inv_icm42600_spi.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright (C) 2020 InvenSense, Inc.
  4 */
  5
  6#include <linux/kernel.h>
  7#include <linux/device.h>
  8#include <linux/module.h>
  9#include <linux/mod_devicetable.h>
 10#include <linux/spi/spi.h>
 11#include <linux/regmap.h>
 12#include <linux/property.h>
 13
 14#include "inv_icm42600.h"
 15
 16static int inv_icm42600_spi_bus_setup(struct inv_icm42600_state *st)
 17{
 18	unsigned int mask, val;
 19	int ret;
 20
 21	/* setup interface registers */
 22	val = INV_ICM42600_INTF_CONFIG6_I3C_EN |
 23	      INV_ICM42600_INTF_CONFIG6_I3C_SDR_EN |
 24	      INV_ICM42600_INTF_CONFIG6_I3C_DDR_EN;
 25	ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
 26				 INV_ICM42600_INTF_CONFIG6_MASK, val);
 27	if (ret)
 28		return ret;
 29
 30	ret = regmap_clear_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
 31				INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY);
 32	if (ret)
 33		return ret;
 34
 35	/* set slew rates for I2C and SPI */
 36	mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |
 37	       INV_ICM42600_DRIVE_CONFIG_SPI_MASK;
 38	val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_20_60NS) |
 39	      INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_INF_2NS);
 40	ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG,
 41				 mask, val);
 42	if (ret)
 43		return ret;
 44
 45	/* disable i2c bus */
 46	return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0,
 47				  INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,
 48				  INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS);
 49}
 50
 51static int inv_icm42600_probe(struct spi_device *spi)
 52{
 53	const void *match;
 54	enum inv_icm42600_chip chip;
 55	struct regmap *regmap;
 56
 57	match = device_get_match_data(&spi->dev);
 58	if (!match)
 59		return -EINVAL;
 60	chip = (uintptr_t)match;
 61
 62	/* use SPI specific regmap */
 63	regmap = devm_regmap_init_spi(spi, &inv_icm42600_spi_regmap_config);
 64	if (IS_ERR(regmap))
 65		return PTR_ERR(regmap);
 66
 67	return inv_icm42600_core_probe(regmap, chip, inv_icm42600_spi_bus_setup);
 68}
 69
 70/*
 71 * device id table is used to identify what device can be
 72 * supported by this driver
 73 */
 74static const struct spi_device_id inv_icm42600_id[] = {
 75	{ "icm42600", INV_CHIP_ICM42600 },
 76	{ "icm42602", INV_CHIP_ICM42602 },
 77	{ "icm42605", INV_CHIP_ICM42605 },
 78	{ "icm42686", INV_CHIP_ICM42686 },
 79	{ "icm42622", INV_CHIP_ICM42622 },
 80	{ "icm42688", INV_CHIP_ICM42688 },
 81	{ "icm42631", INV_CHIP_ICM42631 },
 82	{ }
 83};
 84MODULE_DEVICE_TABLE(spi, inv_icm42600_id);
 85
 86static const struct of_device_id inv_icm42600_of_matches[] = {
 87	{
 88		.compatible = "invensense,icm42600",
 89		.data = (void *)INV_CHIP_ICM42600,
 90	}, {
 91		.compatible = "invensense,icm42602",
 92		.data = (void *)INV_CHIP_ICM42602,
 93	}, {
 94		.compatible = "invensense,icm42605",
 95		.data = (void *)INV_CHIP_ICM42605,
 96	}, {
 97		.compatible = "invensense,icm42686",
 98		.data = (void *)INV_CHIP_ICM42686,
 99	}, {
100		.compatible = "invensense,icm42622",
101		.data = (void *)INV_CHIP_ICM42622,
102	}, {
103		.compatible = "invensense,icm42688",
104		.data = (void *)INV_CHIP_ICM42688,
105	}, {
106		.compatible = "invensense,icm42631",
107		.data = (void *)INV_CHIP_ICM42631,
108	},
109	{ }
110};
111MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
112
113static struct spi_driver inv_icm42600_driver = {
114	.driver = {
115		.name = "inv-icm42600-spi",
116		.of_match_table = inv_icm42600_of_matches,
117		.pm = pm_ptr(&inv_icm42600_pm_ops),
118	},
119	.id_table = inv_icm42600_id,
120	.probe = inv_icm42600_probe,
121};
122module_spi_driver(inv_icm42600_driver);
123
124MODULE_AUTHOR("InvenSense, Inc.");
125MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver");
126MODULE_LICENSE("GPL");
127MODULE_IMPORT_NS("IIO_ICM42600");