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_time(struct device *dev,
43 static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
48 static int test_rtc_proc(struct device *dev, struct seq_file *seq)
50 struct platform_device *plat_dev = to_platform_device(dev);
52 seq_printf(seq, "test\t\t: yes\n");
53 seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
58 static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
61 /* We do support interrupts, they're generated
62 * using the sysfs interface.
78 static const struct rtc_class_ops test_rtc_ops = {
79 .proc = test_rtc_proc,
80 .read_time = test_rtc_read_time,
81 .set_time = test_rtc_set_time,
82 .read_alarm = test_rtc_read_alarm,
83 .set_alarm = test_rtc_set_alarm,
84 .set_mmss = test_rtc_set_mmss,
85 .ioctl = test_rtc_ioctl,
88 static ssize_t test_irq_show(struct device *dev,
89 struct device_attribute *attr, char *buf)
91 return sprintf(buf, "%d\n", 42);
93 static ssize_t test_irq_store(struct device *dev,
94 struct device_attribute *attr,
95 const char *buf, size_t count)
98 struct platform_device *plat_dev = to_platform_device(dev);
99 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
103 if (strncmp(buf, "tick", 4) == 0)
104 rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
105 else if (strncmp(buf, "alarm", 5) == 0)
106 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
107 else if (strncmp(buf, "update", 6) == 0)
108 rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
115 static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
117 static int test_probe(struct platform_device *plat_dev)
120 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
121 &test_rtc_ops, THIS_MODULE);
127 err = device_create_file(&plat_dev->dev, &dev_attr_irq);
131 platform_set_drvdata(plat_dev, rtc);
136 rtc_device_unregister(rtc);
140 static int __devexit test_remove(struct platform_device *plat_dev)
142 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
144 rtc_device_unregister(rtc);
145 device_remove_file(&plat_dev->dev, &dev_attr_irq);
150 static struct platform_driver test_driver = {
152 .remove = __devexit_p(test_remove),
155 .owner = THIS_MODULE,
159 static int __init test_init(void)
163 if ((err = platform_driver_register(&test_driver)))
166 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
168 goto exit_driver_unregister;
171 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
173 goto exit_free_test0;
176 if ((err = platform_device_add(test0)))
177 goto exit_free_test1;
179 if ((err = platform_device_add(test1)))
180 goto exit_device_unregister;
184 exit_device_unregister:
185 platform_device_unregister(test0);
188 platform_device_put(test1);
191 platform_device_put(test0);
193 exit_driver_unregister:
194 platform_driver_unregister(&test_driver);
198 static void __exit test_exit(void)
200 platform_device_unregister(test0);
201 platform_device_unregister(test1);
202 platform_driver_unregister(&test_driver);
205 MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
206 MODULE_DESCRIPTION("RTC test driver/device");
207 MODULE_LICENSE("GPL");
209 module_init(test_init);
210 module_exit(test_exit);