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proc: switch /proc/apm to seq_file interface

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Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2008-04-29 01:01:46 -07:00 committed by Linus Torvalds
parent 8331438b38
commit 647634df40
1 changed files with 18 additions and 5 deletions
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23
drivers/char/apm-emulation.c
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@ -14,6 +14,7 @@
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/miscdevice.h>
#include <linux/apm_bios.h>
#include <linux/capability.h>
@ -493,11 +494,10 @@ static struct miscdevice apm_device = {
* -1: Unknown
* 8) min = minutes; sec = seconds
*/
static int apm_get_info(char *buf, char **start, off_t fpos, int length)
static int proc_apm_show(struct seq_file *m, void *v)
{
struct apm_power_info info;
char *units;
int ret;
info.ac_line_status = 0xff;
info.battery_status = 0xff;
@ -515,14 +515,27 @@ static int apm_get_info(char *buf, char **start, off_t fpos, int length)
case 1: units = "sec"; break;
}
ret = sprintf(buf, "%s 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
seq_printf(m, "%s 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
driver_version, APM_32_BIT_SUPPORT,
info.ac_line_status, info.battery_status,
info.battery_flag, info.battery_life,
info.time, units);
return ret;
return 0;
}
static int proc_apm_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_apm_show, NULL);
}
static const struct file_operations apm_proc_fops = {
.owner = THIS_MODULE,
.open = proc_apm_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#endif
static int kapmd(void *arg)
@ -593,7 +606,7 @@ static int __init apm_init(void)
wake_up_process(kapmd_tsk);
#ifdef CONFIG_PROC_FS
create_proc_info_entry("apm", 0, NULL, apm_get_info);
proc_create("apm", 0, NULL, &apm_proc_fops);
#endif
ret = misc_register(&apm_device);