1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 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/module.h> 11 #include <linux/of_device.h> 12 #include <linux/regmap.h> 13 14 #include <linux/mfd/lp873x.h> 15 16 static const struct regmap_config lp873x_regmap_config = { 17 .reg_bits = 8, 18 .val_bits = 8, 19 .max_register = LP873X_REG_MAX, 20 }; 21 22 static const struct mfd_cell lp873x_cells[] = { 23 { .name = "lp873x-regulator", }, 24 { .name = "lp873x-gpio", }, 25 }; 26 27 static 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 63 static const struct of_device_id of_lp873x_match_table[] = { 64 { .compatible = "ti,lp8733", }, 65 { .compatible = "ti,lp8732", }, 66 {} 67 }; 68 MODULE_DEVICE_TABLE(of, of_lp873x_match_table); 69 70 static const struct i2c_device_id lp873x_id_table[] = { 71 { "lp873x", 0 }, 72 { }, 73 }; 74 MODULE_DEVICE_TABLE(i2c, lp873x_id_table); 75 76 static 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 }; 84 module_i2c_driver(lp873x_driver); 85 86 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 87 MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver"); 88 MODULE_LICENSE("GPL v2"); 89