arch/arm/plat-omap/psp-version.c

   1 /*
   2  * linux/arch/arm/mach-omap2/ti-psp-version.c
   3  *
   4  * Create a proc entry for showing PSP version.
   5  *
   6  * Copyright (C) 2008 Texas Instruments Incorporated.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/init.h>
  26 #include <linux/proc_fs.h>
  27 #include <asm/uaccess.h>
  28
  29 #include "psp-version.h"
  30
  31 static int init_psp_module(void);
  32 static void exit_psp_module(void);
  33
  34
  35 static struct proc_dir_entry    *vers_file;
  36
  37 static int show_version(char *page, char **start,
  38                              off_t off, int count,
  39                              int *eof, void *data)
  40 {
  41         int len;
  42
  43         len = sprintf(page, TI_PSP_DEVICE \
  44                         " Linux PSP version " TI_PSP_VERSION \
  45                         " (" TI_PSP_PLATFORM ")\n");
  46
  47         return len;
  48 }
  49
  50 static int __init init_psp_module(void)
  51 {
  52         int result = 0;
  53
  54         /*
  55          * Create the file "/proc/ti-psp-version"
  56          */
  57         vers_file = create_proc_read_entry(
  58                         TI_PSP_ENTRY,
  59                         0444,
  60                         NULL,
  61                         show_version,
  62                         NULL);
  63
  64         if (vers_file != NULL) {
  65
  66                 printk (KERN_INFO TI_PSP_DEVICE \
  67                                         " Linux PSP version " TI_PSP_VERSION \
  68                                         " (" TI_PSP_PLATFORM ")\n");
  69         }
  70         else {
  71                 result = -ENOMEM;
  72         }
  73
  74         return result;
  75 }
  76
  77 static void __exit exit_psp_module(void)
  78 {
  79         remove_proc_entry(TI_PSP_ENTRY, NULL);
  80 }
  81
  82 module_init(init_psp_module);
  83 module_exit(exit_psp_module);
  84
  85 MODULE_LICENSE("GPLv2");
  86 MODULE_AUTHOR("Texas Instruments Incorporated");
  87 MODULE_DESCRIPTION("Contains version of the Linux PSP release.");