Lines Matching +full:- +full:temperature

6 -----------
10 1.  "switch on" trip point: temperature above which the governor
14 2.  "desired temperature" trip point: it should be higher than the
15     "switch on" trip point.  This the target temperature the governor
20 --------------
23 Proportional-Integral-Derivative controller (PID controller) with
24 temperature as the control input and power as the controlled output:
29    -  e = desired_temperature - current_temperature
30    -  err_integral is the sum of previous errors
31    -  diff_err = e - previous_error
39        |              +----------+   +---+
40        |       +----->| diff_err |-->| X |------+
41        |       |      +----------+   +---+      |
47      +---+     |      +-------+      +---+    +---+   +---+   +----------+
48      | S |-----+----->| sum e |----->| X |--->| S |-->| S |-->|power     |
49      +---+     |      +-------+      +---+    +---+   +---+   |allocation|
50        ^       |                                ^             +----------+
52        |       |        +---+                   |                |     |
53        |       +------->| X |-------------------+                v     v
54        |                +---+                               granted performance
61 -----------------
66 temperature.  This is the maximum sustained power for allocation at
67 the desired maximum temperature.  The actual sustained power can vary
70 to the speed-grade of the silicon.  `sustainable_power` is therefore
79 thermal-zone.  For example::
81 	thermal-zones {
83 			polling-delay = <1000>;
84 			polling-delay-passive = <100>;
85 			sustainable-power = <2500>;
101 -------------
106 constant during temperature overshoot periods (current temperature is
107 above "desired temperature" trip point).  Conversely, `k_pu` is the
108 proportional term constant during temperature undershoot periods
109 (current temperature below "desired temperature" trip point).
114 available capacity at a low temperature.  On the other hand, a high
116 while temperature is low, and may lead to temperature overshooting.
120     2 * sustainable_power / (desired_temperature - switch_on_temp)
126     sustainable_power / (desired_temperature - switch_on_temp)
134 desired temperature and the current one.  When the current temperature
138 an estimate, which is the reason for closed-loop control such as this.
142     P_max = 2 * sustainable_power * (T_set - T) / (T_set - T_on) +
147     - T_set is the desired temperature
148     - T is the current temperature
149     - T_on is the switch on temperature
151 When the current temperature is the switch_on temperature, the above
154     P_max = 2 * sustainable_power * (T_set - T_on) / (T_set - T_on) +
159 3 * `sustainable_power` to `sustainable_power` as the temperature
160 rises from the switch on temperature to the desired temperature.
163 -----------------------
168 the exact power that the governor requests.  When the temperature
175 ---
201 success, -E* on failure.  This is currently used by the power
221 milliwatts and store it in @power.  It should return 0 on success, -E*
239 -E* on failure.  This is currently used by the thermal core to convert
246 ----------------------
261 as the `contribution` property of each map in the `cooling-maps` node.
271 governor, step-wise will also misbehave if you call its throttle()
280 thermal zone should have power values reported either in milli-Watts