/* * 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/module.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]; unsigned int num_res = 1; 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; np = of_find_compatible_node(NULL, NULL, "chrp,iic"); if (!np) np = of_find_compatible_node(NULL, NULL, "pnpPNP,000"); if (np) { of_node_put(np); /* * 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; num_res++; } pd = platform_device_register_simple("rtc_cmos", -1, &res[0], num_res); return PTR_ERR_OR_ZERO(pd); } fs_initcall(add_rtc); MODULE_LICENSE("GPL"); |