1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/cpufreq.h>
3*4882a593Smuzhiyun #include <linux/fs.h>
4*4882a593Smuzhiyun #include <linux/init.h>
5*4882a593Smuzhiyun #include <linux/proc_fs.h>
6*4882a593Smuzhiyun #include <linux/seq_file.h>
7*4882a593Smuzhiyun
arch_freq_prepare_all(void)8*4882a593Smuzhiyun __weak void arch_freq_prepare_all(void)
9*4882a593Smuzhiyun {
10*4882a593Smuzhiyun }
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun extern const struct seq_operations cpuinfo_op;
cpuinfo_open(struct inode * inode,struct file * file)13*4882a593Smuzhiyun static int cpuinfo_open(struct inode *inode, struct file *file)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun arch_freq_prepare_all();
16*4882a593Smuzhiyun return seq_open(file, &cpuinfo_op);
17*4882a593Smuzhiyun }
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct proc_ops cpuinfo_proc_ops = {
20*4882a593Smuzhiyun .proc_flags = PROC_ENTRY_PERMANENT,
21*4882a593Smuzhiyun .proc_open = cpuinfo_open,
22*4882a593Smuzhiyun .proc_read_iter = seq_read_iter,
23*4882a593Smuzhiyun .proc_lseek = seq_lseek,
24*4882a593Smuzhiyun .proc_release = seq_release,
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
proc_cpuinfo_init(void)27*4882a593Smuzhiyun static int __init proc_cpuinfo_init(void)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun proc_create("cpuinfo", 0, NULL, &cpuinfo_proc_ops);
30*4882a593Smuzhiyun return 0;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun fs_initcall(proc_cpuinfo_init);
33