projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 93ab4718 WF |
1 | /* |
| 2 | * Setup code for PC-style Real-Time Clock. | |
| 3 | * | |
| 4 | * Author: Wade Farnsworth <wfarnsworth@mvista.com> | |
| 5 | * | |
| 6 | * 2007 (c) MontaVista Software, Inc. This file is licensed under | |
| 7 | * the terms of the GNU General Public License version 2. This program | |
| 8 | * is licensed "as is" without any warranty of any kind, whether express | |
| 9 | * or implied. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/platform_device.h> | |
| 13 | #include <linux/err.h> | |
| 14 | #include <linux/init.h> | |
| 15 | #include <linux/mc146818rtc.h> | |
| 16 | ||
| 17 | #include <asm/prom.h> | |
| 18 | ||
| 19 | static int __init add_rtc(void) | |
| 20 | { | |
| 21 | struct device_node *np; | |
| 22 | struct platform_device *pd; | |
| ada3ea6f | 23 | struct resource res[2]; |
| e517881e | 24 | unsigned int num_res = 1; |
| 93ab4718 WF |
25 | int ret; |
| 26 | ||
| ada3ea6f KG |
27 | memset(&res, 0, sizeof(res)); |
| 28 | ||
| 93ab4718 WF |
29 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00"); |
| 30 | if (!np) | |
| 31 | return -ENODEV; | |
| 32 | ||
| ada3ea6f | 33 | ret = of_address_to_resource(np, 0, &res[0]); |
| 93ab4718 WF |
34 | of_node_put(np); |
| 35 | if (ret) | |
| 36 | return ret; | |
| 37 | ||
| 38 | /* | |
| 39 | * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h. Verify that the | |
| 40 | * address provided by the device node matches. | |
| 41 | */ | |
| ada3ea6f | 42 | if (res[0].start != RTC_PORT(0)) |
| 93ab4718 WF |
43 | return -EINVAL; |
| 44 | ||
| e517881e AV |
45 | np = of_find_compatible_node(NULL, NULL, "chrp,iic"); |
| 46 | if (!np) | |
| 47 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,000"); | |
| 48 | if (np) { | |
| 49 | of_node_put(np); | |
| 50 | /* | |
| 51 | * Use a fixed interrupt value of 8 since on PPC if we are | |
| 52 | * using this its off an i8259 which we ensure has interrupt | |
| 53 | * numbers 0..15. | |
| 54 | */ | |
| 55 | res[1].start = 8; | |
| 56 | res[1].end = 8; | |
| 57 | res[1].flags = IORESOURCE_IRQ; | |
| 58 | num_res++; | |
| 59 | } | |
| ada3ea6f | 60 | |
| 93ab4718 | 61 | pd = platform_device_register_simple("rtc_cmos", -1, |
| e517881e | 62 | &res[0], num_res); |
| ada3ea6f | 63 | |
| 93ab4718 WF |
64 | if (IS_ERR(pd)) |
| 65 | return PTR_ERR(pd); | |
| 66 | ||
| 67 | return 0; | |
| 68 | } | |
| 69 | fs_initcall(add_rtc); | |
| 3fbe9d41 AB |
70 | |
| 71 | MODULE_LICENSE("GPL"); |