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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Support for OLPC XO-1 Real Time Clock (RTC)
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*
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* Copyright (C) 2011 One Laptop per Child
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*/
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#include <linux/mc146818rtc.h>
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#include <linux/platform_device.h>
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#include <linux/rtc.h>
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#include <linux/of.h>
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#include <asm/msr.h>
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#include <asm/olpc.h>
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#include <asm/x86_init.h>
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static void rtc_wake_on(struct device *dev)
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{
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olpc_xo1_pm_wakeup_set(CS5536_PM_RTC);
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}
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static void rtc_wake_off(struct device *dev)
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{
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olpc_xo1_pm_wakeup_clear(CS5536_PM_RTC);
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}
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static struct resource rtc_platform_resource[] = {
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[0] = {
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.start = RTC_PORT(0),
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.end = RTC_PORT(1),
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.flags = IORESOURCE_IO,
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},
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[1] = {
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.start = RTC_IRQ,
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.end = RTC_IRQ,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct cmos_rtc_board_info rtc_info = {
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.rtc_day_alarm = 0,
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.rtc_mon_alarm = 0,
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.rtc_century = 0,
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.wake_on = rtc_wake_on,
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.wake_off = rtc_wake_off,
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};
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static struct platform_device xo1_rtc_device = {
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.name = "rtc_cmos",
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.id = -1,
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.num_resources = ARRAY_SIZE(rtc_platform_resource),
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.dev.platform_data = &rtc_info,
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.resource = rtc_platform_resource,
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};
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static int __init xo1_rtc_init(void)
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{
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int r;
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struct device_node *node;
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node = of_find_compatible_node(NULL, NULL, "olpc,xo1-rtc");
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if (!node)
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return 0;
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of_node_put(node);
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pr_info("olpc-xo1-rtc: Initializing OLPC XO-1 RTC\n");
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rdmsrl(MSR_RTC_DOMA_OFFSET, rtc_info.rtc_day_alarm);
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rdmsrl(MSR_RTC_MONA_OFFSET, rtc_info.rtc_mon_alarm);
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rdmsrl(MSR_RTC_CEN_OFFSET, rtc_info.rtc_century);
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r = platform_device_register(&xo1_rtc_device);
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if (r)
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return r;
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x86_platform.legacy.rtc = 0;
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device_init_wakeup(&xo1_rtc_device.dev, 1);
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return 0;
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}
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arch_initcall(xo1_rtc_init);
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