// SPDX-License-Identifier: GPL-2.0
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/*
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* RTC subsystem, proc interface
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*
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* Copyright (C) 2005-06 Tower Technologies
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* Author: Alessandro Zummo <a.zummo@towertech.it>
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*
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* based on arch/arm/common/rtctime.c
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*/
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#include <linux/module.h>
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#include <linux/rtc.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include "rtc-core.h"
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#define NAME_SIZE 10
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#if defined(CONFIG_RTC_HCTOSYS_DEVICE)
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static bool is_rtc_hctosys(struct rtc_device *rtc)
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{
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int size;
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char name[NAME_SIZE];
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size = snprintf(name, NAME_SIZE, "rtc%d", rtc->id);
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if (size >= NAME_SIZE)
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return false;
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return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);
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}
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#else
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static bool is_rtc_hctosys(struct rtc_device *rtc)
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{
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return (rtc->id == 0);
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}
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#endif
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static int rtc_proc_show(struct seq_file *seq, void *offset)
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{
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int err;
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struct rtc_device *rtc = seq->private;
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const struct rtc_class_ops *ops = rtc->ops;
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struct rtc_wkalrm alrm;
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struct rtc_time tm;
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err = rtc_read_time(rtc, &tm);
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if (err == 0) {
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seq_printf(seq,
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"rtc_time\t: %ptRt\n"
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"rtc_date\t: %ptRd\n",
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&tm, &tm);
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}
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err = rtc_read_alarm(rtc, &alrm);
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if (err == 0) {
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seq_printf(seq, "alrm_time\t: %ptRt\n", &alrm.time);
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seq_printf(seq, "alrm_date\t: %ptRd\n", &alrm.time);
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seq_printf(seq, "alarm_IRQ\t: %s\n",
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alrm.enabled ? "yes" : "no");
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seq_printf(seq, "alrm_pending\t: %s\n",
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alrm.pending ? "yes" : "no");
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seq_printf(seq, "update IRQ enabled\t: %s\n",
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(rtc->uie_rtctimer.enabled) ? "yes" : "no");
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seq_printf(seq, "periodic IRQ enabled\t: %s\n",
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(rtc->pie_enabled) ? "yes" : "no");
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seq_printf(seq, "periodic IRQ frequency\t: %d\n",
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rtc->irq_freq);
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seq_printf(seq, "max user IRQ frequency\t: %d\n",
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rtc->max_user_freq);
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}
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seq_printf(seq, "24hr\t\t: yes\n");
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if (ops->proc)
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ops->proc(rtc->dev.parent, seq);
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return 0;
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}
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void rtc_proc_add_device(struct rtc_device *rtc)
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{
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if (is_rtc_hctosys(rtc))
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proc_create_single_data("driver/rtc", 0, NULL, rtc_proc_show,
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rtc);
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}
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void rtc_proc_del_device(struct rtc_device *rtc)
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{
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if (is_rtc_hctosys(rtc))
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remove_proc_entry("driver/rtc", NULL);
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}
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