linux-imx

/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.

 *

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

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

 * only version 2 as published by the Free Software Foundation.

 *

 * 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/of.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/rtc.h>

#include <linux/platform_device.h>

#include <linux/pm.h>

#include <linux/regmap.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

​

/* RTC Register offsets from RTC CTRL REG */

#define PM8XXX_ALARM_CTRL_OFFSET    0x01

#define PM8XXX_RTC_WRITE_OFFSET     0x02

#define PM8XXX_RTC_READ_OFFSET      0x06

#define PM8XXX_ALARM_RW_OFFSET      0x0A

​

/* RTC_CTRL register bit fields */

#define PM8xxx_RTC_ENABLE       BIT(7)

#define PM8xxx_RTC_ALARM_CLEAR      BIT(0)

​

#define NUM_8_BIT_RTC_REGS      0x4

​

/**

 * struct pm8xxx_rtc_regs - describe RTC registers per PMIC versions

 * @ctrl: base address of control register

 * @write: base address of write register

 * @read: base address of read register

 * @alarm_ctrl: base address of alarm control register

 * @alarm_ctrl2: base address of alarm control2 register

 * @alarm_rw: base address of alarm read-write register

 * @alarm_en: alarm enable mask

 */

struct pm8xxx_rtc_regs {

    unsigned int ctrl;

    unsigned int write;

    unsigned int read;

    unsigned int alarm_ctrl;

    unsigned int alarm_ctrl2;

    unsigned int alarm_rw;

    unsigned int alarm_en;

};

​

/**

 * struct pm8xxx_rtc -  rtc driver internal structure

 * @rtc:        rtc device for this driver.

 * @regmap:     regmap used to access RTC registers

 * @allow_set_time: indicates whether writing to the RTC is allowed

 * @rtc_alarm_irq:  rtc alarm irq number.

 * @ctrl_reg:       rtc control register.

 * @rtc_dev:        device structure.

 * @ctrl_reg_lock:  spinlock protecting access to ctrl_reg.

 */