linux-imx

/*

 * An I2C driver for the Philips PCF8563 RTC

 * Copyright 2005-06 Tower Technologies

 *

 * Author: Alessandro Zummo <a.zummo@towertech.it>

 * Maintainers: http://www.nslu2-linux.org/

 *

 * based on the other drivers in this same directory.

 *

 * http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf

 *

 * 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/clk-provider.h>

#include <linux/i2c.h>

#include <linux/bcd.h>

#include <linux/rtc.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/err.h>

​

#define PCF8563_REG_ST1     0x00 /* status */

#define PCF8563_REG_ST2     0x01

#define PCF8563_BIT_AIE     (1 << 1)

#define PCF8563_BIT_AF      (1 << 3)

#define PCF8563_BITS_ST2_N  (7 << 5)

​

#define PCF8563_REG_SC      0x02 /* datetime */

#define PCF8563_REG_MN      0x03

#define PCF8563_REG_HR      0x04

#define PCF8563_REG_DM      0x05

#define PCF8563_REG_DW      0x06

#define PCF8563_REG_MO      0x07

#define PCF8563_REG_YR      0x08

​

#define PCF8563_REG_AMN     0x09 /* alarm */

​

#define PCF8563_REG_CLKO        0x0D /* clock out */

#define PCF8563_REG_CLKO_FE     0x80 /* clock out enabled */

#define PCF8563_REG_CLKO_F_MASK     0x03 /* frequenc mask */

#define PCF8563_REG_CLKO_F_32768HZ  0x00

#define PCF8563_REG_CLKO_F_1024HZ   0x01

#define PCF8563_REG_CLKO_F_32HZ     0x02

#define PCF8563_REG_CLKO_F_1HZ      0x03

​

#define PCF8563_REG_TMRC    0x0E /* timer control */

#define PCF8563_TMRC_ENABLE BIT(7)

#define PCF8563_TMRC_4096   0

#define PCF8563_TMRC_64     1

#define PCF8563_TMRC_1      2

#define PCF8563_TMRC_1_60   3

#define PCF8563_TMRC_MASK   3

​

#define PCF8563_REG_TMR     0x0F /* timer */

​

#define PCF8563_SC_LV       0x80 /* low voltage */

#define PCF8563_MO_C        0x80 /* century */

​

static struct i2c_driver pcf8563_driver;