| /* |
| * 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_RET(pd); |
| } |
| fs_initcall(add_rtc); |
| |
| MODULE_LICENSE("GPL"); |
