2 * Support for OLPC XO-1 Real Time Clock (RTC)
4 * Copyright (C) 2011 One Laptop per Child
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/mc146818rtc.h>
13 #include <linux/platform_device.h>
14 #include <linux/rtc.h>
20 static void rtc_wake_on(struct device *dev)
22 olpc_xo1_pm_wakeup_set(CS5536_PM_RTC);
25 static void rtc_wake_off(struct device *dev)
27 olpc_xo1_pm_wakeup_clear(CS5536_PM_RTC);
30 static struct resource rtc_platform_resource[] = {
34 .flags = IORESOURCE_IO,
39 .flags = IORESOURCE_IRQ,
43 static struct cmos_rtc_board_info rtc_info = {
47 .wake_on = rtc_wake_on,
48 .wake_off = rtc_wake_off,
51 static struct platform_device xo1_rtc_device = {
54 .num_resources = ARRAY_SIZE(rtc_platform_resource),
55 .dev.platform_data = &rtc_info,
56 .resource = rtc_platform_resource,
59 static int __init xo1_rtc_init(void)
62 struct device_node *node;
64 node = of_find_compatible_node(NULL, NULL, "olpc,xo1-rtc");
69 pr_info("olpc-xo1-rtc: Initializing OLPC XO-1 RTC\n");
70 rdmsrl(MSR_RTC_DOMA_OFFSET, rtc_info.rtc_day_alarm);
71 rdmsrl(MSR_RTC_MONA_OFFSET, rtc_info.rtc_mon_alarm);
72 rdmsrl(MSR_RTC_CEN_OFFSET, rtc_info.rtc_century);
74 r = platform_device_register(&xo1_rtc_device);
78 device_init_wakeup(&xo1_rtc_device.dev, 1);
81 arch_initcall(xo1_rtc_init);