linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * TPS68470 chip Parent driver

 *

 * Copyright (C) 2017 Intel Corporation

 *

 * Authors:

 *  Rajmohan Mani <rajmohan.mani@intel.com>

 *  Tianshu Qiu <tian.shu.qiu@intel.com>

 *  Jian Xu Zheng <jian.xu.zheng@intel.com>

 *  Yuning Pu <yuning.pu@intel.com>

 */

​

#include <linux/acpi.h>

#include <linux/delay.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/mfd/core.h>

#include <linux/mfd/tps68470.h>

#include <linux/regmap.h>

​

static const struct mfd_cell tps68470s[] = {

    { .name = "tps68470-gpio" },

    { .name = "tps68470_pmic_opregion" },

};

​

static const struct regmap_config tps68470_regmap_config = {

    .reg_bits = 8,

    .val_bits = 8,

    .max_register = TPS68470_REG_MAX,

};

​

static int tps68470_chip_init(struct device *dev, struct regmap *regmap)

{

    unsigned int version;

    int ret;

​

    /* Force software reset */

    ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);

    if (ret)

        return ret;

​

    ret = regmap_read(regmap, TPS68470_REG_REVID, &version);

    if (ret) {

        dev_err(dev, "Failed to read revision register: %d\n", ret);

        return ret;

    }

​

    dev_info(dev, "TPS68470 REVID: 0x%x\n", version);

​

    return 0;

}

​

static int tps68470_probe(struct i2c_client *client)

{

    struct device *dev = &client->dev;

    struct regmap *regmap;

    int ret;

​

    regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);

    if (IS_ERR(regmap)) {

        dev_err(dev, "devm_regmap_init_i2c Error %ld\n",

            PTR_ERR(regmap));