| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* |
| 3 | * Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus. |
| 4 | * |
| 5 | * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com> |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/spi/spi.h> |
| 10 | |
| 11 | #include "rm3100.h" |
| 12 | |
| 13 | static const struct regmap_config rm3100_regmap_config = { |
| 14 | .reg_bits = 8, |
| 15 | .val_bits = 8, |
| 16 | |
| 17 | .rd_table = &rm3100_readable_table, |
| 18 | .wr_table = &rm3100_writable_table, |
| 19 | .volatile_table = &rm3100_volatile_table, |
| 20 | |
| 21 | .read_flag_mask = 0x80, |
| 22 | |
| 23 | .cache_type = REGCACHE_RBTREE, |
| 24 | }; |
| 25 | |
| 26 | static int rm3100_probe(struct spi_device *spi) |
| 27 | { |
| 28 | struct regmap *regmap; |
| 29 | int ret; |
| 30 | |
| 31 | /* Actually this device supports both mode 0 and mode 3. */ |
| 32 | spi->mode = SPI_MODE_0; |
| 33 | /* Data rates cannot exceed 1Mbits. */ |
| 34 | spi->max_speed_hz = 1000000; |
| 35 | ret = spi_setup(spi); |
| 36 | if (ret) |
| 37 | return ret; |
| 38 | |
| 39 | regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config); |
| 40 | if (IS_ERR(ptr: regmap)) |
| 41 | return PTR_ERR(ptr: regmap); |
| 42 | |
| 43 | return rm3100_common_probe(dev: &spi->dev, regmap, irq: spi->irq); |
| 44 | } |
| 45 | |
| 46 | static const struct of_device_id rm3100_dt_match[] = { |
| 47 | { .compatible = "pni,rm3100", }, |
| 48 | { } |
| 49 | }; |
| 50 | MODULE_DEVICE_TABLE(of, rm3100_dt_match); |
| 51 | |
| 52 | static struct spi_driver rm3100_driver = { |
| 53 | .driver = { |
| 54 | .name = "rm3100-spi", |
| 55 | .of_match_table = rm3100_dt_match, |
| 56 | }, |
| 57 | .probe = rm3100_probe, |
| 58 | }; |
| 59 | module_spi_driver(rm3100_driver); |
| 60 | |
| 61 | MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>"); |
| 62 | MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver"); |
| 63 | MODULE_LICENSE("GPL v2"); |
| 64 | MODULE_IMPORT_NS("IIO_RM3100"); |
| 65 |