Lines Matching +full:cooling +full:- +full:device
1 // SPDX-License-Identifier: GPL-2.0
3 * devfreq_cooling: Thermal cooling device implementation for devices using
6 * Copyright (C) 2014-2015 ARM Limited
9 * - If OPPs are added or removed after devfreq cooling has
10 * registered, the devfreq cooling won't react to it.
30 * struct devfreq_cooling_device - Devfreq cooling device
33 * @cdev: Pointer to associated thermal cooling device.
34 * @devfreq: Pointer to associated devfreq device.
35 * @cooling_state: Current cooling state.
37 * cooling state. State is the index into the table, and
40 * order. You can index the table by cooling device state
50 * @capped_state: index to cooling state with in dynamic power budget
52 * of the devfreq device.
71 struct devfreq_cooling_device *dfc = cdev->devdata; in devfreq_cooling_get_max_state()
73 *state = dfc->freq_table_size - 1; in devfreq_cooling_get_max_state()
81 struct devfreq_cooling_device *dfc = cdev->devdata; in devfreq_cooling_get_cur_state()
83 *state = dfc->cooling_state; in devfreq_cooling_get_cur_state()
91 struct devfreq_cooling_device *dfc = cdev->devdata; in devfreq_cooling_set_cur_state()
92 struct devfreq *df = dfc->devfreq; in devfreq_cooling_set_cur_state()
93 struct device *dev = df->dev.parent; in devfreq_cooling_set_cur_state()
96 if (state == dfc->cooling_state) in devfreq_cooling_set_cur_state()
99 dev_dbg(dev, "Setting cooling state %lu\n", state); in devfreq_cooling_set_cur_state()
101 if (state >= dfc->freq_table_size) in devfreq_cooling_set_cur_state()
102 return -EINVAL; in devfreq_cooling_set_cur_state()
104 freq = dfc->freq_table[state]; in devfreq_cooling_set_cur_state()
106 dev_pm_qos_update_request(&dfc->req_max_freq, in devfreq_cooling_set_cur_state()
109 dfc->cooling_state = state; in devfreq_cooling_set_cur_state()
115 * freq_get_state() - get the cooling state corresponding to a frequency
116 * @dfc: Pointer to devfreq cooling device
119 * Return: the cooling state associated with the @freq, or
127 for (i = 0; i < dfc->freq_table_size; i++) { in freq_get_state()
128 if (dfc->freq_table[i] == freq) in freq_get_state()
137 struct device *dev = df->dev.parent; in get_voltage()
142 if (PTR_ERR(opp) == -ERANGE) in get_voltage()
164 * get_static_power() - calculate the static power
165 * @dfc: Pointer to devfreq cooling device
176 struct devfreq *df = dfc->devfreq; in get_static_power()
179 if (!dfc->power_ops->get_static_power) in get_static_power()
187 return dfc->power_ops->get_static_power(df, voltage); in get_static_power()
191 * get_dynamic_power - calculate the dynamic power
192 * @dfc: Pointer to devfreq cooling device
196 * Calculate the dynamic power in milliwatts consumed by the device at
208 struct devfreq_cooling_power *dfc_power = dfc->power_ops; in get_dynamic_power()
210 if (dfc_power->get_dynamic_power) in get_dynamic_power()
211 return dfc_power->get_dynamic_power(dfc->devfreq, freq, in get_dynamic_power()
215 power = (u64)dfc_power->dyn_power_coeff * freq_mhz * voltage * voltage; in get_dynamic_power()
234 struct devfreq_cooling_device *dfc = cdev->devdata; in devfreq_cooling_get_requested_power()
235 struct devfreq *df = dfc->devfreq; in devfreq_cooling_get_requested_power()
236 struct devfreq_dev_status *status = &df->last_status; in devfreq_cooling_get_requested_power()
238 unsigned long freq = status->current_frequency; in devfreq_cooling_get_requested_power()
246 res = -EAGAIN; in devfreq_cooling_get_requested_power()
250 if (dfc->power_ops->get_real_power) { in devfreq_cooling_get_requested_power()
253 res = -EINVAL; in devfreq_cooling_get_requested_power()
257 res = dfc->power_ops->get_real_power(df, power, freq, voltage); in devfreq_cooling_get_requested_power()
259 state = dfc->capped_state; in devfreq_cooling_get_requested_power()
260 dfc->res_util = dfc->power_table[state]; in devfreq_cooling_get_requested_power()
261 dfc->res_util *= SCALE_ERROR_MITIGATION; in devfreq_cooling_get_requested_power()
264 dfc->res_util /= *power; in devfreq_cooling_get_requested_power()
269 dyn_power = dfc->power_table[state]; in devfreq_cooling_get_requested_power()
272 dyn_power *= status->busy_time; in devfreq_cooling_get_requested_power()
273 dyn_power /= status->total_time; in devfreq_cooling_get_requested_power()
286 dfc->res_util = SCALE_ERROR_MITIGATION; in devfreq_cooling_get_requested_power()
294 struct devfreq_cooling_device *dfc = cdev->devdata; in devfreq_cooling_state2power()
298 if (state >= dfc->freq_table_size) in devfreq_cooling_state2power()
299 return -EINVAL; in devfreq_cooling_state2power()
301 freq = dfc->freq_table[state]; in devfreq_cooling_state2power()
304 *power = dfc->power_table[state] + static_power; in devfreq_cooling_state2power()
311 struct devfreq_cooling_device *dfc = cdev->devdata; in devfreq_cooling_power2state()
312 struct devfreq *df = dfc->devfreq; in devfreq_cooling_power2state()
313 struct devfreq_dev_status *status = &df->last_status; in devfreq_cooling_power2state()
314 unsigned long freq = status->current_frequency; in devfreq_cooling_power2state()
321 if (dfc->power_ops->get_real_power) { in devfreq_cooling_power2state()
323 est_power = power * dfc->res_util; in devfreq_cooling_power2state()
328 dyn_power = power - static_power; in devfreq_cooling_power2state()
332 busy_time = status->busy_time ?: 1; in devfreq_cooling_power2state()
333 est_power = (dyn_power * status->total_time) / busy_time; in devfreq_cooling_power2state()
337 * Find the first cooling state that is within the power in devfreq_cooling_power2state()
340 for (i = 0; i < dfc->freq_table_size - 1; i++) in devfreq_cooling_power2state()
341 if (est_power >= dfc->power_table[i]) in devfreq_cooling_power2state()
345 dfc->capped_state = i; in devfreq_cooling_power2state()
357 * devfreq_cooling_gen_tables() - Generate power and freq tables.
