/* rtc-starfire.c: Starfire platform RTC driver. * * Copyright (C) 2008 David S. Miller <davem@davemloft.net> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <asm/oplib.h> MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); MODULE_DESCRIPTION("Starfire RTC driver"); MODULE_LICENSE("GPL"); static u32 starfire_get_time(void) { static char obp_gettod[32]; static u32 unix_tod; sprintf(obp_gettod, "h# %08x unix-gettod", (unsigned int) (long) &unix_tod); prom_feval(obp_gettod); return unix_tod; } static int starfire_read_time(struct device *dev, struct rtc_time *tm) { rtc_time_to_tm(starfire_get_time(), tm); return rtc_valid_tm(tm); } static const struct rtc_class_ops starfire_rtc_ops = { .read_time = starfire_read_time, }; static int __init starfire_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc = rtc_device_register("starfire", &pdev->dev, &starfire_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); platform_set_drvdata(pdev, rtc); return 0; } static int __exit starfire_rtc_remove(struct platform_device *pdev) { struct rtc_device *rtc = platform_get_drvdata(pdev); rtc_device_unregister(rtc); return 0; } static struct platform_driver starfire_rtc_driver = { .driver = { .name = "rtc-starfire", .owner = THIS_MODULE, }, .remove = __exit_p(starfire_rtc_remove), }; static int __init starfire_rtc_init(void) { return platform_driver_probe(&starfire_rtc_driver, starfire_rtc_probe); } static void __exit starfire_rtc_exit(void) { platform_driver_unregister(&starfire_rtc_driver); } module_init(starfire_rtc_init); module_exit(starfire_rtc_exit);