| /* | |
| * 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"); |