// 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 = scnprintf(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);}