1// SPDX-License-Identifier: GPL-2.0-only
 2/* rtc-generic: RTC driver using the generic RTC abstraction
 3 *
 4 * Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
 5 */
 6
 7#include <linux/kernel.h>
 8#include <linux/module.h>
 9#include <linux/time.h>
10#include <linux/platform_device.h>
11#include <linux/rtc.h>
12
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13static int __init generic_rtc_probe(struct platform_device *dev)
14{
15	struct rtc_device *rtc;
16	const struct rtc_class_ops *ops = dev_get_platdata(&dev->dev);
 
 
 
 
17
18	rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
19					ops, THIS_MODULE);
20	if (IS_ERR(rtc))
21		return PTR_ERR(rtc);
22
23	platform_set_drvdata(dev, rtc);
24
25	return 0;
26}
27
28static struct platform_driver generic_rtc_driver = {
29	.driver = {
30		.name = "rtc-generic",
31	},
32};
33
34module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
35
36MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
37MODULE_LICENSE("GPL");
38MODULE_DESCRIPTION("Generic RTC driver");
39MODULE_ALIAS("platform:rtc-generic");

 
 1/* rtc-generic: RTC driver using the generic RTC abstraction
 2 *
 3 * Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
 4 */
 5
 6#include <linux/kernel.h>
 7#include <linux/module.h>
 8#include <linux/time.h>
 9#include <linux/platform_device.h>
10#include <linux/rtc.h>
11
12#if defined(CONFIG_M68K) || defined(CONFIG_PARISC) || \
13    defined(CONFIG_PPC) || defined(CONFIG_SUPERH32)
14#include <asm/rtc.h>
15
16static int generic_get_time(struct device *dev, struct rtc_time *tm)
17{
18	unsigned int ret = get_rtc_time(tm);
19
20	if (ret & RTC_BATT_BAD)
21		return -EOPNOTSUPP;
22
23	return rtc_valid_tm(tm);
24}
25
26static int generic_set_time(struct device *dev, struct rtc_time *tm)
27{
28	if (set_rtc_time(tm) < 0)
29		return -EOPNOTSUPP;
30
31	return 0;
32}
33
34static const struct rtc_class_ops generic_rtc_ops = {
35	.read_time = generic_get_time,
36	.set_time = generic_set_time,
37};
38#else
39#define generic_rtc_ops *(struct rtc_class_ops*)NULL
40#endif
41
42static int __init generic_rtc_probe(struct platform_device *dev)
43{
44	struct rtc_device *rtc;
45	const struct rtc_class_ops *ops;
46
47	ops = dev_get_platdata(&dev->dev);
48	if (!ops)
49		ops = &generic_rtc_ops;
50
51	rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
52					ops, THIS_MODULE);
53	if (IS_ERR(rtc))
54		return PTR_ERR(rtc);
55
56	platform_set_drvdata(dev, rtc);
57
58	return 0;
59}
60
61static struct platform_driver generic_rtc_driver = {
62	.driver = {
63		.name = "rtc-generic",
64	},
65};
66
67module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
68
69MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
70MODULE_LICENSE("GPL");
71MODULE_DESCRIPTION("Generic RTC driver");
72MODULE_ALIAS("platform:rtc-generic");