1 /* 2 * STMicroelectronics uvis25 i2c driver 3 * 4 * Copyright 2017 STMicroelectronics Inc. 5 * 6 * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> 7 * 8 * Licensed under the GPL-2. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/acpi.h> 14 #include <linux/i2c.h> 15 #include <linux/slab.h> 16 #include <linux/regmap.h> 17 18 #include "st_uvis25.h" 19 20 #define UVIS25_I2C_AUTO_INCREMENT BIT(7) 21 22 static const struct regmap_config st_uvis25_i2c_regmap_config = { 23 .reg_bits = 8, 24 .val_bits = 8, 25 .write_flag_mask = UVIS25_I2C_AUTO_INCREMENT, 26 .read_flag_mask = UVIS25_I2C_AUTO_INCREMENT, 27 }; 28 29 static int st_uvis25_i2c_probe(struct i2c_client *client, 30 const struct i2c_device_id *id) 31 { 32 struct regmap *regmap; 33 34 regmap = devm_regmap_init_i2c(client, &st_uvis25_i2c_regmap_config); 35 if (IS_ERR(regmap)) { 36 dev_err(&client->dev, "Failed to register i2c regmap %d\n", 37 (int)PTR_ERR(regmap)); 38 return PTR_ERR(regmap); 39 } 40 41 return st_uvis25_probe(&client->dev, client->irq, regmap); 42 } 43 44 static const struct of_device_id st_uvis25_i2c_of_match[] = { 45 { .compatible = "st,uvis25", }, 46 {}, 47 }; 48 MODULE_DEVICE_TABLE(of, st_uvis25_i2c_of_match); 49 50 static const struct i2c_device_id st_uvis25_i2c_id_table[] = { 51 { ST_UVIS25_DEV_NAME }, 52 {}, 53 }; 54 MODULE_DEVICE_TABLE(i2c, st_uvis25_i2c_id_table); 55 56 static struct i2c_driver st_uvis25_driver = { 57 .driver = { 58 .name = "st_uvis25_i2c", 59 .pm = &st_uvis25_pm_ops, 60 .of_match_table = of_match_ptr(st_uvis25_i2c_of_match), 61 }, 62 .probe = st_uvis25_i2c_probe, 63 .id_table = st_uvis25_i2c_id_table, 64 }; 65 module_i2c_driver(st_uvis25_driver); 66 67 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>"); 68 MODULE_DESCRIPTION("STMicroelectronics uvis25 i2c driver"); 69 MODULE_LICENSE("GPL v2"); 70