358 * @dfc: Pointer to devfreq cooling device.
361 * device's maximum power usage at each cooling state (OPP). The
367 * That way its indexed by cooling device state.
370 * freed when unregistering the devfreq cooling device.
376 struct devfreq *df = dfc->devfreq; in devfreq_cooling_gen_tables()
377 struct device *dev = df->dev.parent; in devfreq_cooling_gen_tables()
386 if (dfc->power_ops) { in devfreq_cooling_gen_tables()
390 return -ENOMEM; in devfreq_cooling_gen_tables()
396 ret = -ENOMEM; in devfreq_cooling_gen_tables()
400 for (i = 0, freq = ULONG_MAX; i < num_opps; i++, freq--) { in devfreq_cooling_gen_tables()
413 if (dfc->power_ops) { in devfreq_cooling_gen_tables()
414 if (dfc->power_ops->get_real_power) in devfreq_cooling_gen_tables()
428 if (dfc->power_ops) in devfreq_cooling_gen_tables()
429 dfc->power_table = power_table; in devfreq_cooling_gen_tables()
431 dfc->freq_table = freq_table; in devfreq_cooling_gen_tables()
432 dfc->freq_table_size = num_opps; in devfreq_cooling_gen_tables()
445 * of_devfreq_cooling_register_power() - Register devfreq cooling device,
448 * @df: Pointer to devfreq device.
451 * Register a devfreq cooling device. The available OPPs must be
452 * registered on the device.
454 * If @dfc_power is provided, the cooling device is registered with the
470 return ERR_PTR(-ENOMEM); in of_devfreq_cooling_register_power()
472 dfc->devfreq = df; in of_devfreq_cooling_register_power()
475 dfc->power_ops = dfc_power; in of_devfreq_cooling_register_power()
487 err = dev_pm_qos_add_request(df->dev.parent, &dfc->req_max_freq, in of_devfreq_cooling_register_power()
496 dfc->id = err; in of_devfreq_cooling_register_power()
498 snprintf(dev_name, sizeof(dev_name), "thermal-devfreq-%d", dfc->id); in of_devfreq_cooling_register_power()
504 dev_err(df->dev.parent, in of_devfreq_cooling_register_power()
505 "Failed to register devfreq cooling device (%d)\n", in of_devfreq_cooling_register_power()
510 dfc->cdev = cdev; in of_devfreq_cooling_register_power()
515 ida_simple_remove(&devfreq_ida, dfc->id); in of_devfreq_cooling_register_power()
518 dev_pm_qos_remove_request(&dfc->req_max_freq); in of_devfreq_cooling_register_power()
521 kfree(dfc->power_table); in of_devfreq_cooling_register_power()
522 kfree(dfc->freq_table); in of_devfreq_cooling_register_power()
531 * of_devfreq_cooling_register() - Register devfreq cooling device,
534 * @df: Pointer to devfreq device.
544 * devfreq_cooling_register() - Register devfreq cooling device.
545 * @df: Pointer to devfreq device.
554 * devfreq_cooling_unregister() - Unregister devfreq cooling device.
555 * @cdev: Pointer to devfreq cooling device to unregister.
564 dfc = cdev->devdata; in devfreq_cooling_unregister()
566 thermal_cooling_device_unregister(dfc->cdev); in devfreq_cooling_unregister()
567 ida_simple_remove(&devfreq_ida, dfc->id); in devfreq_cooling_unregister()
568 dev_pm_qos_remove_request(&dfc->req_max_freq); in devfreq_cooling_unregister()
569 kfree(dfc->power_table); in devfreq_cooling_unregister()
570 kfree(dfc->freq_table); in devfreq_cooling_unregister()