/* * debugfs file to track time spent in suspend * * Copyright (c) 2011, Google, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for * more details. */ #include <linux/debugfs.h>#include <linux/err.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/seq_file.h>#include <linux/time.h> static unsigned int sleep_time_bin[32] = {0}; static int tk_debug_show_sleep_time(struct seq_file *s, void *data){	unsigned int bin;	seq_puts(s, "      time (secs)        count\n");	seq_puts(s, "------------------------------\n");	for (bin = 0; bin < 32; bin++) {		if (sleep_time_bin[bin] == 0)			continue;		seq_printf(s, "%10u - %-10u %4u\n",			bin ? 1 << (bin - 1) : 0, 1 << bin,				sleep_time_bin[bin]);	}	return 0;} static int tk_debug_sleep_time_open(struct inode *inode, struct file *file){	return single_open(file, tk_debug_show_sleep_time, NULL);} static const struct file_operations tk_debug_sleep_time_fops = {	.open		= tk_debug_sleep_time_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; static int __init tk_debug_sleep_time_init(void){	struct dentry *d; 	d = debugfs_create_file("sleep_time", 0444, NULL, NULL,		&tk_debug_sleep_time_fops);	if (!d) {		pr_err("Failed to create sleep_time debug file\n");		return -ENOMEM;	} 	return 0;}late_initcall(tk_debug_sleep_time_init); void tk_debug_account_sleep_time(struct timespec *t){	sleep_time_bin[fls(t->tv_sec)]++;}