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- // SPDX-License-Identifier: GPL-2.0
- /*
- * RTC subsystem, proc interface
- *
- * Copyright (C) 2005-06 Tower Technologies
- * Author: Alessandro Zummo <[email protected]>
- *
- * based on arch/arm/common/rtctime.c
- */
- #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 = snprintf(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: %ptRt\n"
- "rtc_date\t: %ptRd\n",
- &tm, &tm);
- }
- err = rtc_read_alarm(rtc, &alrm);
- if (err == 0) {
- seq_printf(seq, "alrm_time\t: %ptRt\n", &alrm.time);
- seq_printf(seq, "alrm_date\t: %ptRd\n", &alrm.time);
- 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;
- }
- void rtc_proc_add_device(struct rtc_device *rtc)
- {
- if (is_rtc_hctosys(rtc))
- proc_create_single_data("driver/rtc", 0, NULL, rtc_proc_show,
- rtc);
- }
- void rtc_proc_del_device(struct rtc_device *rtc)
- {
- if (is_rtc_hctosys(rtc))
- remove_proc_entry("driver/rtc", NULL);
- }
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