linux-imx

/*

 * Driver for the Epson RTC module RX-6110 SA

 *

 * Copyright(C) 2015 Pengutronix, Steffen Trumtrar <kernel@pengutronix.de>

 * Copyright(C) SEIKO EPSON CORPORATION 2013. All rights reserved.

 *

 * This driver software is distributed as is, without any warranty of any kind,

 * either express or implied as further specified in the GNU Public License.

 * This software may be used and distributed according to the terms of the GNU

 * Public License, version 2 as published by the Free Software Foundation.

 * See the file COPYING in the main directory of this archive for more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program. If not, see <http://www.gnu.org/licenses/>.

 */

​

#include <linux/bcd.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_gpio.h>

#include <linux/regmap.h>

#include <linux/rtc.h>

#include <linux/spi/spi.h>

​

/* RX-6110 Register definitions */

#define RX6110_REG_SEC      0x10

#define RX6110_REG_MIN      0x11

#define RX6110_REG_HOUR     0x12

#define RX6110_REG_WDAY     0x13

#define RX6110_REG_MDAY     0x14

#define RX6110_REG_MONTH    0x15

#define RX6110_REG_YEAR     0x16

#define RX6110_REG_RES1     0x17

#define RX6110_REG_ALMIN    0x18

#define RX6110_REG_ALHOUR   0x19

#define RX6110_REG_ALWDAY   0x1A

#define RX6110_REG_TCOUNT0  0x1B

#define RX6110_REG_TCOUNT1  0x1C

#define RX6110_REG_EXT      0x1D

#define RX6110_REG_FLAG     0x1E

#define RX6110_REG_CTRL     0x1F

#define RX6110_REG_USER0    0x20

#define RX6110_REG_USER1    0x21

#define RX6110_REG_USER2    0x22

#define RX6110_REG_USER3    0x23

#define RX6110_REG_USER4    0x24

#define RX6110_REG_USER5    0x25

#define RX6110_REG_USER6    0x26

#define RX6110_REG_USER7    0x27

#define RX6110_REG_USER8    0x28

#define RX6110_REG_USER9    0x29

#define RX6110_REG_USERA    0x2A

#define RX6110_REG_USERB    0x2B

#define RX6110_REG_USERC    0x2C

#define RX6110_REG_USERD    0x2D

#define RX6110_REG_USERE    0x2E

#define RX6110_REG_USERF    0x2F

#define RX6110_REG_RES2     0x30

#define RX6110_REG_RES3     0x31

#define RX6110_REG_IRQ      0x32

​

#define RX6110_BIT_ALARM_EN     BIT(7)

​

/* Extension Register (1Dh) bit positions */

#define RX6110_BIT_EXT_TSEL0        BIT(0)

#define RX6110_BIT_EXT_TSEL1        BIT(1)

#define RX6110_BIT_EXT_TSEL2        BIT(2)

#define RX6110_BIT_EXT_WADA     BIT(3)

#define RX6110_BIT_EXT_TE       BIT(4)

#define RX6110_BIT_EXT_USEL     BIT(5)

#define RX6110_BIT_EXT_FSEL0        BIT(6)

#define RX6110_BIT_EXT_FSEL1        BIT(7)

​

/* Flag Register (1Eh) bit positions */

#define RX6110_BIT_FLAG_VLF     BIT(1)

#define RX6110_BIT_FLAG_AF      BIT(3)

#define RX6110_BIT_FLAG_TF      BIT(4)

#define RX6110_BIT_FLAG_UF      BIT(5)

​

/* Control Register (1Fh) bit positions */

#define RX6110_BIT_CTRL_TBKE        BIT(0)

#define RX6110_BIT_CTRL_TBKON       BIT(1)

#define RX6110_BIT_CTRL_TSTP        BIT(2)

#define RX6110_BIT_CTRL_AIE     BIT(3)

#define RX6110_BIT_CTRL_TIE     BIT(4)

#define RX6110_BIT_CTRL_UIE     BIT(5)

#define RX6110_BIT_CTRL_STOP        BIT(6)

#define RX6110_BIT_CTRL_TEST        BIT(7)

​

enum {

    RTC_SEC = 0,