1 // SPDX-License-Identifier: GPL-2.0-only
29  * "Each brightness level is represented by a number between 0 and 100,
31  * power consumption or 50% brightness, as defined by the OEM."
35  * the percentage of brightness only
37 #define ACPI_TO_RAW(v, d) (d->raw_bd->props.max_brightness * v / 100)
38 #define RAW_TO_ACPI(v, d) (v * 100 / d->raw_bd->props.max_brightness)
44 	struct int3406_thermal_data *d = cooling_dev->devdata;  in int3406_thermal_get_max_state()
46 	*state = d->upper_limit - d->lower_limit;  in int3406_thermal_get_max_state()
54 	struct int3406_thermal_data *d = cooling_dev->devdata;  in int3406_thermal_set_cur_state()
57 	if (state > d->upper_limit - d->lower_limit)  in int3406_thermal_set_cur_state()
58 		return -EINVAL;  in int3406_thermal_set_cur_state()
60 	acpi_level = d->br->levels[d->upper_limit - state];  in int3406_thermal_set_cur_state()
64 	return backlight_device_set_brightness(d->raw_bd, raw_level);  in int3406_thermal_set_cur_state()
71 	struct int3406_thermal_data *d = cooling_dev->devdata;  in int3406_thermal_get_cur_state()
75 	acpi_level = RAW_TO_ACPI(d->raw_bd->props.brightness, d);  in int3406_thermal_get_cur_state()
82 	for (index = d->lower_limit; index < d->upper_limit; index++) {  in int3406_thermal_get_cur_state()
83 		if (acpi_level <= d->br->levels[index])  in int3406_thermal_get_cur_state()
87 	*state = d->upper_limit - index;  in int3406_thermal_get_cur_state()
105 	return i == nr ? -ENOENT : i;  in int3406_thermal_get_index()
113 	status = acpi_evaluate_integer(d->handle, "DDDL", NULL, &lower_limit);  in int3406_thermal_get_limit()
115 		d->lower_limit = int3406_thermal_get_index(d->br->levels,  in int3406_thermal_get_limit()
116 					d->br->count, lower_limit);  in int3406_thermal_get_limit()
118 	status = acpi_evaluate_integer(d->handle, "DDPC", NULL, &upper_limit);  in int3406_thermal_get_limit()
120 		d->upper_limit = int3406_thermal_get_index(d->br->levels,  in int3406_thermal_get_limit()
121 					d->br->count, upper_limit);  in int3406_thermal_get_limit()
124 	d->lower_limit = d->lower_limit > 0 ? d->lower_limit : 2;  in int3406_thermal_get_limit()
125 	d->upper_limit = d->upper_limit > 0 ? d->upper_limit : d->br->count - 1;  in int3406_thermal_get_limit()
136 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);  in int3406_thermal_probe()
141 	if (!ACPI_HANDLE(&pdev->dev))  in int3406_thermal_probe()
142 		return -ENODEV;  in int3406_thermal_probe()
144 	d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL);  in int3406_thermal_probe()
146 		return -ENOMEM;  in int3406_thermal_probe()
147 	d->handle = ACPI_HANDLE(&pdev->dev);  in int3406_thermal_probe()
151 		return -ENODEV;  in int3406_thermal_probe()
152 	d->raw_bd = bd;  in int3406_thermal_probe()
154 	ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br, NULL);  in int3406_thermal_probe()
160 	d->cooling_dev = thermal_cooling_device_register(acpi_device_bid(adev),  in int3406_thermal_probe()
162 	if (IS_ERR(d->cooling_dev))  in int3406_thermal_probe()
165 	ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,  in int3406_thermal_probe()
175 	thermal_cooling_device_unregister(d->cooling_dev);  in int3406_thermal_probe()
177 	kfree(d->br);  in int3406_thermal_probe()
178 	return -ENODEV;  in int3406_thermal_probe()
185 	thermal_cooling_device_unregister(d->cooling_dev);  in int3406_thermal_remove()
186 	kfree(d->br);  in int3406_thermal_remove()