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> | |
7dfe293c | 15 | #include <linux/module.h> |
93ab4718 WF |
16 | #include <linux/mc146818rtc.h> |
17 | ||
18 | #include <asm/prom.h> | |
19 | ||
20 | static int __init add_rtc(void) | |
21 | { | |
22 | struct device_node *np; | |
23 | struct platform_device *pd; | |
ada3ea6f | 24 | struct resource res[2]; |
e517881e | 25 | unsigned int num_res = 1; |
93ab4718 WF |
26 | int ret; |
27 | ||
ada3ea6f KG |
28 | memset(&res, 0, sizeof(res)); |
29 | ||
93ab4718 WF |
30 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00"); |
31 | if (!np) | |
32 | return -ENODEV; | |
33 | ||
ada3ea6f | 34 | ret = of_address_to_resource(np, 0, &res[0]); |
93ab4718 WF |
35 | of_node_put(np); |
36 | if (ret) | |
37 | return ret; | |
38 | ||
39 | /* | |
40 | * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h. Verify that the | |
41 | * address provided by the device node matches. | |
42 | */ | |
ada3ea6f | 43 | if (res[0].start != RTC_PORT(0)) |
93ab4718 WF |
44 | return -EINVAL; |
45 | ||
e517881e AV |
46 | np = of_find_compatible_node(NULL, NULL, "chrp,iic"); |
47 | if (!np) | |
48 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,000"); | |
49 | if (np) { | |
50 | of_node_put(np); | |
51 | /* | |
52 | * Use a fixed interrupt value of 8 since on PPC if we are | |
53 | * using this its off an i8259 which we ensure has interrupt | |
54 | * numbers 0..15. | |
55 | */ | |
56 | res[1].start = 8; | |
57 | res[1].end = 8; | |
58 | res[1].flags = IORESOURCE_IRQ; | |
59 | num_res++; | |
60 | } | |
ada3ea6f | 61 | |
93ab4718 | 62 | pd = platform_device_register_simple("rtc_cmos", -1, |
e517881e | 63 | &res[0], num_res); |
ada3ea6f | 64 | |
93ab4718 WF |
65 | if (IS_ERR(pd)) |
66 | return PTR_ERR(pd); | |
67 | ||
68 | return 0; | |
69 | } | |
70 | fs_initcall(add_rtc); | |
3fbe9d41 AB |
71 | |
72 | MODULE_LICENSE("GPL"); |