Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
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_mmss(struct device *dev, unsigned long secs)
38{
39 dev_info(dev, "%s, secs = %lu\n", __func__, secs);
40 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
47 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
53static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
54 unsigned long arg)
55{
56 /* We do support interrupts, they're generated
57 * using the sysfs interface.
58 */
59 switch (cmd) {
60 case RTC_PIE_ON:
61 case RTC_PIE_OFF:
62 case RTC_UIE_ON:
63 case RTC_UIE_OFF:
64 case RTC_AIE_ON:
65 case RTC_AIE_OFF:
66 return 0;
67
68 default:
69 return -ENOIOCTLCMD;
70 }
71}
72
73static const struct rtc_class_ops test_rtc_ops = {
74 .proc = test_rtc_proc,
75 .read_time = test_rtc_read_time,
76 .read_alarm = test_rtc_read_alarm,
77 .set_alarm = test_rtc_set_alarm,
78 .set_mmss = test_rtc_set_mmss,
79 .ioctl = test_rtc_ioctl,
80};
81
82static ssize_t test_irq_show(struct device *dev,
83 struct device_attribute *attr, char *buf)
84{
85 return sprintf(buf, "%d\n", 42);
86}
87static ssize_t test_irq_store(struct device *dev,
88 struct device_attribute *attr,
89 const char *buf, size_t count)
90{
91 int retval;
92 struct platform_device *plat_dev = to_platform_device(dev);
93 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
94
95 retval = count;
96 local_irq_disable();
97 if (strncmp(buf, "tick", 4) == 0)
98 rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
99 else if (strncmp(buf, "alarm", 5) == 0)
100 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
101 else if (strncmp(buf, "update", 6) == 0)
102 rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
103 else
104 retval = -EINVAL;
105 local_irq_enable();
106
107 return retval;
108}
109static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
110
111static int test_probe(struct platform_device *plat_dev)
112{
113 int err;
114 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
115 &test_rtc_ops, THIS_MODULE);
116 if (IS_ERR(rtc)) {
117 err = PTR_ERR(rtc);
118 return err;
119 }
120
121 err = device_create_file(&plat_dev->dev, &dev_attr_irq);
122 if (err)
123 goto err;
124
125 platform_set_drvdata(plat_dev, rtc);
126
127 return 0;
128
129err:
130 rtc_device_unregister(rtc);
131 return err;
132}
133
134static int __devexit test_remove(struct platform_device *plat_dev)
135{
136 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
137
138 rtc_device_unregister(rtc);
139 device_remove_file(&plat_dev->dev, &dev_attr_irq);
140
141 return 0;
142}
143
144static struct platform_driver test_driver = {
145 .probe = test_probe,
146 .remove = __devexit_p(test_remove),
147 .driver = {
148 .name = "rtc-test",
149 .owner = THIS_MODULE,
150 },
151};
152
153static int __init test_init(void)
154{
155 int err;
156
157 if ((err = platform_driver_register(&test_driver)))
158 return err;
159
160 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
161 err = -ENOMEM;
162 goto exit_driver_unregister;
163 }
164
165 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
166 err = -ENOMEM;
167 goto exit_free_test0;
168 }
169
170 if ((err = platform_device_add(test0)))
171 goto exit_free_test1;
172
173 if ((err = platform_device_add(test1)))
174 goto exit_device_unregister;
175
176 return 0;
177
178exit_device_unregister:
179 platform_device_unregister(test0);
180
181exit_free_test1:
182 platform_device_put(test1);
183
184exit_free_test0:
185 platform_device_put(test0);
186
187exit_driver_unregister:
188 platform_driver_unregister(&test_driver);
189 return err;
190}
191
192static void __exit test_exit(void)
193{
194 platform_device_unregister(test0);
195 platform_device_unregister(test1);
196 platform_driver_unregister(&test_driver);
197}
198
199MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
200MODULE_DESCRIPTION("RTC test driver/device");
201MODULE_LICENSE("GPL");
202
203module_init(test_init);
204module_exit(test_exit);