109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2020 InvenSense, Inc.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/property.h>
|
|
|
|
#include "inv_icm42600.h"
|
|
|
|
static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st)
|
|
{
|
|
unsigned int mask, val;
|
|
int ret;
|
|
|
|
/*
|
|
* setup interface registers
|
|
* This register write to REG_INTF_CONFIG6 enables a spike filter that
|
|
* is impacting the line and can prevent the I2C ACK to be seen by the
|
|
* controller. So we don't test the return value.
|
|
*/
|
|
regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
|
|
INV_ICM42600_INTF_CONFIG6_MASK,
|
|
INV_ICM42600_INTF_CONFIG6_I3C_EN);
|
|
|
|
ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
|
|
INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* set slew rates for I2C and SPI */
|
|
mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |
|
|
INV_ICM42600_DRIVE_CONFIG_SPI_MASK;
|
|
val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) |
|
|
INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS);
|
|
ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG,
|
|
mask, val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* disable SPI bus */
|
|
return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0,
|
|
INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,
|
|
INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS);
|
|
}
|
|
|
|
static int inv_icm42600_probe(struct i2c_client *client)
|
|
{
|
|
const void *match;
|
|
enum inv_icm42600_chip chip;
|
|
struct regmap *regmap;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
|
|
return -ENOTSUPP;
|
|
|
|
match = device_get_match_data(&client->dev);
|
|
if (!match)
|
|
return -EINVAL;
|
|
chip = (uintptr_t)match;
|
|
|
|
regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config);
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
return inv_icm42600_core_probe(regmap, chip, client->irq,
|
|
inv_icm42600_i2c_bus_setup);
|
|
}
|
|
|
|
static const struct of_device_id inv_icm42600_of_matches[] = {
|
|
{
|
|
.compatible = "invensense,icm42600",
|
|
.data = (void *)INV_CHIP_ICM42600,
|
|
}, {
|
|
.compatible = "invensense,icm42602",
|
|
.data = (void *)INV_CHIP_ICM42602,
|
|
}, {
|
|
.compatible = "invensense,icm42605",
|
|
.data = (void *)INV_CHIP_ICM42605,
|
|
}, {
|
|
.compatible = "invensense,icm42622",
|
|
.data = (void *)INV_CHIP_ICM42622,
|
|
}, {
|
|
.compatible = "invensense,icm42631",
|
|
.data = (void *)INV_CHIP_ICM42631,
|
|
},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
|
|
|
|
static struct i2c_driver inv_icm42600_driver = {
|
|
.driver = {
|
|
.name = "inv-icm42600-i2c",
|
|
.of_match_table = inv_icm42600_of_matches,
|
|
.pm = pm_ptr(&inv_icm42600_pm_ops),
|
|
},
|
|
.probe = inv_icm42600_probe,
|
|
};
|
|
module_i2c_driver(inv_icm42600_driver);
|
|
|
|
MODULE_AUTHOR("InvenSense, Inc.");
|
|
MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_IMPORT_NS(IIO_ICM42600);
|