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64 lines
1.4 KiB
64 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus. |
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* |
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* Copyright (C) 2018 Song Qiang <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/spi/spi.h> |
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#include "rm3100.h" |
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static const struct regmap_config rm3100_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.rd_table = &rm3100_readable_table, |
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.wr_table = &rm3100_writable_table, |
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.volatile_table = &rm3100_volatile_table, |
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.read_flag_mask = 0x80, |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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static int rm3100_probe(struct spi_device *spi) |
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{ |
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struct regmap *regmap; |
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int ret; |
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/* Actually this device supports both mode 0 and mode 3. */ |
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spi->mode = SPI_MODE_0; |
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/* Data rates cannot exceed 1Mbits. */ |
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spi->max_speed_hz = 1000000; |
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spi->bits_per_word = 8; |
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ret = spi_setup(spi); |
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if (ret) |
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return ret; |
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regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config); |
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if (IS_ERR(regmap)) |
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return PTR_ERR(regmap); |
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return rm3100_common_probe(&spi->dev, regmap, spi->irq); |
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} |
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static const struct of_device_id rm3100_dt_match[] = { |
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{ .compatible = "pni,rm3100", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, rm3100_dt_match); |
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static struct spi_driver rm3100_driver = { |
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.driver = { |
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.name = "rm3100-spi", |
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.of_match_table = rm3100_dt_match, |
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}, |
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.probe = rm3100_probe, |
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}; |
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module_spi_driver(rm3100_driver); |
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MODULE_AUTHOR("Song Qiang <[email protected]>"); |
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MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver"); |
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MODULE_LICENSE("GPL v2");
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