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a95579cd AZ |
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 | ||
a95579cd AZ |
37 | static int test_rtc_set_mmss(struct device *dev, unsigned long secs) |
38 | { | |
bbccf83f | 39 | dev_info(dev, "%s, secs = %lu\n", __func__, secs); |
a95579cd AZ |
40 | return 0; |
41 | } | |
42 | ||
43 | static int test_rtc_proc(struct device *dev, struct seq_file *seq) | |
44 | { | |
45 | struct platform_device *plat_dev = to_platform_device(dev); | |
46 | ||
a95579cd AZ |
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 | ||
53 | static 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: | |
b3969e58 | 69 | return -ENOIOCTLCMD; |
a95579cd AZ |
70 | } |
71 | } | |
72 | ||
ff8371ac | 73 | static const struct rtc_class_ops test_rtc_ops = { |
a95579cd AZ |
74 | .proc = test_rtc_proc, |
75 | .read_time = test_rtc_read_time, | |
a95579cd AZ |
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 | ||
82 | static ssize_t test_irq_show(struct device *dev, | |
83 | struct device_attribute *attr, char *buf) | |
84 | { | |
85 | return sprintf(buf, "%d\n", 42); | |
86 | } | |
87 | static 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 | if (strncmp(buf, "tick", 4) == 0) | |
ab6a2d70 | 97 | rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF); |
a95579cd | 98 | else if (strncmp(buf, "alarm", 5) == 0) |
ab6a2d70 | 99 | rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); |
a95579cd | 100 | else if (strncmp(buf, "update", 6) == 0) |
ab6a2d70 | 101 | rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF); |
a95579cd AZ |
102 | else |
103 | retval = -EINVAL; | |
104 | ||
105 | return retval; | |
106 | } | |
107 | static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); | |
108 | ||
109 | static int test_probe(struct platform_device *plat_dev) | |
110 | { | |
111 | int err; | |
112 | struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev, | |
113 | &test_rtc_ops, THIS_MODULE); | |
114 | if (IS_ERR(rtc)) { | |
115 | err = PTR_ERR(rtc); | |
a95579cd AZ |
116 | return err; |
117 | } | |
91046a8a JG |
118 | |
119 | err = device_create_file(&plat_dev->dev, &dev_attr_irq); | |
120 | if (err) | |
121 | goto err; | |
a95579cd AZ |
122 | |
123 | platform_set_drvdata(plat_dev, rtc); | |
124 | ||
125 | return 0; | |
91046a8a JG |
126 | |
127 | err: | |
128 | rtc_device_unregister(rtc); | |
129 | return err; | |
a95579cd AZ |
130 | } |
131 | ||
132 | static int __devexit test_remove(struct platform_device *plat_dev) | |
133 | { | |
134 | struct rtc_device *rtc = platform_get_drvdata(plat_dev); | |
135 | ||
136 | rtc_device_unregister(rtc); | |
137 | device_remove_file(&plat_dev->dev, &dev_attr_irq); | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
c4646528 | 142 | static struct platform_driver test_driver = { |
a95579cd AZ |
143 | .probe = test_probe, |
144 | .remove = __devexit_p(test_remove), | |
145 | .driver = { | |
146 | .name = "rtc-test", | |
147 | .owner = THIS_MODULE, | |
148 | }, | |
149 | }; | |
150 | ||
151 | static int __init test_init(void) | |
152 | { | |
153 | int err; | |
154 | ||
c4646528 | 155 | if ((err = platform_driver_register(&test_driver))) |
a95579cd AZ |
156 | return err; |
157 | ||
158 | if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) { | |
159 | err = -ENOMEM; | |
160 | goto exit_driver_unregister; | |
161 | } | |
162 | ||
163 | if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) { | |
164 | err = -ENOMEM; | |
165 | goto exit_free_test0; | |
166 | } | |
167 | ||
168 | if ((err = platform_device_add(test0))) | |
169 | goto exit_free_test1; | |
170 | ||
171 | if ((err = platform_device_add(test1))) | |
172 | goto exit_device_unregister; | |
173 | ||
174 | return 0; | |
175 | ||
176 | exit_device_unregister: | |
177 | platform_device_unregister(test0); | |
178 | ||
179 | exit_free_test1: | |
180 | platform_device_put(test1); | |
181 | ||
182 | exit_free_test0: | |
183 | platform_device_put(test0); | |
184 | ||
185 | exit_driver_unregister: | |
c4646528 | 186 | platform_driver_unregister(&test_driver); |
a95579cd AZ |
187 | return err; |
188 | } | |
189 | ||
190 | static void __exit test_exit(void) | |
191 | { | |
192 | platform_device_unregister(test0); | |
193 | platform_device_unregister(test1); | |
c4646528 | 194 | platform_driver_unregister(&test_driver); |
a95579cd AZ |
195 | } |
196 | ||
197 | MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); | |
198 | MODULE_DESCRIPTION("RTC test driver/device"); | |
199 | MODULE_LICENSE("GPL"); | |
200 | ||
201 | module_init(test_init); | |
202 | module_exit(test_exit); |