Lines Matching +full:saturation +full:- +full:ratio
1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/devfreq-event.h>
38 unsigned int ratio; member
42 * Control the devfreq-event device to get the current state of bus
49 for (i = 0; i < bus->edev_count; i++) { \
50 if (!bus->edev[i]) \
52 ret = devfreq_event_##ops(bus->edev[i]); \
70 for (i = 0; i < bus->edev_count; i++) { in exynos_bus_get_event()
71 if (!bus->edev[i]) in exynos_bus_get_event()
74 ret = devfreq_event_get_event(bus->edev[i], &event_data); in exynos_bus_get_event()
84 edata->load_count = load_count; in exynos_bus_get_event()
85 edata->total_count = total_count; in exynos_bus_get_event()
91 * devfreq function for both simple-ondemand and passive governor
109 mutex_lock(&bus->lock); in exynos_bus_target()
112 bus->curr_freq = *freq; in exynos_bus_target()
114 mutex_unlock(&bus->lock); in exynos_bus_target()
126 stat->current_frequency = bus->curr_freq; in exynos_bus_get_dev_status()
130 dev_err(dev, "failed to get event from devfreq-event devices\n"); in exynos_bus_get_dev_status()
131 stat->total_time = stat->busy_time = 0; in exynos_bus_get_dev_status()
135 stat->busy_time = (edata.load_count * 100) / bus->ratio; in exynos_bus_get_dev_status()
136 stat->total_time = edata.total_count; in exynos_bus_get_dev_status()
138 dev_dbg(dev, "Usage of devfreq-event : %lu/%lu\n", stat->busy_time, in exynos_bus_get_dev_status()
139 stat->total_time); in exynos_bus_get_dev_status()
144 dev_err(dev, "failed to set event to devfreq-event devices\n"); in exynos_bus_get_dev_status()
158 dev_warn(dev, "failed to disable the devfreq-event devices\n"); in exynos_bus_exit()
160 platform_device_unregister(bus->icc_pdev); in exynos_bus_exit()
163 clk_disable_unprepare(bus->clk); in exynos_bus_exit()
164 dev_pm_opp_put_regulators(bus->opp_token); in exynos_bus_exit()
171 platform_device_unregister(bus->icc_pdev); in exynos_bus_passive_exit()
174 clk_disable_unprepare(bus->clk); in exynos_bus_passive_exit()
180 struct device *dev = bus->dev; in exynos_bus_parent_parse_of()
190 bus->opp_token = ret; in exynos_bus_parent_parse_of()
193 * Get the devfreq-event devices to get the current utilization of in exynos_bus_parent_parse_of()
196 count = devfreq_event_get_edev_count(dev, "devfreq-events"); in exynos_bus_parent_parse_of()
198 dev_err(dev, "failed to get the count of devfreq-event dev\n"); in exynos_bus_parent_parse_of()
202 bus->edev_count = count; in exynos_bus_parent_parse_of()
204 size = sizeof(*bus->edev) * count; in exynos_bus_parent_parse_of()
205 bus->edev = devm_kzalloc(dev, size, GFP_KERNEL); in exynos_bus_parent_parse_of()
206 if (!bus->edev) { in exynos_bus_parent_parse_of()
207 ret = -ENOMEM; in exynos_bus_parent_parse_of()
212 bus->edev[i] = devfreq_event_get_edev_by_phandle(dev, in exynos_bus_parent_parse_of()
213 "devfreq-events", i); in exynos_bus_parent_parse_of()
214 if (IS_ERR(bus->edev[i])) { in exynos_bus_parent_parse_of()
215 ret = -EPROBE_DEFER; in exynos_bus_parent_parse_of()
221 * Optionally, Get the saturation ratio according to Exynos SoC in exynos_bus_parent_parse_of()
222 * When measuring the utilization of each AXI bus with devfreq-event in exynos_bus_parent_parse_of()
225 * simple-ondemand governor might not decide to change the current in exynos_bus_parent_parse_of()
230 if (of_property_read_u32(np, "exynos,saturation-ratio", &bus->ratio)) in exynos_bus_parent_parse_of()
231 bus->ratio = DEFAULT_SATURATION_RATIO; in exynos_bus_parent_parse_of()
236 dev_pm_opp_put_regulators(bus->opp_token); in exynos_bus_parent_parse_of()
244 struct device *dev = bus->dev; in exynos_bus_parse_of()
250 bus->clk = devm_clk_get(dev, "bus"); in exynos_bus_parse_of()
251 if (IS_ERR(bus->clk)) { in exynos_bus_parse_of()
253 return PTR_ERR(bus->clk); in exynos_bus_parse_of()
256 ret = clk_prepare_enable(bus->clk); in exynos_bus_parse_of()
