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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * fan_attr.c - Create extra attributes for ACPI Fan driver
- *
- * Copyright (C) 2001, 2002 Andy Grover <[email protected]>
- * Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]>
- * Copyright (C) 2022 Intel Corporation. All rights reserved.
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/acpi.h>
- #include "fan.h"
- MODULE_LICENSE("GPL");
- static ssize_t show_state(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct acpi_fan_fps *fps = container_of(attr, struct acpi_fan_fps, dev_attr);
- int count;
- if (fps->control == 0xFFFFFFFF || fps->control > 100)
- count = scnprintf(buf, PAGE_SIZE, "not-defined:");
- else
- count = scnprintf(buf, PAGE_SIZE, "%lld:", fps->control);
- if (fps->trip_point == 0xFFFFFFFF || fps->trip_point > 9)
- count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
- else
- count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->trip_point);
- if (fps->speed == 0xFFFFFFFF)
- count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
- else
- count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->speed);
- if (fps->noise_level == 0xFFFFFFFF)
- count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
- else
- count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->noise_level * 100);
- if (fps->power == 0xFFFFFFFF)
- count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined\n");
- else
- count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld\n", fps->power);
- return count;
- }
- static ssize_t show_fan_speed(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct acpi_device *acpi_dev = container_of(dev, struct acpi_device, dev);
- struct acpi_fan_fst fst;
- int status;
- status = acpi_fan_get_fst(acpi_dev, &fst);
- if (status)
- return status;
- return sprintf(buf, "%lld\n", fst.speed);
- }
- static ssize_t show_fine_grain_control(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct acpi_device *acpi_dev = container_of(dev, struct acpi_device, dev);
- struct acpi_fan *fan = acpi_driver_data(acpi_dev);
- return sprintf(buf, "%d\n", fan->fif.fine_grain_ctrl);
- }
- int acpi_fan_create_attributes(struct acpi_device *device)
- {
- struct acpi_fan *fan = acpi_driver_data(device);
- int i, status;
- sysfs_attr_init(&fan->fine_grain_control.attr);
- fan->fine_grain_control.show = show_fine_grain_control;
- fan->fine_grain_control.store = NULL;
- fan->fine_grain_control.attr.name = "fine_grain_control";
- fan->fine_grain_control.attr.mode = 0444;
- status = sysfs_create_file(&device->dev.kobj, &fan->fine_grain_control.attr);
- if (status)
- return status;
- /* _FST is present if we are here */
- sysfs_attr_init(&fan->fst_speed.attr);
- fan->fst_speed.show = show_fan_speed;
- fan->fst_speed.store = NULL;
- fan->fst_speed.attr.name = "fan_speed_rpm";
- fan->fst_speed.attr.mode = 0444;
- status = sysfs_create_file(&device->dev.kobj, &fan->fst_speed.attr);
- if (status)
- goto rem_fine_grain_attr;
- for (i = 0; i < fan->fps_count; ++i) {
- struct acpi_fan_fps *fps = &fan->fps[i];
- snprintf(fps->name, ACPI_FPS_NAME_LEN, "state%d", i);
- sysfs_attr_init(&fps->dev_attr.attr);
- fps->dev_attr.show = show_state;
- fps->dev_attr.store = NULL;
- fps->dev_attr.attr.name = fps->name;
- fps->dev_attr.attr.mode = 0444;
- status = sysfs_create_file(&device->dev.kobj, &fps->dev_attr.attr);
- if (status) {
- int j;
- for (j = 0; j < i; ++j)
- sysfs_remove_file(&device->dev.kobj, &fan->fps[j].dev_attr.attr);
- goto rem_fst_attr;
- }
- }
- return 0;
- rem_fst_attr:
- sysfs_remove_file(&device->dev.kobj, &fan->fst_speed.attr);
- rem_fine_grain_attr:
- sysfs_remove_file(&device->dev.kobj, &fan->fine_grain_control.attr);
- return status;
- }
- void acpi_fan_delete_attributes(struct acpi_device *device)
- {
- struct acpi_fan *fan = acpi_driver_data(device);
- int i;
- for (i = 0; i < fan->fps_count; ++i)
- sysfs_remove_file(&device->dev.kobj, &fan->fps[i].dev_attr.attr);
- sysfs_remove_file(&device->dev.kobj, &fan->fst_speed.attr);
- sysfs_remove_file(&device->dev.kobj, &fan->fine_grain_control.attr);
- }
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