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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/4 *5 * Author: Keerthy <j-keerthy@ti.com>6 */7 8#include <linux/interrupt.h>9#include <linux/mfd/core.h>10#include <linux/mod_devicetable.h>11#include <linux/module.h>12#include <linux/regmap.h>13 14#include <linux/mfd/lp873x.h>15 16static const struct regmap_config lp873x_regmap_config = {17 .reg_bits = 8,18 .val_bits = 8,19 .max_register = LP873X_REG_MAX,20};21 22static const struct mfd_cell lp873x_cells[] = {23 { .name = "lp873x-regulator", },24 { .name = "lp873x-gpio", },25};26 27static int lp873x_probe(struct i2c_client *client)28{29 struct lp873x *lp873;30 int ret;31 unsigned int otpid;32 33 lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);34 if (!lp873)35 return -ENOMEM;36 37 lp873->dev = &client->dev;38 39 lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);40 if (IS_ERR(lp873->regmap)) {41 ret = PTR_ERR(lp873->regmap);42 dev_err(lp873->dev,43 "Failed to initialize register map: %d\n", ret);44 return ret;45 }46 47 ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);48 if (ret) {49 dev_err(lp873->dev, "Failed to read OTP ID\n");50 return ret;51 }52 53 lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;54 55 i2c_set_clientdata(client, lp873);56 57 ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,58 ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);59 60 return ret;61}62 63static const struct of_device_id of_lp873x_match_table[] = {64 { .compatible = "ti,lp8733", },65 { .compatible = "ti,lp8732", },66 {}67};68MODULE_DEVICE_TABLE(of, of_lp873x_match_table);69 70static const struct i2c_device_id lp873x_id_table[] = {71 { "lp873x" },72 { }73};74MODULE_DEVICE_TABLE(i2c, lp873x_id_table);75 76static struct i2c_driver lp873x_driver = {77 .driver = {78 .name = "lp873x",79 .of_match_table = of_lp873x_match_table,80 },81 .probe = lp873x_probe,82 .id_table = lp873x_id_table,83};84module_i2c_driver(lp873x_driver);85 86MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");87MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");88MODULE_LICENSE("GPL v2");89