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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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/i2c.h>11#include <linux/regmap.h>12#include <linux/property.h>13 14#include "inv_icm42600.h"15 16static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st)17{18 unsigned int mask, val;19 int ret;20 21 /*22 * setup interface registers23 * This register write to REG_INTF_CONFIG6 enables a spike filter that24 * is impacting the line and can prevent the I2C ACK to be seen by the25 * controller. So we don't test the return value.26 */27 regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,28 INV_ICM42600_INTF_CONFIG6_MASK,29 INV_ICM42600_INTF_CONFIG6_I3C_EN);30 31 ret = regmap_clear_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,32 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY);33 if (ret)34 return ret;35 36 /* set slew rates for I2C and SPI */37 mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |38 INV_ICM42600_DRIVE_CONFIG_SPI_MASK;39 val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) |40 INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS);41 ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG,42 mask, val);43 if (ret)44 return ret;45 46 /* disable SPI bus */47 return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0,48 INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,49 INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS);50}51 52static int inv_icm42600_probe(struct i2c_client *client)53{54 const void *match;55 enum inv_icm42600_chip chip;56 struct regmap *regmap;57 58 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))59 return -ENOTSUPP;60 61 match = device_get_match_data(&client->dev);62 if (!match)63 return -EINVAL;64 chip = (uintptr_t)match;65 66 regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config);67 if (IS_ERR(regmap))68 return PTR_ERR(regmap);69 70 return inv_icm42600_core_probe(regmap, chip, client->irq,71 inv_icm42600_i2c_bus_setup);72}73 74static const struct of_device_id inv_icm42600_of_matches[] = {75 {76 .compatible = "invensense,icm42600",77 .data = (void *)INV_CHIP_ICM42600,78 }, {79 .compatible = "invensense,icm42602",80 .data = (void *)INV_CHIP_ICM42602,81 }, {82 .compatible = "invensense,icm42605",83 .data = (void *)INV_CHIP_ICM42605,84 }, {85 .compatible = "invensense,icm42686",86 .data = (void *)INV_CHIP_ICM42686,87 }, {88 .compatible = "invensense,icm42622",89 .data = (void *)INV_CHIP_ICM42622,90 }, {91 .compatible = "invensense,icm42688",92 .data = (void *)INV_CHIP_ICM42688,93 }, {94 .compatible = "invensense,icm42631",95 .data = (void *)INV_CHIP_ICM42631,96 },97 {}98};99MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);100 101static struct i2c_driver inv_icm42600_driver = {102 .driver = {103 .name = "inv-icm42600-i2c",104 .of_match_table = inv_icm42600_of_matches,105 .pm = pm_ptr(&inv_icm42600_pm_ops),106 },107 .probe = inv_icm42600_probe,108};109module_i2c_driver(inv_icm42600_driver);110 111MODULE_AUTHOR("InvenSense, Inc.");112MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver");113MODULE_LICENSE("GPL");114MODULE_IMPORT_NS(IIO_ICM42600);115