linux-imx

/*

 *  Real Time Clock interface for Linux on Atmel AT91RM9200

 *

 *  Copyright (C) 2002 Rick Bronson

 *

 *  Converted to RTC class model by Andrew Victor

 *

 *  Ported to Linux 2.6 by Steven Scholz

 *  Based on s3c2410-rtc.c Simtec Electronics

 *

 *  Based on sa1100-rtc.c by Nils Faerber

 *  Based on rtc.c by Paul Gortmaker

 *

 *  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.

 *

 */

​

#include <linux/bcd.h>

#include <linux/clk.h>

#include <linux/completion.h>

#include <linux/interrupt.h>

#include <linux/ioctl.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/rtc.h>

#include <linux/spinlock.h>

#include <linux/suspend.h>

#include <linux/time.h>

#include <linux/uaccess.h>

​

#include "rtc-at91rm9200.h"

​

#define at91_rtc_read(field) \

    readl_relaxed(at91_rtc_regs + field)

#define at91_rtc_write(field, val) \

    writel_relaxed((val), at91_rtc_regs + field)

​

struct at91_rtc_config {

    bool use_shadow_imr;

};

​

static const struct at91_rtc_config *at91_rtc_config;

static DECLARE_COMPLETION(at91_rtc_updated);

static DECLARE_COMPLETION(at91_rtc_upd_rdy);

static void __iomem *at91_rtc_regs;

static int irq;

static DEFINE_SPINLOCK(at91_rtc_lock);

static u32 at91_rtc_shadow_imr;

static bool suspended;

static DEFINE_SPINLOCK(suspended_lock);

static unsigned long cached_events;

static u32 at91_rtc_imr;

static struct clk *sclk;

​

static void at91_rtc_write_ier(u32 mask)

{