/* * Setup code for PC-style Real-Time Clock. * * Author: Wade Farnsworth <wfarnsworth@mvista.com> * * 2007 (c) MontaVista Software, Inc. This file is licensed under * the terms of the GNU General Public License version 2. This program * is licensed "as is" without any warranty of any kind, whether express * or implied. */ #include <linux/platform_device.h>#include <linux/err.h>#include <linux/init.h>#include <linux/mc146818rtc.h> #include <asm/prom.h> static int  __init add_rtc(void){	struct device_node *np;	struct platform_device *pd;	struct resource res[2];	int ret; 	memset(&res, 0, sizeof(res)); 	np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00");	if (!np)		return -ENODEV; 	ret = of_address_to_resource(np, 0, &res[0]);	of_node_put(np);	if (ret)		return ret; 	/*	 * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h.  Verify that the	 * address provided by the device node matches.	 */	if (res[0].start != RTC_PORT(0))		return -EINVAL; 	/* Use a fixed interrupt value of 8 since on PPC if we are using this	 * its off an i8259 which we ensure has interrupt numbers 0..15. */	res[1].start = 8;	res[1].end = 8;	res[1].flags = IORESOURCE_IRQ; 	pd = platform_device_register_simple("rtc_cmos", -1,					     &res[0], 2); 	if (IS_ERR(pd))		return PTR_ERR(pd); 	return 0;}fs_initcall(add_rtc); MODULE_LICENSE("GPL");