mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:46:16 +00:00
64ee252826
Follow the advice of the Documentation/filesystems/sysfs.rst and show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* fan_attr.c - Create extra attributes for ACPI Fan driver
|
|
*
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
* 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 += sysfs_emit_at(buf, count, "not-defined:");
|
|
else
|
|
count += sysfs_emit_at(buf, count, "%lld:", fps->trip_point);
|
|
|
|
if (fps->speed == 0xFFFFFFFF)
|
|
count += sysfs_emit_at(buf, count, "not-defined:");
|
|
else
|
|
count += sysfs_emit_at(buf, count, "%lld:", fps->speed);
|
|
|
|
if (fps->noise_level == 0xFFFFFFFF)
|
|
count += sysfs_emit_at(buf, count, "not-defined:");
|
|
else
|
|
count += sysfs_emit_at(buf, count, "%lld:", fps->noise_level * 100);
|
|
|
|
if (fps->power == 0xFFFFFFFF)
|
|
count += sysfs_emit_at(buf, count, "not-defined\n");
|
|
else
|
|
count += sysfs_emit_at(buf, 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);
|
|
}
|