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// SPDX-License-Identifier: GPL-2.0-only
/*
* SPI driver for hmc5983
*
* Copyright (C) Josef Gajdusek <atx@atx.name>
*/
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/iio/iio.h>
#include "hmc5843.h"
static const struct regmap_range hmc5843_readable_ranges[] = {
regmap_reg_range(0, HMC5843_ID_END),
};
static const struct regmap_access_table hmc5843_readable_table = {
.yes_ranges = hmc5843_readable_ranges,
.n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
};
static const struct regmap_range hmc5843_writable_ranges[] = {
regmap_reg_range(0, HMC5843_MODE_REG),
};
static const struct regmap_access_table hmc5843_writable_table = {
.yes_ranges = hmc5843_writable_ranges,
.n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
};
static const struct regmap_range hmc5843_volatile_ranges[] = {
regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
};
static const struct regmap_access_table hmc5843_volatile_table = {
.yes_ranges = hmc5843_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
};
static const struct regmap_config hmc5843_spi_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.rd_table = &hmc5843_readable_table,
.wr_table = &hmc5843_writable_table,
.volatile_table = &hmc5843_volatile_table,
/* Autoincrement address pointer */
.read_flag_mask = 0xc0,
.cache_type = REGCACHE_RBTREE,
};
static int hmc5843_spi_probe(struct spi_device *spi)
{
int ret;
struct regmap *regmap;
const struct spi_device_id *id = spi_get_device_id(spi);
spi->mode = SPI_MODE_3;
spi->max_speed_hz = 8000000;
spi->bits_per_word = 8;
ret = spi_setup(spi);
if (ret)
return ret;
regmap = devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return hmc5843_common_probe(&spi->dev,
regmap,
id->driver_data, id->name);
}
static void hmc5843_spi_remove(struct spi_device *spi)
{
hmc5843_common_remove(&spi->dev);
}
static const struct spi_device_id hmc5843_id[] = {
{ "hmc5983", HMC5983_ID },
{ }
};
MODULE_DEVICE_TABLE(spi, hmc5843_id);
static struct spi_driver hmc5843_driver = {
.driver = {
.name = "hmc5843",
.pm = HMC5843_PM_OPS,
},
.id_table = hmc5843_id,
.probe = hmc5843_spi_probe,
.remove = hmc5843_spi_remove,
};
module_spi_driver(hmc5843_driver);
MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
MODULE_DESCRIPTION("HMC5983 SPI driver");
MODULE_LICENSE("GPL");
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