diff options
Diffstat (limited to 'drivers/rtc/rtc-proc.c')
| -rw-r--r-- | drivers/rtc/rtc-proc.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-proc.c b/drivers/rtc/rtc-proc.c new file mode 100644 index 000000000000..90b8a97a0919 --- /dev/null +++ b/drivers/rtc/rtc-proc.c @@ -0,0 +1,162 @@ +/* + * RTC subsystem, proc interface + * + * Copyright (C) 2005-06 Tower Technologies + * Author: Alessandro Zummo <a.zummo@towertech.it> + * + * based on arch/arm/common/rtctime.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/module.h> +#include <linux/rtc.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> + +static struct class_device *rtc_dev = NULL; +static DEFINE_MUTEX(rtc_lock); + +static int rtc_proc_show(struct seq_file *seq, void *offset) +{ + int err; + struct class_device *class_dev = seq->private; + struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops; + struct rtc_wkalrm alrm; + struct rtc_time tm; + + err = rtc_read_time(class_dev, &tm); + if (err == 0) { + seq_printf(seq, + "rtc_time\t: %02d:%02d:%02d\n" + "rtc_date\t: %04d-%02d-%02d\n", + tm.tm_hour, tm.tm_min, tm.tm_sec, + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); + } + + err = rtc_read_alarm(class_dev, &alrm); + if (err == 0) { + seq_printf(seq, "alrm_time\t: "); + if ((unsigned int)alrm.time.tm_hour <= 24) + seq_printf(seq, "%02d:", alrm.time.tm_hour); + else + seq_printf(seq, "**:"); + if ((unsigned int)alrm.time.tm_min <= 59) + seq_printf(seq, "%02d:", alrm.time.tm_min); + else + seq_printf(seq, "**:"); + if ((unsigned int)alrm.time.tm_sec <= 59) + seq_printf(seq, "%02d\n", alrm.time.tm_sec); + else + seq_printf(seq, "**\n"); + + seq_printf(seq, "alrm_date\t: "); + if ((unsigned int)alrm.time.tm_year <= 200) + seq_printf(seq, "%04d-", alrm.time.tm_year + 1900); + else + seq_printf(seq, "****-"); + if ((unsigned int)alrm.time.tm_mon <= 11) + seq_printf(seq, "%02d-", alrm.time.tm_mon + 1); + else + seq_printf(seq, "**-"); + if ((unsigned int)alrm.time.tm_mday <= 31) + seq_printf(seq, "%02d\n", alrm.time.tm_mday); + else + seq_printf(seq, "**\n"); + seq_printf(seq, "alrm_wakeup\t: %s\n", + alrm.enabled ? "yes" : "no"); + seq_printf(seq, "alrm_pending\t: %s\n", + alrm.pending ? "yes" : "no"); + } + + if (ops->proc) + ops->proc(class_dev->dev, seq); + + return 0; +} + +static int rtc_proc_open(struct inode *inode, struct file *file) +{ + struct class_device *class_dev = PDE(inode)->data; + + if (!try_module_get(THIS_MODULE)) + return -ENODEV; + + return single_open(file, rtc_proc_show, class_dev); +} + +static int rtc_proc_release(struct inode *inode, struct file *file) +{ + int res = single_release(inode, file); + module_put(THIS_MODULE); + return res; +} + +static struct file_operations rtc_proc_fops = { + .open = rtc_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = rtc_proc_release, +}; + +static int rtc_proc_add_device(struct class_device *class_dev, + struct class_interface *class_intf) +{ + mutex_lock(&rtc_lock); + if (rtc_dev == NULL) { + struct proc_dir_entry *ent; + + rtc_dev = class_dev; + + ent = create_proc_entry("driver/rtc", 0, NULL); + if (ent) { + struct rtc_device *rtc = to_rtc_device(class_dev); + + ent->proc_fops = &rtc_proc_fops; + ent->owner = rtc->owner; + ent->data = class_dev; + + dev_info(class_dev->dev, "rtc intf: proc\n"); + } + else + rtc_dev = NULL; + } + mutex_unlock(&rtc_lock); + + return 0; +} + +static void rtc_proc_remove_device(struct class_device *class_dev, + struct class_interface *class_intf) +{ + mutex_lock(&rtc_lock); + if (rtc_dev == class_dev) { + remove_proc_entry("driver/rtc", NULL); + rtc_dev = NULL; + } + mutex_unlock(&rtc_lock); +} + +static struct class_interface rtc_proc_interface = { + .add = &rtc_proc_add_device, + .remove = &rtc_proc_remove_device, +}; + +static int __init rtc_proc_init(void) +{ + return rtc_interface_register(&rtc_proc_interface); +} + +static void __exit rtc_proc_exit(void) +{ + class_interface_unregister(&rtc_proc_interface); +} + +module_init(rtc_proc_init); +module_exit(rtc_proc_exit); + +MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); +MODULE_DESCRIPTION("RTC class proc interface"); +MODULE_LICENSE("GPL"); |