1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017 Texas Instruments Incorporated - http://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/module.h> 11 #include <linux/of_device.h> 12 #include <linux/regmap.h> 13 14 #include <linux/mfd/lp87565.h> 15 16 static const struct regmap_config lp87565_regmap_config = { 17 .reg_bits = 8, 18 .val_bits = 8, 19 .max_register = LP87565_REG_MAX, 20 }; 21 22 static const struct mfd_cell lp87565_cells[] = { 23 { .name = "lp87565-q1-regulator", }, 24 { .name = "lp87565-q1-gpio", }, 25 }; 26 27 static const struct of_device_id of_lp87565_match_table[] = { 28 { .compatible = "ti,lp87565", }, 29 { 30 .compatible = "ti,lp87565-q1", 31 .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1, 32 }, 33 {} 34 }; 35 MODULE_DEVICE_TABLE(of, of_lp87565_match_table); 36 37 static int lp87565_probe(struct i2c_client *client, 38 const struct i2c_device_id *ids) 39 { 40 struct lp87565 *lp87565; 41 const struct of_device_id *of_id; 42 int ret; 43 unsigned int otpid; 44 45 lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL); 46 if (!lp87565) 47 return -ENOMEM; 48 49 lp87565->dev = &client->dev; 50 51 lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config); 52 if (IS_ERR(lp87565->regmap)) { 53 ret = PTR_ERR(lp87565->regmap); 54 dev_err(lp87565->dev, 55 "Failed to initialize register map: %d\n", ret); 56 return ret; 57 } 58 59 ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid); 60 if (ret) { 61 dev_err(lp87565->dev, "Failed to read OTP ID\n"); 62 return ret; 63 } 64 65 lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID; 66 67 of_id = of_match_device(of_lp87565_match_table, &client->dev); 68 if (of_id) 69 lp87565->dev_type = (enum lp87565_device_type)of_id->data; 70 71 i2c_set_clientdata(client, lp87565); 72 73 return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO, 74 lp87565_cells, ARRAY_SIZE(lp87565_cells), 75 NULL, 0, NULL); 76 } 77 78 static const struct i2c_device_id lp87565_id_table[] = { 79 { "lp87565-q1", 0 }, 80 { }, 81 }; 82 MODULE_DEVICE_TABLE(i2c, lp87565_id_table); 83 84 static struct i2c_driver lp87565_driver = { 85 .driver = { 86 .name = "lp87565", 87 .of_match_table = of_lp87565_match_table, 88 }, 89 .probe = lp87565_probe, 90 .id_table = lp87565_id_table, 91 }; 92 module_i2c_driver(lp87565_driver); 93 94 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 95 MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver"); 96 MODULE_LICENSE("GPL v2"); 97