105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2020 InvenSense, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/property.h>
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#include "inv_icm42600.h"
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static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st)
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{
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unsigned int mask, val;
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int ret;
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/*
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* setup interface registers
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* This register write to REG_INTF_CONFIG6 enables a spike filter that
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* is impacting the line and can prevent the I2C ACK to be seen by the
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* controller. So we don't test the return value.
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*/
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regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
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INV_ICM42600_INTF_CONFIG6_MASK,
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INV_ICM42600_INTF_CONFIG6_I3C_EN);
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ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
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INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0);
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if (ret)
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return ret;
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/* set slew rates for I2C and SPI */
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mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |
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INV_ICM42600_DRIVE_CONFIG_SPI_MASK;
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val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) |
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INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS);
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ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG,
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mask, val);
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if (ret)
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return ret;
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/* disable SPI bus */
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return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0,
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INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,
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INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS);
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}
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static int inv_icm42600_probe(struct i2c_client *client)
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{
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const void *match;
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enum inv_icm42600_chip chip;
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struct regmap *regmap;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
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return -ENOTSUPP;
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match = device_get_match_data(&client->dev);
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if (!match)
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return -EINVAL;
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chip = (uintptr_t)match;
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regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return inv_icm42600_core_probe(regmap, chip, client->irq,
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inv_icm42600_i2c_bus_setup);
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}
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static const struct of_device_id inv_icm42600_of_matches[] = {
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{
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.compatible = "invensense,icm42600",
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.data = (void *)INV_CHIP_ICM42600,
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}, {
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.compatible = "invensense,icm42602",
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.data = (void *)INV_CHIP_ICM42602,
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}, {
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.compatible = "invensense,icm42605",
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.data = (void *)INV_CHIP_ICM42605,
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}, {
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.compatible = "invensense,icm42622",
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.data = (void *)INV_CHIP_ICM42622,
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},
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{}
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};
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MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
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static struct i2c_driver inv_icm42600_driver = {
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.driver = {
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.name = "inv-icm42600-i2c",
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.of_match_table = inv_icm42600_of_matches,
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.pm = &inv_icm42600_pm_ops,
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},
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.probe_new = inv_icm42600_probe,
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};
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module_i2c_driver(inv_icm42600_driver);
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MODULE_AUTHOR("InvenSense, Inc.");
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MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver");
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MODULE_LICENSE("GPL");
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