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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_mmss(struct device *dev, unsigned long secs) |
38 | { |
39 | dev_info(dev, "%s, secs = %lu\n", __func__, secs); |
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 | |
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_alarm_irq_enable(struct device *dev, unsigned int enable) |
54 | { |
55 | return 0; |
56 | } |
57 | |
58 | static const struct rtc_class_ops test_rtc_ops = { |
59 | .proc = test_rtc_proc, |
60 | .read_time = test_rtc_read_time, |
61 | .read_alarm = test_rtc_read_alarm, |
62 | .set_alarm = test_rtc_set_alarm, |
63 | .set_mmss = test_rtc_set_mmss, |
64 | .alarm_irq_enable = test_rtc_alarm_irq_enable, |
65 | }; |
66 | |
67 | static ssize_t test_irq_show(struct device *dev, |
68 | struct device_attribute *attr, char *buf) |
69 | { |
70 | return sprintf(buf, "%d\n", 42); |
71 | } |
72 | static 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; |
81 | if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled) |
82 | rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF); |
83 | 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) |
91 | rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF); |
92 | else |
93 | retval = -EINVAL; |
94 | |
95 | return retval; |
96 | } |
97 | static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); |
98 | |
99 | static 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); |
106 | return err; |
107 | } |
108 | |
109 | err = device_create_file(&plat_dev->dev, &dev_attr_irq); |
110 | if (err) |
111 | goto err; |
112 | |
113 | platform_set_drvdata(plat_dev, rtc); |
114 | |
115 | return 0; |
116 | |
117 | err: |
118 | rtc_device_unregister(rtc); |
119 | return err; |
120 | } |
121 | |
122 | static int test_remove(struct platform_device *plat_dev) |
123 | { |
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 | |
132 | static struct platform_driver test_driver = { |
133 | .probe = test_probe, |
134 | .remove = test_remove, |
135 | .driver = { |
136 | .name = "rtc-test", |
137 | .owner = THIS_MODULE, |
138 | }, |
139 | }; |
140 | |
141 | static int __init test_init(void) |
142 | { |
143 | int err; |
144 | |
145 | if ((err = platform_driver_register(&test_driver))) |
146 | 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; |
155 | goto exit_put_test0; |
156 | } |
157 | |
158 | if ((err = platform_device_add(test0))) |
159 | goto exit_put_test1; |
160 | |
161 | if ((err = platform_device_add(test1))) |
162 | goto exit_del_test0; |
163 | |
164 | return 0; |
165 | |
166 | exit_del_test0: |
167 | platform_device_del(test0); |
168 | |
169 | exit_put_test1: |
170 | platform_device_put(test1); |
171 | |
172 | exit_put_test0: |
173 | platform_device_put(test0); |
174 | |
175 | exit_driver_unregister: |
176 | platform_driver_unregister(&test_driver); |
177 | return err; |
178 | } |
179 | |
180 | static void __exit test_exit(void) |
181 | { |
182 | platform_device_unregister(test0); |
183 | platform_device_unregister(test1); |
184 | platform_driver_unregister(&test_driver); |
185 | } |
186 | |
187 | MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); |
188 | MODULE_DESCRIPTION("RTC test driver/device"); |
189 | MODULE_LICENSE("GPL"); |
190 | |
191 | module_init(test_init); |
192 | module_exit(test_exit); |
193 |
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