linux-imx

// SPDX-License-Identifier: GPL-2.0+

//

// max8997.c - mfd core driver for the Maxim 8966 and 8997

//

// Copyright (C) 2011 Samsung Electronics

// MyungJoo Ham <myungjoo.ham@samsung.com>

//

// This driver is based on max8998.c

​

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/interrupt.h>

#include <linux/pm_runtime.h>

#include <linux/init.h>

#include <linux/mutex.h>

#include <linux/mfd/core.h>

#include <linux/mfd/max8997.h>

#include <linux/mfd/max8997-private.h>

​

#define I2C_ADDR_PMIC   (0xCC >> 1)

#define I2C_ADDR_MUIC   (0x4A >> 1)

#define I2C_ADDR_BATTERY    (0x6C >> 1)

#define I2C_ADDR_RTC    (0x0C >> 1)

#define I2C_ADDR_HAPTIC (0x90 >> 1)

​

static const struct mfd_cell max8997_devs[] = {

    { .name = "max8997-pmic", },

    { .name = "max8997-rtc", },

    { .name = "max8997-battery", },

    { .name = "max8997-haptic", },

    { .name = "max8997-muic", },

    { .name = "max8997-led", .id = 1 },

    { .name = "max8997-led", .id = 2 },

};

​

#ifdef CONFIG_OF

static const struct of_device_id max8997_pmic_dt_match[] = {

    { .compatible = "maxim,max8997-pmic", .data = (void *)TYPE_MAX8997 },

    {},

};

#endif

​

int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)

{

    struct max8997_dev *max8997 = i2c_get_clientdata(i2c);

    int ret;

​

    mutex_lock(&max8997->iolock);

    ret = i2c_smbus_read_byte_data(i2c, reg);

    mutex_unlock(&max8997->iolock);

    if (ret < 0)

        return ret;

​

    ret &= 0xff;

    *dest = ret;

    return 0;

}

EXPORT_SYMBOL_GPL(max8997_read_reg);

​

int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)

{

    struct max8997_dev *max8997 = i2c_get_clientdata(i2c);

    int ret;

​

    mutex_lock(&max8997->iolock);

    ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);

    mutex_unlock(&max8997->iolock);

    if (ret < 0)

        return ret;

​

    return 0;

}

EXPORT_SYMBOL_GPL(max8997_bulk_read);

​

int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)

{

    struct max8997_dev *max8997 = i2c_get_clientdata(i2c);

    int ret;

​

    mutex_lock(&max8997->iolock);

    ret = i2c_smbus_write_byte_data(i2c, reg, value);

    mutex_unlock(&max8997->iolock);

    return ret;

}

EXPORT_SYMBOL_GPL(max8997_write_reg);

​

int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)

{

    struct max8997_dev *max8997 = i2c_get_clientdata(i2c);