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1// SPDX-License-Identifier: GPL-2.02/*3 * RTC subsystem, proc interface4 *5 * Copyright (C) 2005-06 Tower Technologies6 * Author: Alessandro Zummo <a.zummo@towertech.it>7 *8 * based on arch/arm/common/rtctime.c9 */10 11#include <linux/module.h>12#include <linux/rtc.h>13#include <linux/proc_fs.h>14#include <linux/seq_file.h>15 16#include "rtc-core.h"17 18#define NAME_SIZE 1019 20#if defined(CONFIG_RTC_HCTOSYS_DEVICE)21static bool is_rtc_hctosys(struct rtc_device *rtc)22{23 int size;24 char name[NAME_SIZE];25 26 size = snprintf(name, NAME_SIZE, "rtc%d", rtc->id);27 if (size >= NAME_SIZE)28 return false;29 30 return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);31}32#else33static bool is_rtc_hctosys(struct rtc_device *rtc)34{35 return (rtc->id == 0);36}37#endif38 39static int rtc_proc_show(struct seq_file *seq, void *offset)40{41 int err;42 struct rtc_device *rtc = seq->private;43 const struct rtc_class_ops *ops = rtc->ops;44 struct rtc_wkalrm alrm;45 struct rtc_time tm;46 47 err = rtc_read_time(rtc, &tm);48 if (err == 0) {49 seq_printf(seq,50 "rtc_time\t: %ptRt\n"51 "rtc_date\t: %ptRd\n",52 &tm, &tm);53 }54 55 err = rtc_read_alarm(rtc, &alrm);56 if (err == 0) {57 seq_printf(seq, "alrm_time\t: %ptRt\n", &alrm.time);58 seq_printf(seq, "alrm_date\t: %ptRd\n", &alrm.time);59 seq_printf(seq, "alarm_IRQ\t: %s\n",60 alrm.enabled ? "yes" : "no");61 seq_printf(seq, "alrm_pending\t: %s\n",62 alrm.pending ? "yes" : "no");63 seq_printf(seq, "update IRQ enabled\t: %s\n",64 (rtc->uie_rtctimer.enabled) ? "yes" : "no");65 seq_printf(seq, "periodic IRQ enabled\t: %s\n",66 (rtc->pie_enabled) ? "yes" : "no");67 seq_printf(seq, "periodic IRQ frequency\t: %d\n",68 rtc->irq_freq);69 seq_printf(seq, "max user IRQ frequency\t: %d\n",70 rtc->max_user_freq);71 }72 73 seq_printf(seq, "24hr\t\t: yes\n");74 75 if (ops->proc)76 ops->proc(rtc->dev.parent, seq);77 78 return 0;79}80 81void rtc_proc_add_device(struct rtc_device *rtc)82{83 if (is_rtc_hctosys(rtc))84 proc_create_single_data("driver/rtc", 0, NULL, rtc_proc_show,85 rtc);86}87 88void rtc_proc_del_device(struct rtc_device *rtc)89{90 if (is_rtc_hctosys(rtc))91 remove_proc_entry("driver/rtc", NULL);92}93