1 /* rtc-parisc: RTC for HP PA-RISC firmware
3 * Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
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>
14 /* as simple as can be, and no simpler. */
16 struct rtc_device *rtc;
20 static int parisc_get_time(struct device *dev, struct rtc_time *tm)
22 struct parisc_rtc *p = dev_get_drvdata(dev);
23 unsigned long flags, ret;
25 spin_lock_irqsave(&p->lock, flags);
26 ret = get_rtc_time(tm);
27 spin_unlock_irqrestore(&p->lock, flags);
29 if (ret & RTC_BATT_BAD)
35 static int parisc_set_time(struct device *dev, struct rtc_time *tm)
37 struct parisc_rtc *p = dev_get_drvdata(dev);
41 spin_lock_irqsave(&p->lock, flags);
42 ret = set_rtc_time(tm);
43 spin_unlock_irqrestore(&p->lock, flags);
51 static const struct rtc_class_ops parisc_rtc_ops = {
52 .read_time = parisc_get_time,
53 .set_time = parisc_set_time,
56 static int __devinit parisc_rtc_probe(struct platform_device *dev)
60 p = kzalloc(sizeof (*p), GFP_KERNEL);
64 spin_lock_init(&p->lock);
66 p->rtc = rtc_device_register("rtc-parisc", &dev->dev, &parisc_rtc_ops,
69 int err = PTR_ERR(p->rtc);
74 platform_set_drvdata(dev, p);
79 static int __devexit parisc_rtc_remove(struct platform_device *dev)
81 struct parisc_rtc *p = platform_get_drvdata(dev);
83 rtc_device_unregister(p->rtc);
89 static struct platform_driver parisc_rtc_driver = {
94 .probe = parisc_rtc_probe,
95 .remove = __devexit_p(parisc_rtc_remove),
98 static int __init parisc_rtc_init(void)
100 return platform_driver_register(&parisc_rtc_driver);
103 static void __exit parisc_rtc_fini(void)
105 platform_driver_unregister(&parisc_rtc_driver);
108 module_init(parisc_rtc_init);
109 module_exit(parisc_rtc_fini);
111 MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
112 MODULE_LICENSE("GPL");
113 MODULE_DESCRIPTION("HP PA-RISC RTC driver");