1dc21c7adSKeerthy /* 24f4ed454SAlexander A. Klimov * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/ 3dc21c7adSKeerthy * 4dc21c7adSKeerthy * Author: Keerthy <j-keerthy@ti.com> 5dc21c7adSKeerthy * 6dc21c7adSKeerthy * This program is free software; you can redistribute it and/or 7dc21c7adSKeerthy * modify it under the terms of the GNU General Public License as 8dc21c7adSKeerthy * published by the Free Software Foundation version 2. 9dc21c7adSKeerthy * 10dc21c7adSKeerthy * This program is distributed "as is" WITHOUT ANY WARRANTY of any 11dc21c7adSKeerthy * kind, whether express or implied; without even the implied warranty 12dc21c7adSKeerthy * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13dc21c7adSKeerthy * GNU General Public License for more details. 14dc21c7adSKeerthy */ 15dc21c7adSKeerthy 16dc21c7adSKeerthy #include <linux/interrupt.h> 17dc21c7adSKeerthy #include <linux/mfd/core.h> 18dc21c7adSKeerthy #include <linux/module.h> 19dc21c7adSKeerthy #include <linux/of_device.h> 20dc21c7adSKeerthy #include <linux/regmap.h> 21dc21c7adSKeerthy 22dc21c7adSKeerthy #include <linux/mfd/lp873x.h> 23dc21c7adSKeerthy 24dc21c7adSKeerthy static const struct regmap_config lp873x_regmap_config = { 25dc21c7adSKeerthy .reg_bits = 8, 26dc21c7adSKeerthy .val_bits = 8, 27dc21c7adSKeerthy .max_register = LP873X_REG_MAX, 28dc21c7adSKeerthy }; 29dc21c7adSKeerthy 30dc21c7adSKeerthy static const struct mfd_cell lp873x_cells[] = { 31dc21c7adSKeerthy { .name = "lp873x-regulator", }, 32dc21c7adSKeerthy { .name = "lp873x-gpio", }, 33dc21c7adSKeerthy }; 34dc21c7adSKeerthy 35dc21c7adSKeerthy static int lp873x_probe(struct i2c_client *client, 36dc21c7adSKeerthy const struct i2c_device_id *ids) 37dc21c7adSKeerthy { 38dc21c7adSKeerthy struct lp873x *lp873; 39dc21c7adSKeerthy int ret; 40dc21c7adSKeerthy unsigned int otpid; 41dc21c7adSKeerthy 42dc21c7adSKeerthy lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL); 43dc21c7adSKeerthy if (!lp873) 44dc21c7adSKeerthy return -ENOMEM; 45dc21c7adSKeerthy 46dc21c7adSKeerthy lp873->dev = &client->dev; 47dc21c7adSKeerthy 48dc21c7adSKeerthy lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config); 49dc21c7adSKeerthy if (IS_ERR(lp873->regmap)) { 50dc21c7adSKeerthy ret = PTR_ERR(lp873->regmap); 51dc21c7adSKeerthy dev_err(lp873->dev, 52dc21c7adSKeerthy "Failed to initialize register map: %d\n", ret); 53dc21c7adSKeerthy return ret; 54dc21c7adSKeerthy } 55dc21c7adSKeerthy 56dc21c7adSKeerthy ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid); 57dc21c7adSKeerthy if (ret) { 58dc21c7adSKeerthy dev_err(lp873->dev, "Failed to read OTP ID\n"); 59dc21c7adSKeerthy return ret; 60dc21c7adSKeerthy } 61dc21c7adSKeerthy 62dc21c7adSKeerthy lp873->rev = otpid & LP873X_OTP_REV_OTP_ID; 63dc21c7adSKeerthy 64dc21c7adSKeerthy i2c_set_clientdata(client, lp873); 65dc21c7adSKeerthy 66dc21c7adSKeerthy ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells, 67dc21c7adSKeerthy ARRAY_SIZE(lp873x_cells), NULL, 0, NULL); 68dc21c7adSKeerthy 69dc21c7adSKeerthy return ret; 70dc21c7adSKeerthy } 71dc21c7adSKeerthy 72dc21c7adSKeerthy static const struct of_device_id of_lp873x_match_table[] = { 73dc21c7adSKeerthy { .compatible = "ti,lp8733", }, 74dc21c7adSKeerthy { .compatible = "ti,lp8732", }, 75dc21c7adSKeerthy {} 76dc21c7adSKeerthy }; 77dc21c7adSKeerthy MODULE_DEVICE_TABLE(of, of_lp873x_match_table); 78dc21c7adSKeerthy 79dc21c7adSKeerthy static const struct i2c_device_id lp873x_id_table[] = { 80dc21c7adSKeerthy { "lp873x", 0 }, 81dc21c7adSKeerthy { }, 82dc21c7adSKeerthy }; 83dc21c7adSKeerthy MODULE_DEVICE_TABLE(i2c, lp873x_id_table); 84dc21c7adSKeerthy 85dc21c7adSKeerthy static struct i2c_driver lp873x_driver = { 86dc21c7adSKeerthy .driver = { 87dc21c7adSKeerthy .name = "lp873x", 88dc21c7adSKeerthy .of_match_table = of_lp873x_match_table, 89dc21c7adSKeerthy }, 90dc21c7adSKeerthy .probe = lp873x_probe, 91dc21c7adSKeerthy .id_table = lp873x_id_table, 92dc21c7adSKeerthy }; 93dc21c7adSKeerthy module_i2c_driver(lp873x_driver); 94dc21c7adSKeerthy 95dc21c7adSKeerthy MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 96dc21c7adSKeerthy MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver"); 97dc21c7adSKeerthy MODULE_LICENSE("GPL v2"); 98