linux-imx

/*

 * Micro Crystal RV-3029 / RV-3049 rtc class driver

 *

 * Author: Gregory Hermant <gregory.hermant@calao-systems.com>

 *         Michael Buesch <m@bues.ch>

 *

 * based on previously existing rtc class drivers

 *

 * 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/module.h>

#include <linux/i2c.h>

#include <linux/spi/spi.h>

#include <linux/bcd.h>

#include <linux/rtc.h>

#include <linux/delay.h>

#include <linux/of.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/regmap.h>

​

/* Register map */

/* control section */

#define RV3029_ONOFF_CTRL       0x00

#define RV3029_ONOFF_CTRL_WE        BIT(0)

#define RV3029_ONOFF_CTRL_TE        BIT(1)

#define RV3029_ONOFF_CTRL_TAR       BIT(2)

#define RV3029_ONOFF_CTRL_EERE      BIT(3)

#define RV3029_ONOFF_CTRL_SRON      BIT(4)

#define RV3029_ONOFF_CTRL_TD0       BIT(5)

#define RV3029_ONOFF_CTRL_TD1       BIT(6)

#define RV3029_ONOFF_CTRL_CLKINT    BIT(7)

#define RV3029_IRQ_CTRL         0x01

#define RV3029_IRQ_CTRL_AIE     BIT(0)

#define RV3029_IRQ_CTRL_TIE     BIT(1)

#define RV3029_IRQ_CTRL_V1IE        BIT(2)

#define RV3029_IRQ_CTRL_V2IE        BIT(3)

#define RV3029_IRQ_CTRL_SRIE        BIT(4)

#define RV3029_IRQ_FLAGS        0x02

#define RV3029_IRQ_FLAGS_AF     BIT(0)

#define RV3029_IRQ_FLAGS_TF     BIT(1)

#define RV3029_IRQ_FLAGS_V1IF       BIT(2)

#define RV3029_IRQ_FLAGS_V2IF       BIT(3)

#define RV3029_IRQ_FLAGS_SRF        BIT(4)

#define RV3029_STATUS           0x03

#define RV3029_STATUS_VLOW1     BIT(2)

#define RV3029_STATUS_VLOW2     BIT(3)

#define RV3029_STATUS_SR        BIT(4)

#define RV3029_STATUS_PON       BIT(5)

#define RV3029_STATUS_EEBUSY        BIT(7)

#define RV3029_RST_CTRL         0x04

#define RV3029_RST_CTRL_SYSR        BIT(4)

#define RV3029_CONTROL_SECTION_LEN  0x05

​

/* watch section */

#define RV3029_W_SEC            0x08

#define RV3029_W_MINUTES        0x09

#define RV3029_W_HOURS          0x0A

#define RV3029_REG_HR_12_24     BIT(6) /* 24h/12h mode */