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 .compatible = "ti,lp87561-q1", 35 .data = (void *)LP87565_DEVICE_TYPE_LP87561_Q1, 36 }, 37 {} 38 }; 39 MODULE_DEVICE_TABLE(of, of_lp87565_match_table); 40 41 static int lp87565_probe(struct i2c_client *client, 42 const struct i2c_device_id *ids) 43 { 44 struct lp87565 *lp87565; 45 const struct of_device_id *of_id; 46 int ret; 47 unsigned int otpid; 48 49 lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL); 50 if (!lp87565) 51 return -ENOMEM; 52 53 lp87565->dev = &client->dev; 54 55 lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config); 56 if (IS_ERR(lp87565->regmap)) { 57 ret = PTR_ERR(lp87565->regmap); 58 dev_err(lp87565->dev, 59 "Failed to initialize register map: %d\n", ret); 60 return ret; 61 } 62 63 ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid); 64 if (ret) { 65 dev_err(lp87565->dev, "Failed to read OTP ID\n"); 66 return ret; 67 } 68 69 lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID; 70 71 of_id = of_match_device(of_lp87565_match_table, &client->dev); 72 if (of_id) 73 lp87565->dev_type = (enum lp87565_device_type)of_id->data; 74 75 i2c_set_clientdata(client, lp87565); 76 77 return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO, 78 lp87565_cells, ARRAY_SIZE(lp87565_cells), 79 NULL, 0, NULL); 80 } 81 82 static const struct i2c_device_id lp87565_id_table[] = { 83 { "lp87565-q1", 0 }, 84 { }, 85 }; 86 MODULE_DEVICE_TABLE(i2c, lp87565_id_table); 87 88 static struct i2c_driver lp87565_driver = { 89 .driver = { 90 .name = "lp87565", 91 .of_match_table = of_lp87565_match_table, 92 }, 93 .probe = lp87565_probe, 94 .id_table = lp87565_id_table, 95 }; 96 module_i2c_driver(lp87565_driver); 97 98 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 99 MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver"); 100 MODULE_LICENSE("GPL v2"); 101