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11#include <linux/module.h>
12#include <linux/err.h>
13#include <linux/rtc.h>
14#include <linux/platform_device.h>
15
16static int test_mmss64;
17module_param(test_mmss64, int, 0644);
18MODULE_PARM_DESC(test_mmss64, "Test struct rtc_class_ops.set_mmss64().");
19
20static struct platform_device *test0 = NULL, *test1 = NULL;
21
22static int test_rtc_read_alarm(struct device *dev,
23 struct rtc_wkalrm *alrm)
24{
25 return 0;
26}
27
28static int test_rtc_set_alarm(struct device *dev,
29 struct rtc_wkalrm *alrm)
30{
31 return 0;
32}
33
34static int test_rtc_read_time(struct device *dev,
35 struct rtc_time *tm)
36{
37 rtc_time64_to_tm(ktime_get_real_seconds(), tm);
38 return 0;
39}
40
41static int test_rtc_set_mmss64(struct device *dev, time64_t secs)
42{
43 dev_info(dev, "%s, secs = %lld\n", __func__, (long long)secs);
44 return 0;
45}
46
47static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
48{
49 dev_info(dev, "%s, secs = %lu\n", __func__, secs);
50 return 0;
51}
52
53static int test_rtc_proc(struct device *dev, struct seq_file *seq)
54{
55 struct platform_device *plat_dev = to_platform_device(dev);
56
57 seq_printf(seq, "test\t\t: yes\n");
58 seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
59
60 return 0;
61}
62
63static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
64{
65 return 0;
66}
67
68static struct rtc_class_ops test_rtc_ops = {
69 .proc = test_rtc_proc,
70 .read_time = test_rtc_read_time,
71 .read_alarm = test_rtc_read_alarm,
72 .set_alarm = test_rtc_set_alarm,
73 .set_mmss = test_rtc_set_mmss,
74 .alarm_irq_enable = test_rtc_alarm_irq_enable,
75};
76
77static ssize_t test_irq_show(struct device *dev,
78 struct device_attribute *attr, char *buf)
79{
80 return sprintf(buf, "%d\n", 42);
81}
82static ssize_t test_irq_store(struct device *dev,
83 struct device_attribute *attr,
84 const char *buf, size_t count)
85{
86 int retval;
87 struct platform_device *plat_dev = to_platform_device(dev);
88 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
89
90 retval = count;
91 if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled)
92 rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
93 else if (strncmp(buf, "alarm", 5) == 0) {
94 struct rtc_wkalrm alrm;
95 int err = rtc_read_alarm(rtc, &alrm);
96
97 if (!err && alrm.enabled)
98 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
99
100 } else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled)
101 rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
102 else
103 retval = -EINVAL;
104
105 return retval;
106}
107static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
108
109static int test_probe(struct platform_device *plat_dev)
110{
111 int err;
112 struct rtc_device *rtc;
113
114 if (test_mmss64) {
115 test_rtc_ops.set_mmss64 = test_rtc_set_mmss64;
116 test_rtc_ops.set_mmss = NULL;
117 }
118
119 rtc = devm_rtc_device_register(&plat_dev->dev, "test",
120 &test_rtc_ops, THIS_MODULE);
121 if (IS_ERR(rtc)) {
122 return PTR_ERR(rtc);
123 }
124
125 err = device_create_file(&plat_dev->dev, &dev_attr_irq);
126 if (err)
127 dev_err(&plat_dev->dev, "Unable to create sysfs entry: %s\n",
128 dev_attr_irq.attr.name);
129
130 platform_set_drvdata(plat_dev, rtc);
131
132 return 0;
133}
134
135static int test_remove(struct platform_device *plat_dev)
136{
137 device_remove_file(&plat_dev->dev, &dev_attr_irq);
138
139 return 0;
140}
141
142static struct platform_driver test_driver = {
143 .probe = test_probe,
144 .remove = test_remove,
145 .driver = {
146 .name = "rtc-test",
147 },
148};
149
150static int __init test_init(void)
151{
152 int err;
153
154 if ((err = platform_driver_register(&test_driver)))
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_put_test0;
165 }
166
167 if ((err = platform_device_add(test0)))
168 goto exit_put_test1;
169
170 if ((err = platform_device_add(test1)))
171 goto exit_del_test0;
172
173 return 0;
174
175exit_del_test0:
176 platform_device_del(test0);
177
178exit_put_test1:
179 platform_device_put(test1);
180
181exit_put_test0:
182 platform_device_put(test0);
183
184exit_driver_unregister:
185 platform_driver_unregister(&test_driver);
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_driver);
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);
202
