1 /* 2 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ 3 * 4 * Author: Keerthy <j-keerthy@ti.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation version 2. 9 */ 10 11 #include <linux/interrupt.h> 12 #include <linux/mfd/core.h> 13 #include <linux/module.h> 14 #include <linux/of_device.h> 15 #include <linux/regmap.h> 16 17 #include <linux/mfd/lp87565.h> 18 19 static const struct regmap_config lp87565_regmap_config = { 20 .reg_bits = 8, 21 .val_bits = 8, 22 .max_register = LP87565_REG_MAX, 23 }; 24 25 static const struct mfd_cell lp87565_cells[] = { 26 { .name = "lp87565-q1-regulator", }, 27 { .name = "lp87565-q1-gpio", }, 28 }; 29 30 static const struct of_device_id of_lp87565_match_table[] = { 31 { .compatible = "ti,lp87565", }, 32 { 33 .compatible = "ti,lp87565-q1", 34 .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1, 35 }, 36 {} 37 }; 38 MODULE_DEVICE_TABLE(of, of_lp87565_match_table); 39 40 static int lp87565_probe(struct i2c_client *client, 41 const struct i2c_device_id *ids) 42 { 43 struct lp87565 *lp87565; 44 const struct of_device_id *of_id; 45 int ret; 46 unsigned int otpid; 47 48 lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL); 49 if (!lp87565) 50 return -ENOMEM; 51 52 lp87565->dev = &client->dev; 53 54 lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config); 55 if (IS_ERR(lp87565->regmap)) { 56 ret = PTR_ERR(lp87565->regmap); 57 dev_err(lp87565->dev, 58 "Failed to initialize register map: %d\n", ret); 59 return ret; 60 } 61 62 ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid); 63 if (ret) { 64 dev_err(lp87565->dev, "Failed to read OTP ID\n"); 65 return ret; 66 } 67 68 lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID; 69 70 of_id = of_match_device(of_lp87565_match_table, &client->dev); 71 if (of_id) 72 lp87565->dev_type = (enum lp87565_device_type)of_id->data; 73 74 i2c_set_clientdata(client, lp87565); 75 76 return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO, 77 lp87565_cells, ARRAY_SIZE(lp87565_cells), 78 NULL, 0, NULL); 79 } 80 81 static const struct i2c_device_id lp87565_id_table[] = { 82 { "lp87565-q1", 0 }, 83 { }, 84 }; 85 MODULE_DEVICE_TABLE(i2c, lp87565_id_table); 86 87 static struct i2c_driver lp87565_driver = { 88 .driver = { 89 .name = "lp87565", 90 .of_match_table = of_lp87565_match_table, 91 }, 92 .probe = lp87565_probe, 93 .id_table = lp87565_id_table, 94 }; 95 module_i2c_driver(lp87565_driver); 96 97 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 98 MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver"); 99 MODULE_LICENSE("GPL v2"); 100