linux-imx

/*

 *  linux/drivers/rtc/rtc-pl030.c

 *

 *  Copyright (C) 2000-2001 Deep Blue Solutions Ltd.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#include <linux/module.h>

#include <linux/rtc.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/amba/bus.h>

#include <linux/io.h>

#include <linux/slab.h>

​

#define RTC_DR      (0)

#define RTC_MR      (4)

#define RTC_STAT    (8)

#define RTC_EOI     (8)

#define RTC_LR      (12)

#define RTC_CR      (16)

#define RTC_CR_MIE  (1 << 0)

​

struct pl030_rtc {

    struct rtc_device   *rtc;

    void __iomem        *base;

};

​

static irqreturn_t pl030_interrupt(int irq, void *dev_id)

{

    struct pl030_rtc *rtc = dev_id;

    writel(0, rtc->base + RTC_EOI);

    return IRQ_HANDLED;

}

​

static int pl030_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)

{

    struct pl030_rtc *rtc = dev_get_drvdata(dev);

​

    rtc_time_to_tm(readl(rtc->base + RTC_MR), &alrm->time);

    return 0;

}

​

static int pl030_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)

{

    struct pl030_rtc *rtc = dev_get_drvdata(dev);

    unsigned long time;

    int ret;

​

    /*

     * At the moment, we can only deal with non-wildcarded alarm times.

     */

    ret = rtc_valid_tm(&alrm->time);

    if (ret == 0)

        ret = rtc_tm_to_time(&alrm->time, &time);

    if (ret == 0)

        writel(time, rtc->base + RTC_MR);

    return ret;

}

​

static int pl030_read_time(struct device *dev, struct rtc_time *tm)