blob: e1fa5fe7901f900167b448997cb4f4373a85e892 [file] [log] [blame]
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
37static int test_rtc_set_time(struct device *dev,
38 struct rtc_time *tm)
39{
40 return 0;
41}
42
43static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
44{
45 return 0;
46}
47
48static int test_rtc_proc(struct device *dev, struct seq_file *seq)
49{
50 struct platform_device *plat_dev = to_platform_device(dev);
51
Alessandro Zummoa95579c2006-03-27 01:16:42 -080052 seq_printf(seq, "test\t\t: yes\n");
53 seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
54
55 return 0;
56}
57
58static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
59 unsigned long arg)
60{
61 /* We do support interrupts, they're generated
62 * using the sysfs interface.
63 */
64 switch (cmd) {
65 case RTC_PIE_ON:
66 case RTC_PIE_OFF:
67 case RTC_UIE_ON:
68 case RTC_UIE_OFF:
69 case RTC_AIE_ON:
70 case RTC_AIE_OFF:
71 return 0;
72
73 default:
Alessandro Zummob3969e52006-05-20 15:00:29 -070074 return -ENOIOCTLCMD;
Alessandro Zummoa95579c2006-03-27 01:16:42 -080075 }
76}
77
78static struct rtc_class_ops test_rtc_ops = {
79 .proc = test_rtc_proc,
80 .read_time = test_rtc_read_time,
81 .set_time = test_rtc_set_time,
82 .read_alarm = test_rtc_read_alarm,
83 .set_alarm = test_rtc_set_alarm,
84 .set_mmss = test_rtc_set_mmss,
85 .ioctl = test_rtc_ioctl,
86};
87
88static ssize_t test_irq_show(struct device *dev,
89 struct device_attribute *attr, char *buf)
90{
91 return sprintf(buf, "%d\n", 42);
92}
93static ssize_t test_irq_store(struct device *dev,
94 struct device_attribute *attr,
95 const char *buf, size_t count)
96{
97 int retval;
98 struct platform_device *plat_dev = to_platform_device(dev);
99 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
100
101 retval = count;
102 if (strncmp(buf, "tick", 4) == 0)
103 rtc_update_irq(&rtc->class_dev, 1, RTC_PF | RTC_IRQF);
104 else if (strncmp(buf, "alarm", 5) == 0)
105 rtc_update_irq(&rtc->class_dev, 1, RTC_AF | RTC_IRQF);
106 else if (strncmp(buf, "update", 6) == 0)
107 rtc_update_irq(&rtc->class_dev, 1, RTC_UF | RTC_IRQF);
108 else
109 retval = -EINVAL;
110
111 return retval;
112}
113static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
114
115static int test_probe(struct platform_device *plat_dev)
116{
117 int err;
118 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
119 &test_rtc_ops, THIS_MODULE);
120 if (IS_ERR(rtc)) {
121 err = PTR_ERR(rtc);
Alessandro Zummoa95579c2006-03-27 01:16:42 -0800122 return err;
123 }
124 device_create_file(&plat_dev->dev, &dev_attr_irq);
125
126 platform_set_drvdata(plat_dev, rtc);
127
128 return 0;
129}
130
131static int __devexit test_remove(struct platform_device *plat_dev)
132{
133 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
134
135 rtc_device_unregister(rtc);
136 device_remove_file(&plat_dev->dev, &dev_attr_irq);
137
138 return 0;
139}
140
141static struct platform_driver test_drv = {
142 .probe = test_probe,
143 .remove = __devexit_p(test_remove),
144 .driver = {
145 .name = "rtc-test",
146 .owner = THIS_MODULE,
147 },
148};
149
150static int __init test_init(void)
151{
152 int err;
153
154 if ((err = platform_driver_register(&test_drv)))
155 return err;
156
157 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
158 err = -ENOMEM;
159 goto exit_driver_unregister;
160 }
161
162 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
163 err = -ENOMEM;
164 goto exit_free_test0;
165 }
166
167 if ((err = platform_device_add(test0)))
168 goto exit_free_test1;
169
170 if ((err = platform_device_add(test1)))
171 goto exit_device_unregister;
172
173 return 0;
174
175exit_device_unregister:
176 platform_device_unregister(test0);
177
178exit_free_test1:
179 platform_device_put(test1);
180
181exit_free_test0:
182 platform_device_put(test0);
183
184exit_driver_unregister:
185 platform_driver_unregister(&test_drv);
186 return err;
187}
188
189static void __exit test_exit(void)
190{
191 platform_device_unregister(test0);
192 platform_device_unregister(test1);
193 platform_driver_unregister(&test_drv);
194}
195
196MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
197MODULE_DESCRIPTION("RTC test driver/device");
198MODULE_LICENSE("GPL");
199
200module_init(test_init);
201module_exit(test_exit);