162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus. 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com> 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <linux/module.h> 962306a36Sopenharmony_ci#include <linux/spi/spi.h> 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci#include "rm3100.h" 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistatic const struct regmap_config rm3100_regmap_config = { 1462306a36Sopenharmony_ci .reg_bits = 8, 1562306a36Sopenharmony_ci .val_bits = 8, 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci .rd_table = &rm3100_readable_table, 1862306a36Sopenharmony_ci .wr_table = &rm3100_writable_table, 1962306a36Sopenharmony_ci .volatile_table = &rm3100_volatile_table, 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci .read_flag_mask = 0x80, 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci .cache_type = REGCACHE_RBTREE, 2462306a36Sopenharmony_ci}; 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_cistatic int rm3100_probe(struct spi_device *spi) 2762306a36Sopenharmony_ci{ 2862306a36Sopenharmony_ci struct regmap *regmap; 2962306a36Sopenharmony_ci int ret; 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci /* Actually this device supports both mode 0 and mode 3. */ 3262306a36Sopenharmony_ci spi->mode = SPI_MODE_0; 3362306a36Sopenharmony_ci /* Data rates cannot exceed 1Mbits. */ 3462306a36Sopenharmony_ci spi->max_speed_hz = 1000000; 3562306a36Sopenharmony_ci spi->bits_per_word = 8; 3662306a36Sopenharmony_ci ret = spi_setup(spi); 3762306a36Sopenharmony_ci if (ret) 3862306a36Sopenharmony_ci return ret; 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config); 4162306a36Sopenharmony_ci if (IS_ERR(regmap)) 4262306a36Sopenharmony_ci return PTR_ERR(regmap); 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci return rm3100_common_probe(&spi->dev, regmap, spi->irq); 4562306a36Sopenharmony_ci} 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_cistatic const struct of_device_id rm3100_dt_match[] = { 4862306a36Sopenharmony_ci { .compatible = "pni,rm3100", }, 4962306a36Sopenharmony_ci { } 5062306a36Sopenharmony_ci}; 5162306a36Sopenharmony_ciMODULE_DEVICE_TABLE(of, rm3100_dt_match); 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_cistatic struct spi_driver rm3100_driver = { 5462306a36Sopenharmony_ci .driver = { 5562306a36Sopenharmony_ci .name = "rm3100-spi", 5662306a36Sopenharmony_ci .of_match_table = rm3100_dt_match, 5762306a36Sopenharmony_ci }, 5862306a36Sopenharmony_ci .probe = rm3100_probe, 5962306a36Sopenharmony_ci}; 6062306a36Sopenharmony_cimodule_spi_driver(rm3100_driver); 6162306a36Sopenharmony_ci 6262306a36Sopenharmony_ciMODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>"); 6362306a36Sopenharmony_ciMODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver"); 6462306a36Sopenharmony_ciMODULE_LICENSE("GPL v2"); 6562306a36Sopenharmony_ciMODULE_IMPORT_NS(IIO_RM3100); 66