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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/4 *5 * Author: Keerthy <j-keerthy@ti.com>6 */7 8#include <linux/gpio/consumer.h>9#include <linux/i2c.h>10#include <linux/interrupt.h>11#include <linux/mfd/core.h>12#include <linux/mod_devicetable.h>13#include <linux/module.h>14#include <linux/regmap.h>15 16#include <linux/mfd/lp87565.h>17 18static const struct regmap_config lp87565_regmap_config = {19 .reg_bits = 8,20 .val_bits = 8,21 .max_register = LP87565_REG_MAX,22};23 24static const struct mfd_cell lp87565_cells[] = {25 { .name = "lp87565-q1-regulator", },26 { .name = "lp87565-q1-gpio", },27};28 29static const struct of_device_id of_lp87565_match_table[] = {30 { .compatible = "ti,lp87565", },31 {32 .compatible = "ti,lp87524-q1",33 .data = (void *)LP87565_DEVICE_TYPE_LP87524_Q1,34 },35 {36 .compatible = "ti,lp87565-q1",37 .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1,38 },39 {40 .compatible = "ti,lp87561-q1",41 .data = (void *)LP87565_DEVICE_TYPE_LP87561_Q1,42 },43 {}44};45MODULE_DEVICE_TABLE(of, of_lp87565_match_table);46 47static int lp87565_probe(struct i2c_client *client)48{49 struct lp87565 *lp87565;50 int ret;51 unsigned int otpid;52 53 lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);54 if (!lp87565)55 return -ENOMEM;56 57 lp87565->dev = &client->dev;58 59 lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);60 if (IS_ERR(lp87565->regmap)) {61 ret = PTR_ERR(lp87565->regmap);62 dev_err(lp87565->dev,63 "Failed to initialize register map: %d\n", ret);64 return ret;65 }66 67 lp87565->reset_gpio = devm_gpiod_get_optional(lp87565->dev, "reset",68 GPIOD_OUT_LOW);69 if (IS_ERR(lp87565->reset_gpio)) {70 ret = PTR_ERR(lp87565->reset_gpio);71 if (ret == -EPROBE_DEFER)72 return ret;73 }74 75 if (lp87565->reset_gpio) {76 gpiod_set_value_cansleep(lp87565->reset_gpio, 1);77 /* The minimum assertion time is undocumented, just guess */78 usleep_range(2000, 4000);79 80 gpiod_set_value_cansleep(lp87565->reset_gpio, 0);81 /* Min 1.2 ms before first I2C transaction */82 usleep_range(1500, 3000);83 }84 85 ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);86 if (ret) {87 dev_err(lp87565->dev, "Failed to read OTP ID\n");88 return ret;89 }90 91 lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;92 lp87565->dev_type = (uintptr_t)i2c_get_match_data(client);93 94 i2c_set_clientdata(client, lp87565);95 96 return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO,97 lp87565_cells, ARRAY_SIZE(lp87565_cells),98 NULL, 0, NULL);99}100 101static void lp87565_shutdown(struct i2c_client *client)102{103 struct lp87565 *lp87565 = i2c_get_clientdata(client);104 105 gpiod_set_value_cansleep(lp87565->reset_gpio, 1);106}107 108static const struct i2c_device_id lp87565_id_table[] = {109 { "lp87565-q1" },110 { }111};112MODULE_DEVICE_TABLE(i2c, lp87565_id_table);113 114static struct i2c_driver lp87565_driver = {115 .driver = {116 .name = "lp87565",117 .of_match_table = of_lp87565_match_table,118 },119 .probe = lp87565_probe,120 .shutdown = lp87565_shutdown,121 .id_table = lp87565_id_table,122};123module_i2c_driver(lp87565_driver);124 125MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");126MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");127MODULE_LICENSE("GPL v2");128