linux-imx

/* rtc-da9063.c - Real time clock device driver for DA9063

 * Copyright (C) 2013-2015  Dialog Semiconductor Ltd.

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/rtc.h>

#include <linux/slab.h>

​

#include <linux/mfd/da9062/registers.h>

#include <linux/mfd/da9063/registers.h>

#include <linux/mfd/da9063/core.h>

​

#define YEARS_TO_DA9063(year)       ((year) - 100)

#define MONTHS_TO_DA9063(month)     ((month) + 1)

#define YEARS_FROM_DA9063(year)     ((year) + 100)

#define MONTHS_FROM_DA9063(month)   ((month) - 1)

​

enum {

    RTC_SEC = 0,

    RTC_MIN = 1,

    RTC_HOUR = 2,

    RTC_DAY = 3,

    RTC_MONTH = 4,

    RTC_YEAR = 5,

    RTC_DATA_LEN

};

​

struct da9063_compatible_rtc_regmap {

    /* REGS */

    int rtc_enable_reg;

    int rtc_enable_32k_crystal_reg;

    int rtc_alarm_secs_reg;

    int rtc_alarm_year_reg;

    int rtc_count_secs_reg;

    int rtc_count_year_reg;

    int rtc_event_reg;

    /* MASKS */

    int rtc_enable_mask;

    int rtc_crystal_mask;

    int rtc_event_alarm_mask;

    int rtc_alarm_on_mask;

    int rtc_alarm_status_mask;

    int rtc_tick_on_mask;

    int rtc_ready_to_read_mask;

    int rtc_count_sec_mask;

    int rtc_count_min_mask;

    int rtc_count_hour_mask;

    int rtc_count_day_mask;

    int rtc_count_month_mask;

    int rtc_count_year_mask;

    /* ALARM CONFIG */

    int rtc_data_start;

    int rtc_alarm_len;

};

​

struct da9063_compatible_rtc {

    struct rtc_device *rtc_dev;

    struct rtc_time alarm_time;

    struct regmap *regmap;

    const struct da9063_compatible_rtc_regmap *config;

    bool rtc_sync;

};

​

static const struct da9063_compatible_rtc_regmap da9063_ad_regs = {

    /* REGS */

    .rtc_enable_reg             = DA9063_REG_CONTROL_E,

    .rtc_alarm_secs_reg         = DA9063_AD_REG_ALARM_MI,

    .rtc_alarm_year_reg         = DA9063_AD_REG_ALARM_Y,

    .rtc_count_secs_reg         = DA9063_REG_COUNT_S,

    .rtc_count_year_reg         = DA9063_REG_COUNT_Y,

    .rtc_event_reg              = DA9063_REG_EVENT_A,

    /* MASKS */

    .rtc_enable_mask            = DA9063_RTC_EN,

    .rtc_crystal_mask           = DA9063_CRYSTAL,

    .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K,