// 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/spi/spi.h> #include <linux/regmap.h> #include <linux/property.h> #include "inv_icm42600.h" static int inv_icm42600_spi_bus_setup(struct inv_icm42600_state *st) { unsigned int mask, val; int ret; /* setup interface registers */ val = INV_ICM42600_INTF_CONFIG6_I3C_EN | INV_ICM42600_INTF_CONFIG6_I3C_SDR_EN | INV_ICM42600_INTF_CONFIG6_I3C_DDR_EN; ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6, INV_ICM42600_INTF_CONFIG6_MASK, val); if (ret) return ret; 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_20_60NS) | INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_INF_2NS); ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG, mask, val); if (ret) return ret; /* disable i2c 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_I2C_DIS); } static int inv_icm42600_probe(struct spi_device *spi) { const void *match; enum inv_icm42600_chip chip; struct regmap *regmap; match = device_get_match_data(&spi->dev); if (!match) return -EINVAL; chip = (uintptr_t)match; regmap = devm_regmap_init_spi(spi, &inv_icm42600_regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); return inv_icm42600_core_probe(regmap, chip, spi->irq, inv_icm42600_spi_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 spi_driver inv_icm42600_driver = { .driver = { .name = "inv-icm42600-spi", .of_match_table = inv_icm42600_of_matches, .pm = pm_ptr(&inv_icm42600_pm_ops), }, .probe = inv_icm42600_probe, }; module_spi_driver(inv_icm42600_driver); MODULE_AUTHOR("InvenSense, Inc."); MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS(IIO_ICM42600);