/* * Copyright 2011 Tilera Corporation. All Rights Reserved. * *   This program is free software; you can redistribute it and/or *   modify it under the terms of the GNU General Public License *   as published by the Free Software Foundation, version 2. * *   This program is distributed in the hope that it will be useful, but *   WITHOUT ANY WARRANTY; without even the implied warranty of *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or *   NON INFRINGEMENT.  See the GNU General Public License for *   more details. * * Tilera-specific RTC driver. */ #include <linux/module.h>#include <linux/device.h>#include <linux/rtc.h>#include <linux/platform_device.h> /* Platform device pointer. */static struct platform_device *tile_rtc_platform_device; /* * RTC read routine.  Gets time info from RTC chip via hypervisor syscall. */static int read_rtc_time(struct device *dev, struct rtc_time *tm){	HV_RTCTime hvtm = hv_get_rtc(); 	tm->tm_sec = hvtm.tm_sec;	tm->tm_min = hvtm.tm_min;	tm->tm_hour = hvtm.tm_hour;	tm->tm_mday = hvtm.tm_mday;	tm->tm_mon = hvtm.tm_mon;	tm->tm_year = hvtm.tm_year;	tm->tm_wday = 0;	tm->tm_yday = 0;	tm->tm_isdst = 0; 	if (rtc_valid_tm(tm) < 0)		dev_warn(dev, "Read invalid date/time from RTC\n"); 	return 0;} /* * RTC write routine.  Sends time info to hypervisor via syscall, to be * written to RTC chip. */static int set_rtc_time(struct device *dev, struct rtc_time *tm){	HV_RTCTime hvtm; 	hvtm.tm_sec = tm->tm_sec;	hvtm.tm_min = tm->tm_min;	hvtm.tm_hour = tm->tm_hour;	hvtm.tm_mday = tm->tm_mday;	hvtm.tm_mon = tm->tm_mon;	hvtm.tm_year = tm->tm_year; 	hv_set_rtc(hvtm); 	return 0;} /* * RTC read/write ops. */static const struct rtc_class_ops tile_rtc_ops = {	.read_time	= read_rtc_time,	.set_time	= set_rtc_time,}; /* * Device probe routine. */static int tile_rtc_probe(struct platform_device *dev){	struct rtc_device *rtc; 	rtc = devm_rtc_device_register(&dev->dev, "tile",				&tile_rtc_ops, THIS_MODULE); 	if (IS_ERR(rtc))		return PTR_ERR(rtc); 	platform_set_drvdata(dev, rtc); 	return 0;} static struct platform_driver tile_rtc_platform_driver = {	.driver		= {		.name	= "rtc-tile",	},	.probe		= tile_rtc_probe,}; /* * Driver init routine. */static int __init tile_rtc_driver_init(void){	int err; 	err = platform_driver_register(&tile_rtc_platform_driver);	if (err)		return err; 	tile_rtc_platform_device = platform_device_alloc("rtc-tile", 0);	if (tile_rtc_platform_device == NULL) {		err = -ENOMEM;		goto exit_driver_unregister;	} 	err = platform_device_add(tile_rtc_platform_device);	if (err)		goto exit_device_put; 	return 0; exit_device_put:	platform_device_put(tile_rtc_platform_device); exit_driver_unregister:	platform_driver_unregister(&tile_rtc_platform_driver);	return err;} /* * Driver cleanup routine. */static void __exit tile_rtc_driver_exit(void){	platform_device_unregister(tile_rtc_platform_device);	platform_driver_unregister(&tile_rtc_platform_driver);} module_init(tile_rtc_driver_init);module_exit(tile_rtc_driver_exit); MODULE_DESCRIPTION("Tilera-specific Real Time Clock Driver");MODULE_LICENSE("GPL");MODULE_ALIAS("platform:rtc-tile");