linux/drivers/base/power/wakeup_stats.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Wakeup statistics in sysfs
 *
 * Copyright (c) 2019 Linux Foundation
 * Copyright (c) 2019 Greg Kroah-Hartman <[email protected]>
 * Copyright (c) 2019 Google Inc.
 */

#include <linux/device.h>
#include <linux/idr.h>
#include <linux/init.h>
#include <linux/kdev_t.h>
#include <linux/kernel.h>
#include <linux/kobject.h>
#include <linux/slab.h>
#include <linux/timekeeping.h>

#include "power.h"

static struct class *wakeup_class;

#define wakeup_attr(_name) …

wakeup_attr(…);
wakeup_attr(…);
wakeup_attr(…);
wakeup_attr(…);

static ssize_t active_time_ms_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(active_time_ms);

static ssize_t total_time_ms_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(total_time_ms);

static ssize_t max_time_ms_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(max_time_ms);

static ssize_t last_change_ms_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(last_change_ms);

static ssize_t name_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{ … }
static DEVICE_ATTR_RO(name);

static ssize_t prevent_suspend_time_ms_show(struct device *dev,
					    struct device_attribute *attr,
					    char *buf)
{ … }
static DEVICE_ATTR_RO(prevent_suspend_time_ms);

static struct attribute *wakeup_source_attrs[] = …;
ATTRIBUTE_GROUPS(…);

static void device_create_release(struct device *dev)
{ … }

static struct device *wakeup_source_device_create(struct device *parent,
						  struct wakeup_source *ws)
{ … }

/**
 * wakeup_source_sysfs_add - Add wakeup_source attributes to sysfs.
 * @parent: Device given wakeup source is associated with (or NULL if virtual).
 * @ws: Wakeup source to be added in sysfs.
 */
int wakeup_source_sysfs_add(struct device *parent, struct wakeup_source *ws)
{ … }

/**
 * pm_wakeup_source_sysfs_add - Add wakeup_source attributes to sysfs
 * for a device if they're missing.
 * @parent: Device given wakeup source is associated with
 */
int pm_wakeup_source_sysfs_add(struct device *parent)
{ … }

/**
 * wakeup_source_sysfs_remove - Remove wakeup_source attributes from sysfs.
 * @ws: Wakeup source to be removed from sysfs.
 */
void wakeup_source_sysfs_remove(struct wakeup_source *ws)
{ … }

static int __init wakeup_sources_sysfs_init(void)
{ … }
postcore_initcall(wakeup_sources_sysfs_init);