linux-imx

/*

 *  Real Time Clock driver for Wolfson Microelectronics WM831x

 *

 *  Copyright (C) 2009 Wolfson Microelectronics PLC.

 *

 *  Author: Mark Brown <broonie@opensource.wolfsonmicro.com>

 *

 *  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/module.h>

#include <linux/kernel.h>

#include <linux/time.h>

#include <linux/rtc.h>

#include <linux/slab.h>

#include <linux/bcd.h>

#include <linux/interrupt.h>

#include <linux/ioctl.h>

#include <linux/completion.h>

#include <linux/mfd/wm831x/core.h>

#include <linux/delay.h>

#include <linux/platform_device.h>

#include <linux/random.h>

​

/*

 * R16416 (0x4020) - RTC Write Counter

 */

#define WM831X_RTC_WR_CNT_MASK                  0xFFFF  /* RTC_WR_CNT - [15:0] */

#define WM831X_RTC_WR_CNT_SHIFT                      0  /* RTC_WR_CNT - [15:0] */

#define WM831X_RTC_WR_CNT_WIDTH                     16  /* RTC_WR_CNT - [15:0] */

​

/*

 * R16417 (0x4021) - RTC Time 1

 */

#define WM831X_RTC_TIME_MASK                    0xFFFF  /* RTC_TIME - [15:0] */

#define WM831X_RTC_TIME_SHIFT                        0  /* RTC_TIME - [15:0] */

#define WM831X_RTC_TIME_WIDTH                       16  /* RTC_TIME - [15:0] */

​

/*

 * R16418 (0x4022) - RTC Time 2

 */

#define WM831X_RTC_TIME_MASK                    0xFFFF  /* RTC_TIME - [15:0] */

#define WM831X_RTC_TIME_SHIFT                        0  /* RTC_TIME - [15:0] */

#define WM831X_RTC_TIME_WIDTH                       16  /* RTC_TIME - [15:0] */

​

/*

 * R16419 (0x4023) - RTC Alarm 1

 */

#define WM831X_RTC_ALM_MASK                     0xFFFF  /* RTC_ALM - [15:0] */

#define WM831X_RTC_ALM_SHIFT                         0  /* RTC_ALM - [15:0] */

#define WM831X_RTC_ALM_WIDTH                        16  /* RTC_ALM - [15:0] */

​

/*

 * R16420 (0x4024) - RTC Alarm 2

 */

#define WM831X_RTC_ALM_MASK                     0xFFFF  /* RTC_ALM - [15:0] */

#define WM831X_RTC_ALM_SHIFT                         0  /* RTC_ALM - [15:0] */

#define WM831X_RTC_ALM_WIDTH                        16  /* RTC_ALM - [15:0] */

​

/*

 * R16421 (0x4025) - RTC Control

 */

#define WM831X_RTC_VALID                        0x8000  /* RTC_VALID */

#define WM831X_RTC_VALID_MASK                   0x8000  /* RTC_VALID */

#define WM831X_RTC_VALID_SHIFT                      15  /* RTC_VALID */

#define WM831X_RTC_VALID_WIDTH                       1  /* RTC_VALID */

#define WM831X_RTC_SYNC_BUSY                    0x4000  /* RTC_SYNC_BUSY */

#define WM831X_RTC_SYNC_BUSY_MASK               0x4000  /* RTC_SYNC_BUSY */

#define WM831X_RTC_SYNC_BUSY_SHIFT                  14  /* RTC_SYNC_BUSY */

#define WM831X_RTC_SYNC_BUSY_WIDTH                   1  /* RTC_SYNC_BUSY */

#define WM831X_RTC_ALM_ENA                      0x0400  /* RTC_ALM_ENA */

#define WM831X_RTC_ALM_ENA_MASK                 0x0400  /* RTC_ALM_ENA */

#define WM831X_RTC_ALM_ENA_SHIFT                    10  /* RTC_ALM_ENA */

#define WM831X_RTC_ALM_ENA_WIDTH                     1  /* RTC_ALM_ENA */

#define WM831X_RTC_PINT_FREQ_MASK               0x0070  /* RTC_PINT_FREQ - [6:4] */

#define WM831X_RTC_PINT_FREQ_SHIFT                   4  /* RTC_PINT_FREQ - [6:4] */

#define WM831X_RTC_PINT_FREQ_WIDTH                   3  /* RTC_PINT_FREQ - [6:4] */

​

/*

 * R16422 (0x4026) - RTC Trim

 */

#define WM831X_RTC_TRIM_MASK                    0x03FF  /* RTC_TRIM - [9:0] */

#define WM831X_RTC_TRIM_SHIFT                        0  /* RTC_TRIM - [9:0] */

#define WM831X_RTC_TRIM_WIDTH                       10  /* RTC_TRIM - [9:0] */

​

#define WM831X_SET_TIME_RETRIES 5

#define WM831X_GET_TIME_RETRIES 5

​