT(thermal_power_devfreq_limit,