2 * An RTC test device/driver
3 * Copyright (C) 2005 Tower Technologies
4 * Author: Alessandro Zummo <a.zummo@towertech.it>
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.
11 #include <linux/module.h>
12 #include <linux/err.h>
13 #include <linux/rtc.h>
14 #include <linux/platform_device.h>
16 static struct platform_device *test0 = NULL, *test1 = NULL;
18 static int test_rtc_read_alarm(struct device *dev,
19 struct rtc_wkalrm *alrm)
24 static int test_rtc_set_alarm(struct device *dev,
25 struct rtc_wkalrm *alrm)
30 static int test_rtc_read_time(struct device *dev,
33 rtc_time_to_tm(get_seconds(), tm);
37 static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
39 dev_info(dev, "%s, secs = %lu\n", __func__, secs);
43 static int test_rtc_proc(struct device *dev, struct seq_file *seq)
45 struct platform_device *plat_dev = to_platform_device(dev);
47 seq_printf(seq, "test\t\t: yes\n");
48 seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
53 static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
56 /* We do support interrupts, they're generated
57 * using the sysfs interface.
73 static 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,
82 static ssize_t test_irq_show(struct device *dev,
83 struct device_attribute *attr, char *buf)
85 return sprintf(buf, "%d\n", 42);
87 static ssize_t test_irq_store(struct device *dev,
88 struct device_attribute *attr,
89 const char *buf, size_t count)
92 struct platform_device *plat_dev = to_platform_device(dev);
93 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
96 if (strncmp(buf, "tick", 4) == 0)
97 rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
98 else if (strncmp(buf, "alarm", 5) == 0)
99 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
100 else if (strncmp(buf, "update", 6) == 0)
101 rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
107 static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
109 static int test_probe(struct platform_device *plat_dev)
112 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
113 &test_rtc_ops, THIS_MODULE);
119 err = device_create_file(&plat_dev->dev, &dev_attr_irq);
123 platform_set_drvdata(plat_dev, rtc);
128 rtc_device_unregister(rtc);
132 static int __devexit test_remove(struct platform_device *plat_dev)
134 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
136 rtc_device_unregister(rtc);
137 device_remove_file(&plat_dev->dev, &dev_attr_irq);
142 static struct platform_driver test_driver = {
144 .remove = __devexit_p(test_remove),
147 .owner = THIS_MODULE,
151 static int __init test_init(void)
155 if ((err = platform_driver_register(&test_driver)))
158 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
160 goto exit_driver_unregister;
163 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
165 goto exit_free_test0;
168 if ((err = platform_device_add(test0)))
169 goto exit_free_test1;
171 if ((err = platform_device_add(test1)))
172 goto exit_device_unregister;
176 exit_device_unregister:
177 platform_device_unregister(test0);
180 platform_device_put(test1);
183 platform_device_put(test0);
185 exit_driver_unregister:
186 platform_driver_unregister(&test_driver);
190 static void __exit test_exit(void)
192 platform_device_unregister(test0);
193 platform_device_unregister(test1);
194 platform_driver_unregister(&test_driver);
197 MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
198 MODULE_DESCRIPTION("RTC test driver/device");
199 MODULE_LICENSE("GPL");
201 module_init(test_init);
202 module_exit(test_exit);