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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 | ||
16 | static struct platform_device *test0 = NULL, *test1 = NULL; | |
17 | ||
18 | static int test_rtc_read_alarm(struct device *dev, | |
19 | struct rtc_wkalrm *alrm) | |
20 | { | |
21 | return 0; | |
22 | } | |
23 | ||
24 | static int test_rtc_set_alarm(struct device *dev, | |
25 | struct rtc_wkalrm *alrm) | |
26 | { | |
27 | return 0; | |
28 | } | |
29 | ||
30 | static 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 | ||
37 | static int test_rtc_set_time(struct device *dev, | |
38 | struct rtc_time *tm) | |
39 | { | |
40 | return 0; | |
41 | } | |
42 | ||
43 | static int test_rtc_set_mmss(struct device *dev, unsigned long secs) | |
44 | { | |
45 | return 0; | |
46 | } | |
47 | ||
48 | static int test_rtc_proc(struct device *dev, struct seq_file *seq) | |
49 | { | |
50 | struct platform_device *plat_dev = to_platform_device(dev); | |
51 | ||
52 | seq_printf(seq, "24hr\t\t: yes\n"); | |
53 | seq_printf(seq, "test\t\t: yes\n"); | |
54 | seq_printf(seq, "id\t\t: %d\n", plat_dev->id); | |
55 | ||
56 | return 0; | |
57 | } | |
58 | ||
59 | static int test_rtc_ioctl(struct device *dev, unsigned int cmd, | |
60 | unsigned long arg) | |
61 | { | |
62 | /* We do support interrupts, they're generated | |
63 | * using the sysfs interface. | |
64 | */ | |
65 | switch (cmd) { | |
66 | case RTC_PIE_ON: | |
67 | case RTC_PIE_OFF: | |
68 | case RTC_UIE_ON: | |
69 | case RTC_UIE_OFF: | |
70 | case RTC_AIE_ON: | |
71 | case RTC_AIE_OFF: | |
72 | return 0; | |
73 | ||
74 | default: | |
75 | return -EINVAL; | |
76 | } | |
77 | } | |
78 | ||
79 | static struct rtc_class_ops test_rtc_ops = { | |
80 | .proc = test_rtc_proc, | |
81 | .read_time = test_rtc_read_time, | |
82 | .set_time = test_rtc_set_time, | |
83 | .read_alarm = test_rtc_read_alarm, | |
84 | .set_alarm = test_rtc_set_alarm, | |
85 | .set_mmss = test_rtc_set_mmss, | |
86 | .ioctl = test_rtc_ioctl, | |
87 | }; | |
88 | ||
89 | static ssize_t test_irq_show(struct device *dev, | |
90 | struct device_attribute *attr, char *buf) | |
91 | { | |
92 | return sprintf(buf, "%d\n", 42); | |
93 | } | |
94 | static ssize_t test_irq_store(struct device *dev, | |
95 | struct device_attribute *attr, | |
96 | const char *buf, size_t count) | |
97 | { | |
98 | int retval; | |
99 | struct platform_device *plat_dev = to_platform_device(dev); | |
100 | struct rtc_device *rtc = platform_get_drvdata(plat_dev); | |
101 | ||
102 | retval = count; | |
103 | if (strncmp(buf, "tick", 4) == 0) | |
104 | rtc_update_irq(&rtc->class_dev, 1, RTC_PF | RTC_IRQF); | |
105 | else if (strncmp(buf, "alarm", 5) == 0) | |
106 | rtc_update_irq(&rtc->class_dev, 1, RTC_AF | RTC_IRQF); | |
107 | else if (strncmp(buf, "update", 6) == 0) | |
108 | rtc_update_irq(&rtc->class_dev, 1, RTC_UF | RTC_IRQF); | |
109 | else | |
110 | retval = -EINVAL; | |
111 | ||
112 | return retval; | |
113 | } | |
114 | static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); | |
115 | ||
116 | static int test_probe(struct platform_device *plat_dev) | |
117 | { | |
118 | int err; | |
119 | struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev, | |
120 | &test_rtc_ops, THIS_MODULE); | |
121 | if (IS_ERR(rtc)) { | |
122 | err = PTR_ERR(rtc); | |
123 | dev_err(&plat_dev->dev, | |
124 | "unable to register the class device\n"); | |
125 | return err; | |
126 | } | |
127 | device_create_file(&plat_dev->dev, &dev_attr_irq); | |
128 | ||
129 | platform_set_drvdata(plat_dev, rtc); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static 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 | ||
144 | static struct platform_driver test_drv = { | |
145 | .probe = test_probe, | |
146 | .remove = __devexit_p(test_remove), | |
147 | .driver = { | |
148 | .name = "rtc-test", | |
149 | .owner = THIS_MODULE, | |
150 | }, | |
151 | }; | |
152 | ||
153 | static int __init test_init(void) | |
154 | { | |
155 | int err; | |
156 | ||
157 | if ((err = platform_driver_register(&test_drv))) | |
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 | ||
178 | exit_device_unregister: | |
179 | platform_device_unregister(test0); | |
180 | ||
181 | exit_free_test1: | |
182 | platform_device_put(test1); | |
183 | ||
184 | exit_free_test0: | |
185 | platform_device_put(test0); | |
186 | ||
187 | exit_driver_unregister: | |
188 | platform_driver_unregister(&test_drv); | |
189 | return err; | |
190 | } | |
191 | ||
192 | static void __exit test_exit(void) | |
193 | { | |
194 | platform_device_unregister(test0); | |
195 | platform_device_unregister(test1); | |
196 | platform_driver_unregister(&test_drv); | |
197 | } | |
198 | ||
199 | MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); | |
200 | MODULE_DESCRIPTION("RTC test driver/device"); | |
201 | MODULE_LICENSE("GPL"); | |
202 | ||
203 | module_init(test_init); | |
204 | module_exit(test_exit); |