| /* Copyright (c) 2013, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * 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/types.h> |
| #include <linux/uaccess.h> |
| #include <linux/debugfs.h> |
| |
| /* |
| * Subsequent patches should add an entry to end of this string. |
| * Format is incrementing sequence number followed by text of |
| * patch commit title with newline. |
| * Note trailing ';' is on its own line to simplify addition of |
| * future strings. |
| */ |
| static char *descriptions = |
| "0 msm: perf: add debug patch logging framework\n" |
| "1 Perf: Restore counter after powercollapse for generic ARM PMU's\n" |
| "2 Perf: Toggle PMU IRQ when CPU's are hotplugged\n" |
| "3 Perf: Correct irq for CPU hotplug detection\n" |
| "4 Perf: Check perf activity on correct CPU\n" |
| "5 Perf: Add DT support for L1 and L2 PMU\n" |
| ; |
| |
| static ssize_t desc_read(struct file *fp, char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| return simple_read_from_buffer(buf, count, pos, descriptions, |
| strlen(descriptions)); |
| } |
| |
| static const struct file_operations perf_debug_desc_fops = { |
| .read = desc_read, |
| }; |
| |
| static int msm_perf_debugfs_init(void) |
| { |
| int ret = 0; |
| struct dentry *dir; |
| struct dentry *file; |
| |
| dir = debugfs_create_dir("msm-perf-patches", NULL); |
| if (IS_ERR_OR_NULL(dir)) { |
| pr_err("failed to create msm-perf-patches dir in debugfs\n"); |
| ret = PTR_ERR(dir); |
| goto init_exit; |
| } |
| |
| file = debugfs_create_file("descriptions", 0444, dir, NULL, |
| &perf_debug_desc_fops); |
| if (IS_ERR_OR_NULL(file)) { |
| debugfs_remove(dir); |
| pr_err("failed to create descriptions file for msm-perf-patches\n"); |
| ret = PTR_ERR(file); |
| goto init_exit; |
| } |
| |
| init_exit: |
| return ret; |
| } |
| late_initcall(msm_perf_debugfs_init); |