/* * An RTC test device/driver * Copyright (C) 2005 Tower Technologies * Author: Alessandro Zummo <a.zummo@towertech.it> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h>#include <linux/err.h>#include <linux/rtc.h>#include <linux/platform_device.h> static int test_mmss64;module_param(test_mmss64, int, 0644);MODULE_PARM_DESC(test_mmss64, "Test struct rtc_class_ops.set_mmss64()."); static struct platform_device *test0 = NULL, *test1 = NULL; static int test_rtc_read_alarm(struct device *dev,	struct rtc_wkalrm *alrm){	return 0;} static int test_rtc_set_alarm(struct device *dev,	struct rtc_wkalrm *alrm){	return 0;} static int test_rtc_read_time(struct device *dev,	struct rtc_time *tm){	rtc_time64_to_tm(ktime_get_real_seconds(), tm);	return 0;} static int test_rtc_set_mmss64(struct device *dev, time64_t secs){	dev_info(dev, "%s, secs = %lld\n", __func__, (long long)secs);	return 0;} static int test_rtc_set_mmss(struct device *dev, unsigned long secs){	dev_info(dev, "%s, secs = %lu\n", __func__, secs);	return 0;} static int test_rtc_proc(struct device *dev, struct seq_file *seq){	struct platform_device *plat_dev = to_platform_device(dev); 	seq_printf(seq, "test\t\t: yes\n");	seq_printf(seq, "id\t\t: %d\n", plat_dev->id); 	return 0;} static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable){	return 0;} static struct rtc_class_ops test_rtc_ops = {	.proc = test_rtc_proc,	.read_time = test_rtc_read_time,	.read_alarm = test_rtc_read_alarm,	.set_alarm = test_rtc_set_alarm,	.set_mmss = test_rtc_set_mmss,	.alarm_irq_enable = test_rtc_alarm_irq_enable,}; static ssize_t test_irq_show(struct device *dev,				struct device_attribute *attr, char *buf){	return sprintf(buf, "%d\n", 42);}static ssize_t test_irq_store(struct device *dev,				struct device_attribute *attr,				const char *buf, size_t count){	int retval;	struct platform_device *plat_dev = to_platform_device(dev);	struct rtc_device *rtc = platform_get_drvdata(plat_dev); 	retval = count;	if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled)		rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);	else if (strncmp(buf, "alarm", 5) == 0) {		struct rtc_wkalrm alrm;		int err = rtc_read_alarm(rtc, &alrm); 		if (!err && alrm.enabled)			rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); 	} else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled)		rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);	else		retval = -EINVAL; 	return retval;}static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); static int test_probe(struct platform_device *plat_dev){	int err;	struct rtc_device *rtc; 	if (test_mmss64) {		test_rtc_ops.set_mmss64 = test_rtc_set_mmss64;		test_rtc_ops.set_mmss = NULL;	} 	rtc = devm_rtc_device_register(&plat_dev->dev, "test",				&test_rtc_ops, THIS_MODULE);	if (IS_ERR(rtc)) {		return PTR_ERR(rtc);	} 	err = device_create_file(&plat_dev->dev, &dev_attr_irq);	if (err)		dev_err(&plat_dev->dev, "Unable to create sysfs entry: %s\n",			dev_attr_irq.attr.name); 	platform_set_drvdata(plat_dev, rtc); 	return 0;} static int test_remove(struct platform_device *plat_dev){	device_remove_file(&plat_dev->dev, &dev_attr_irq); 	return 0;} static struct platform_driver test_driver = {	.probe	= test_probe,	.remove = test_remove,	.driver = {		.name = "rtc-test",	},}; static int __init test_init(void){	int err; 	if ((err = platform_driver_register(&test_driver)))		return err; 	if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {		err = -ENOMEM;		goto exit_driver_unregister;	} 	if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {		err = -ENOMEM;		goto exit_put_test0;	} 	if ((err = platform_device_add(test0)))		goto exit_put_test1; 	if ((err = platform_device_add(test1)))		goto exit_del_test0; 	return 0; exit_del_test0:	platform_device_del(test0); exit_put_test1:	platform_device_put(test1); exit_put_test0:	platform_device_put(test0); exit_driver_unregister:	platform_driver_unregister(&test_driver);	return err;} static void __exit test_exit(void){	platform_device_unregister(test0);	platform_device_unregister(test1);	platform_driver_unregister(&test_driver);} MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");MODULE_DESCRIPTION("RTC test driver/device");MODULE_LICENSE("GPL"); module_init(test_init);module_exit(test_exit);