Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / rtc / rtc-proc.c

diff --git a/kernel/drivers/rtc/rtc-proc.c b/kernel/drivers/rtc/rtc-proc.c
new file mode 100644 (file)
index 0000000..ffa69e1
--- /dev/null
+++ b/kernel/drivers/rtc/rtc-proc.c
@@ -0,0 +1,148 @@
+/*
+ * 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>
+
+#include "rtc-core.h"
+
+#define NAME_SIZE      10
+
+#if defined(CONFIG_RTC_HCTOSYS_DEVICE)
+static bool is_rtc_hctosys(struct rtc_device *rtc)
+{
+       int size;
+       char name[NAME_SIZE];
+
+       size = scnprintf(name, NAME_SIZE, "rtc%d", rtc->id);
+       if (size > NAME_SIZE)
+               return false;
+
+       return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);
+}
+#else
+static bool is_rtc_hctosys(struct rtc_device *rtc)
+{
+       return (rtc->id == 0);
+}
+#endif
+
+static int rtc_proc_show(struct seq_file *seq, void *offset)
+{
+       int err;
+       struct rtc_device *rtc = seq->private;
+       const struct rtc_class_ops *ops = rtc->ops;
+       struct rtc_wkalrm alrm;
+       struct rtc_time tm;
+
+       err = rtc_read_time(rtc, &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(rtc, &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 (alrm.time.tm_mday && (unsigned int)alrm.time.tm_mday <= 31)
+                       seq_printf(seq, "%02d\n", alrm.time.tm_mday);
+               else
+                       seq_printf(seq, "**\n");
+               seq_printf(seq, "alarm_IRQ\t: %s\n",
+                               alrm.enabled ? "yes" : "no");
+               seq_printf(seq, "alrm_pending\t: %s\n",
+                               alrm.pending ? "yes" : "no");
+               seq_printf(seq, "update IRQ enabled\t: %s\n",
+                       (rtc->uie_rtctimer.enabled) ? "yes" : "no");
+               seq_printf(seq, "periodic IRQ enabled\t: %s\n",
+                       (rtc->pie_enabled) ? "yes" : "no");
+               seq_printf(seq, "periodic IRQ frequency\t: %d\n",
+                       rtc->irq_freq);
+               seq_printf(seq, "max user IRQ frequency\t: %d\n",
+                       rtc->max_user_freq);
+       }
+
+       seq_printf(seq, "24hr\t\t: yes\n");
+
+       if (ops->proc)
+               ops->proc(rtc->dev.parent, seq);
+
+       return 0;
+}
+
+static int rtc_proc_open(struct inode *inode, struct file *file)
+{
+       int ret;
+       struct rtc_device *rtc = PDE_DATA(inode);
+
+       if (!try_module_get(THIS_MODULE))
+               return -ENODEV;
+
+       ret = single_open(file, rtc_proc_show, rtc);
+       if (ret)
+               module_put(THIS_MODULE);
+       return ret;
+}
+
+static int rtc_proc_release(struct inode *inode, struct file *file)
+{
+       int res = single_release(inode, file);
+       module_put(THIS_MODULE);
+       return res;
+}
+
+static const struct file_operations rtc_proc_fops = {
+       .open           = rtc_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = rtc_proc_release,
+};
+
+void rtc_proc_add_device(struct rtc_device *rtc)
+{
+       if (is_rtc_hctosys(rtc))
+               proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc);
+}
+
+void rtc_proc_del_device(struct rtc_device *rtc)
+{
+       if (is_rtc_hctosys(rtc))
+               remove_proc_entry("driver/rtc", NULL);
+}