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// SPDX-License-Identifier: GPL-2.0
/*
* Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus.
*
* Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
*/
#include <linux/module.h>
#include <linux/spi/spi.h>
#include "rm3100.h"
static const struct regmap_config rm3100_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.rd_table = &rm3100_readable_table,
.wr_table = &rm3100_writable_table,
.volatile_table = &rm3100_volatile_table,
.read_flag_mask = 0x80,
.cache_type = REGCACHE_RBTREE,
};
static int rm3100_probe(struct spi_device *spi)
{
struct regmap *regmap;
int ret;
/* Actually this device supports both mode 0 and mode 3. */
spi->mode = SPI_MODE_0;
/* Data rates cannot exceed 1Mbits. */
spi->max_speed_hz = 1000000;
spi->bits_per_word = 8;
ret = spi_setup(spi);
if (ret)
return ret;
regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return rm3100_common_probe(&spi->dev, regmap, spi->irq);
}
static const struct of_device_id rm3100_dt_match[] = {
{ .compatible = "pni,rm3100", },
{ }
};
MODULE_DEVICE_TABLE(of, rm3100_dt_match);
static struct spi_driver rm3100_driver = {
.driver = {
.name = "rm3100-spi",
.of_match_table = rm3100_dt_match,
},
.probe = rm3100_probe,
};
module_spi_driver(rm3100_driver);
MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver");
MODULE_LICENSE("GPL v2");
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