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Alessandro Zummoa95579c2006-03-27 01:16:42 -08001/*
2 * An RTC test device/driver
3 * Copyright (C) 2005 Tower Technologies
4 * Author: Alessandro Zummo <a.zummo@towertech.it>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/module.h>
12#include <linux/err.h>
13#include <linux/rtc.h>
14#include <linux/platform_device.h>
15
16static struct platform_device *test0 = NULL, *test1 = NULL;
17
18static int test_rtc_read_alarm(struct device *dev,
19 struct rtc_wkalrm *alrm)
20{
21 return 0;
22}
23
24static int test_rtc_set_alarm(struct device *dev,
25 struct rtc_wkalrm *alrm)
26{
27 return 0;
28}
29
30static int test_rtc_read_time(struct device *dev,
31 struct rtc_time *tm)
32{
33 rtc_time_to_tm(get_seconds(), tm);
34 return 0;
35}
36
Alessandro Zummoa95579c2006-03-27 01:16:42 -080037static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
38{
Alessandro Zummobbccf832009-01-06 14:42:21 -080039 dev_info(dev, "%s, secs = %lu\n", __func__, secs);
Alessandro Zummoa95579c2006-03-27 01:16:42 -080040 return 0;
41}
42
43static int test_rtc_proc(struct device *dev, struct seq_file *seq)
44{
45 struct platform_device *plat_dev = to_platform_device(dev);
46
Alessandro Zummoa95579c2006-03-27 01:16:42 -080047 seq_printf(seq, "test\t\t: yes\n");
48 seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
49
50 return 0;
51}
52
John Stultz16380c12011-02-02 17:02:41 -080053static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
Alessandro Zummoa95579c2006-03-27 01:16:42 -080054{
John Stultz16380c12011-02-02 17:02:41 -080055 return 0;
Alessandro Zummoa95579c2006-03-27 01:16:42 -080056}
57
David Brownellff8371a2006-09-30 23:28:17 -070058static const struct rtc_class_ops test_rtc_ops = {
Alessandro Zummoa95579c2006-03-27 01:16:42 -080059 .proc = test_rtc_proc,
60 .read_time = test_rtc_read_time,
Alessandro Zummoa95579c2006-03-27 01:16:42 -080061 .read_alarm = test_rtc_read_alarm,
62 .set_alarm = test_rtc_set_alarm,
63 .set_mmss = test_rtc_set_mmss,
John Stultz16380c12011-02-02 17:02:41 -080064 .alarm_irq_enable = test_rtc_alarm_irq_enable,
Alessandro Zummoa95579c2006-03-27 01:16:42 -080065};
66
67static ssize_t test_irq_show(struct device *dev,
68 struct device_attribute *attr, char *buf)
69{
70 return sprintf(buf, "%d\n", 42);
71}
72static ssize_t test_irq_store(struct device *dev,
73 struct device_attribute *attr,
74 const char *buf, size_t count)
75{
76 int retval;
77 struct platform_device *plat_dev = to_platform_device(dev);
78 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
79
80 retval = count;
Marcelo Roberto Jimeneza4174932011-02-07 19:16:07 -020081 if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled)
David Brownellab6a2d72007-05-08 00:33:30 -070082 rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
Marcelo Roberto Jimeneza4174932011-02-07 19:16:07 -020083 else if (strncmp(buf, "alarm", 5) == 0) {
84 struct rtc_wkalrm alrm;
85 int err = rtc_read_alarm(rtc, &alrm);
86
87 if (!err && alrm.enabled)
88 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
89
90 } else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled)
David Brownellab6a2d72007-05-08 00:33:30 -070091 rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
Alessandro Zummoa95579c2006-03-27 01:16:42 -080092 else
93 retval = -EINVAL;
94
95 return retval;
96}
97static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
98
99static int test_probe(struct platform_device *plat_dev)
100{
101 int err;
102 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
103 &test_rtc_ops, THIS_MODULE);
104 if (IS_ERR(rtc)) {
105 err = PTR_ERR(rtc);
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800106 return err;
107 }
Jeff Garzik91046a82006-12-06 20:35:34 -0800108
109 err = device_create_file(&plat_dev->dev, &dev_attr_irq);
110 if (err)
111 goto err;
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800112
113 platform_set_drvdata(plat_dev, rtc);
114
115 return 0;
Jeff Garzik91046a82006-12-06 20:35:34 -0800116
117err:
118 rtc_device_unregister(rtc);
119 return err;
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800120}
121
Greg Kroah-Hartman5a167f42012-12-21 13:09:38 -0800122static int test_remove(struct platform_device *plat_dev)
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800123{
124 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
125
126 rtc_device_unregister(rtc);
127 device_remove_file(&plat_dev->dev, &dev_attr_irq);
128
129 return 0;
130}
131
Sam Ravnborgc4646522008-04-28 02:11:55 -0700132static struct platform_driver test_driver = {
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800133 .probe = test_probe,
Greg Kroah-Hartman5a167f42012-12-21 13:09:38 -0800134 .remove = test_remove,
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800135 .driver = {
136 .name = "rtc-test",
137 .owner = THIS_MODULE,
138 },
139};
140
141static int __init test_init(void)
142{
143 int err;
144
Sam Ravnborgc4646522008-04-28 02:11:55 -0700145 if ((err = platform_driver_register(&test_driver)))
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800146 return err;
147
148 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
149 err = -ENOMEM;
150 goto exit_driver_unregister;
151 }
152
153 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
154 err = -ENOMEM;
Wei Yongjun942bfb32012-12-17 16:02:27 -0800155 goto exit_put_test0;
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800156 }
157
158 if ((err = platform_device_add(test0)))
Wei Yongjun942bfb32012-12-17 16:02:27 -0800159 goto exit_put_test1;
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800160
161 if ((err = platform_device_add(test1)))
Wei Yongjun942bfb32012-12-17 16:02:27 -0800162 goto exit_del_test0;
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800163
164 return 0;
165
Wei Yongjun942bfb32012-12-17 16:02:27 -0800166exit_del_test0:
167 platform_device_del(test0);
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800168
Wei Yongjun942bfb32012-12-17 16:02:27 -0800169exit_put_test1:
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800170 platform_device_put(test1);
171
Wei Yongjun942bfb32012-12-17 16:02:27 -0800172exit_put_test0:
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800173 platform_device_put(test0);
174
175exit_driver_unregister:
Sam Ravnborgc4646522008-04-28 02:11:55 -0700176 platform_driver_unregister(&test_driver);
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800177 return err;
178}
179
180static void __exit test_exit(void)
181{
182 platform_device_unregister(test0);
183 platform_device_unregister(test1);
Sam Ravnborgc4646522008-04-28 02:11:55 -0700184 platform_driver_unregister(&test_driver);
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800185}
186
187MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
188MODULE_DESCRIPTION("RTC test driver/device");
189MODULE_LICENSE("GPL");
190
191module_init(test_init);
192module_exit(test_exit);