269 rate = clk_get_rate(bus->clk); in exynos_bus_parse_of()
277 bus->curr_freq = dev_pm_opp_get_freq(opp); in exynos_bus_parse_of()
285 clk_disable_unprepare(bus->clk); in exynos_bus_parse_of()
293 struct device *dev = bus->dev; in exynos_bus_profile_init()
298 profile->polling_ms = 50; in exynos_bus_profile_init()
299 profile->target = exynos_bus_target; in exynos_bus_profile_init()
300 profile->get_dev_status = exynos_bus_get_dev_status; in exynos_bus_profile_init()
301 profile->exit = exynos_bus_exit; in exynos_bus_profile_init()
305 return -ENOMEM; in exynos_bus_profile_init()
307 ondemand_data->upthreshold = 40; in exynos_bus_profile_init()
308 ondemand_data->downdifferential = 5; in exynos_bus_profile_init()
311 bus->devfreq = devm_devfreq_add_device(dev, profile, in exynos_bus_profile_init()
314 if (IS_ERR(bus->devfreq)) { in exynos_bus_profile_init()
316 return PTR_ERR(bus->devfreq); in exynos_bus_profile_init()
320 ret = devm_devfreq_register_opp_notifier(dev, bus->devfreq); in exynos_bus_profile_init()
327 * Enable devfreq-event to get raw data which is used to determine in exynos_bus_profile_init()
332 dev_err(dev, "failed to enable devfreq-event devices\n"); in exynos_bus_profile_init()
338 dev_err(dev, "failed to set event to devfreq-event devices\n"); in exynos_bus_profile_init()
346 dev_warn(dev, "failed to disable the devfreq-event devices\n"); in exynos_bus_profile_init()
354 struct device *dev = bus->dev; in exynos_bus_profile_init_passive()
359 profile->target = exynos_bus_target; in exynos_bus_profile_init_passive()
360 profile->exit = exynos_bus_passive_exit; in exynos_bus_profile_init_passive()
365 return -EPROBE_DEFER; in exynos_bus_profile_init_passive()
369 return -ENOMEM; in exynos_bus_profile_init_passive()
371 passive_data->parent = parent_devfreq; in exynos_bus_profile_init_passive()
374 bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE, in exynos_bus_profile_init_passive()
376 if (IS_ERR(bus->devfreq)) { in exynos_bus_profile_init_passive()
379 return PTR_ERR(bus->devfreq); in exynos_bus_profile_init_passive()
387 struct device *dev = &pdev->dev; in exynos_bus_probe()
388 struct device_node *np = dev->of_node, *node; in exynos_bus_probe()
397 return -EINVAL; in exynos_bus_probe()
400 bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL); in exynos_bus_probe()
402 return -ENOMEM; in exynos_bus_probe()
403 mutex_init(&bus->lock); in exynos_bus_probe()
404 bus->dev = &pdev->dev; in exynos_bus_probe()
409 return -ENOMEM; in exynos_bus_probe()
411 node = of_parse_phandle(dev->of_node, "devfreq", 0); in exynos_bus_probe()
421 /* Parse the device-tree to get the resource information */ in exynos_bus_probe()
435 if (of_property_present(dev->of_node, "#interconnect-cells")) { in exynos_bus_probe()
436 bus->icc_pdev = platform_device_register_data( in exynos_bus_probe()
437 dev, "exynos-generic-icc", in exynos_bus_probe()
440 if (IS_ERR(bus->icc_pdev)) { in exynos_bus_probe()
441 ret = PTR_ERR(bus->icc_pdev); in exynos_bus_probe()
446 max_state = bus->devfreq->max_state; in exynos_bus_probe()
447 min_freq = (bus->devfreq->freq_table[0] / 1000); in exynos_bus_probe()
448 max_freq = (bus->devfreq->freq_table[max_state - 1] / 1000); in exynos_bus_probe()
449 pr_info("exynos-bus: new bus device registered: %s (%6ld KHz ~ %6ld KHz)\n", in exynos_bus_probe()
456 clk_disable_unprepare(bus->clk); in exynos_bus_probe()
458 dev_pm_opp_put_regulators(bus->opp_token); in exynos_bus_probe()
465 struct exynos_bus *bus = dev_get_drvdata(&pdev->dev); in exynos_bus_shutdown()
467 devfreq_suspend_device(bus->devfreq); in exynos_bus_shutdown()
478 dev_err(dev, "failed to enable the devfreq-event devices\n"); in exynos_bus_resume()
492 dev_err(dev, "failed to disable the devfreq-event devices\n"); in exynos_bus_suspend()
505 { .compatible = "samsung,exynos-bus", },
514 .name = "exynos-bus",