forked from Minki/linux
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* fan_attr.c - Create extra attributes for ACPI Fan driver
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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* Copyright (C) 2022 Intel Corporation. All rights reserved.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/acpi.h>
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#include "fan.h"
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MODULE_LICENSE("GPL");
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static ssize_t show_state(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct acpi_fan_fps *fps = container_of(attr, struct acpi_fan_fps, dev_attr);
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int count;
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if (fps->control == 0xFFFFFFFF || fps->control > 100)
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count = scnprintf(buf, PAGE_SIZE, "not-defined:");
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else
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count = scnprintf(buf, PAGE_SIZE, "%lld:", fps->control);
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if (fps->trip_point == 0xFFFFFFFF || fps->trip_point > 9)
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count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
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else
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count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->trip_point);
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if (fps->speed == 0xFFFFFFFF)
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count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
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else
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count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->speed);
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if (fps->noise_level == 0xFFFFFFFF)
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count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
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else
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count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->noise_level * 100);
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if (fps->power == 0xFFFFFFFF)
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count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined\n");
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else
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count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld\n", fps->power);
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return count;
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}
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int acpi_fan_create_attributes(struct acpi_device *device)
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{
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struct acpi_fan *fan = acpi_driver_data(device);
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int i, status = 0;
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for (i = 0; i < fan->fps_count; ++i) {
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struct acpi_fan_fps *fps = &fan->fps[i];
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snprintf(fps->name, ACPI_FPS_NAME_LEN, "state%d", i);
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sysfs_attr_init(&fps->dev_attr.attr);
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fps->dev_attr.show = show_state;
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fps->dev_attr.store = NULL;
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fps->dev_attr.attr.name = fps->name;
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fps->dev_attr.attr.mode = 0444;
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status = sysfs_create_file(&device->dev.kobj, &fps->dev_attr.attr);
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if (status) {
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int j;
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for (j = 0; j < i; ++j)
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sysfs_remove_file(&device->dev.kobj, &fan->fps[j].dev_attr.attr);
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break;
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}
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}
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return status;
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}
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void acpi_fan_delete_attributes(struct acpi_device *device)
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{
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struct acpi_fan *fan = acpi_driver_data(device);
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int i;
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for (i = 0; i < fan->fps_count; ++i)
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sysfs_remove_file(&device->dev.kobj, &fan->fps[i].dev_attr.attr);
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}
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