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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293// SPDX-License-Identifier: GPL-2.0/* * RTC subsystem, proc interface * * Copyright (C) 2005-06 Tower Technologies * Author: Alessandro Zummo <a.zummo@towertech.it> * * 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);}#elsestatic 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);}