hmc5843_i2c.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * i2c driver for hmc5843/5843/5883/5883l/5983
  4 *
  5 * Split from hmc5843.c
  6 * Copyright (C) Josef Gajdusek <atx@atx.name>
  7 */
  8
  9#include <linux/module.h>
 10#include <linux/i2c.h>
 11#include <linux/regmap.h>
 12#include <linux/iio/iio.h>
 13#include <linux/iio/triggered_buffer.h>
 14
 15#include "hmc5843.h"
 16
 17static const struct regmap_range hmc5843_readable_ranges[] = {
 18	regmap_reg_range(0, HMC5843_ID_END),
 19};
 20
 21static const struct regmap_access_table hmc5843_readable_table = {
 22	.yes_ranges = hmc5843_readable_ranges,
 23	.n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
 24};
 25
 26static const struct regmap_range hmc5843_writable_ranges[] = {
 27	regmap_reg_range(0, HMC5843_MODE_REG),
 28};
 29
 30static const struct regmap_access_table hmc5843_writable_table = {
 31	.yes_ranges = hmc5843_writable_ranges,
 32	.n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
 33};
 34
 35static const struct regmap_range hmc5843_volatile_ranges[] = {
 36	regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
 37};
 38
 39static const struct regmap_access_table hmc5843_volatile_table = {
 40	.yes_ranges = hmc5843_volatile_ranges,
 41	.n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
 42};
 43
 44static const struct regmap_config hmc5843_i2c_regmap_config = {
 45	.reg_bits = 8,
 46	.val_bits = 8,
 47
 48	.rd_table = &hmc5843_readable_table,
 49	.wr_table = &hmc5843_writable_table,
 50	.volatile_table = &hmc5843_volatile_table,
 51
 52	.cache_type = REGCACHE_RBTREE,
 53};
 54
 55static int hmc5843_i2c_probe(struct i2c_client *cli)
 56{
 57	const struct i2c_device_id *id = i2c_client_get_device_id(cli);
 58	struct regmap *regmap = devm_regmap_init_i2c(cli,
 59			&hmc5843_i2c_regmap_config);
 60	if (IS_ERR(regmap))
 61		return PTR_ERR(regmap);
 62
 63	return hmc5843_common_probe(&cli->dev,
 64			regmap,
 65			id->driver_data, id->name);
 66}
 67
 68static void hmc5843_i2c_remove(struct i2c_client *client)
 69{
 70	hmc5843_common_remove(&client->dev);
 71}
 72
 73static const struct i2c_device_id hmc5843_id[] = {
 74	{ "hmc5843", HMC5843_ID },
 75	{ "hmc5883", HMC5883_ID },
 76	{ "hmc5883l", HMC5883L_ID },
 77	{ "hmc5983", HMC5983_ID },
 78	{ }
 79};
 80MODULE_DEVICE_TABLE(i2c, hmc5843_id);
 81
 82static const struct of_device_id hmc5843_of_match[] = {
 83	{ .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID },
 84	{ .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID },
 85	{ .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID },
 86	{ .compatible = "honeywell,hmc5983", .data = (void *)HMC5983_ID },
 87	{ }
 88};
 89MODULE_DEVICE_TABLE(of, hmc5843_of_match);
 90
 91static struct i2c_driver hmc5843_driver = {
 92	.driver = {
 93		.name	= "hmc5843",
 94		.pm	= pm_sleep_ptr(&hmc5843_pm_ops),
 95		.of_match_table = hmc5843_of_match,
 96	},
 97	.id_table	= hmc5843_id,
 98	.probe		= hmc5843_i2c_probe,
 99	.remove		= hmc5843_i2c_remove,
100};
101module_i2c_driver(hmc5843_driver);
102
103MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
104MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 i2c driver");
105MODULE_LICENSE("GPL");
106MODULE_IMPORT_NS("IIO_HMC5843");