1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus. 4 * 5 * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com> 6 * 7 * i2c slave address: 0x20 + SA1 << 1 + SA0. 8 */ 9 10 #include <linux/i2c.h> 11 #include <linux/module.h> 12 13 #include "rm3100.h" 14 15 static const struct regmap_config rm3100_regmap_config = { 16 .reg_bits = 8, 17 .val_bits = 8, 18 19 .rd_table = &rm3100_readable_table, 20 .wr_table = &rm3100_writable_table, 21 .volatile_table = &rm3100_volatile_table, 22 23 .cache_type = REGCACHE_RBTREE, 24 }; 25 26 static int rm3100_probe(struct i2c_client *client) 27 { 28 struct regmap *regmap; 29 30 regmap = devm_regmap_init_i2c(client, &rm3100_regmap_config); 31 if (IS_ERR(regmap)) 32 return PTR_ERR(regmap); 33 34 return rm3100_common_probe(&client->dev, regmap, client->irq); 35 } 36 37 static const struct of_device_id rm3100_dt_match[] = { 38 { .compatible = "pni,rm3100", }, 39 { } 40 }; 41 MODULE_DEVICE_TABLE(of, rm3100_dt_match); 42 43 static struct i2c_driver rm3100_driver = { 44 .driver = { 45 .name = "rm3100-i2c", 46 .of_match_table = rm3100_dt_match, 47 }, 48 .probe = rm3100_probe, 49 }; 50 module_i2c_driver(rm3100_driver); 51 52 MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>"); 53 MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver"); 54 MODULE_LICENSE("GPL v2"); 55 MODULE_IMPORT_NS(IIO_RM3100); 56