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121354b2ec
PNI RM3100 is a high resolution, large signal immunity magnetometer,
composed of 3 single sensors and a processing chip with a MagI2C
interface.
Following functions are available:
- Single-shot measurement from
/sys/bus/iio/devices/iio:deviceX/in_magn_{axis}_raw
- Triggerd buffer measurement.
- DRDY pin for data ready trigger.
- Both i2c and spi interface are supported.
- Both interrupt and polling measurement is supported, depends on if
the 'interrupts' in DT is declared.
Signed-off-by: Song Qiang <songqiang1304521@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus.
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*
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* Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
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*
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* i2c slave address: 0x20 + SA1 << 1 + SA0.
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*/
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#include <linux/i2c.h>
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#include <linux/module.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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.cache_type = REGCACHE_RBTREE,
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};
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static int rm3100_probe(struct i2c_client *client)
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{
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(client, &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(&client->dev, regmap, client->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 i2c_driver rm3100_driver = {
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.driver = {
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.name = "rm3100-i2c",
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.of_match_table = rm3100_dt_match,
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},
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.probe_new = rm3100_probe,
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};
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module_i2c_driver(rm3100_driver);
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MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
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MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver");
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MODULE_LICENSE("GPL v2");
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