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 16 static 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_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4, 31 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0); 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 51 static 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 = (enum inv_icm42600_chip)match; 61 62 regmap = devm_regmap_init_spi(spi, &inv_icm42600_regmap_config); 63 if (IS_ERR(regmap)) 64 return PTR_ERR(regmap); 65 66 return inv_icm42600_core_probe(regmap, chip, spi->irq, 67 inv_icm42600_spi_bus_setup); 68 } 69 70 static const struct of_device_id inv_icm42600_of_matches[] = { 71 { 72 .compatible = "invensense,icm42600", 73 .data = (void *)INV_CHIP_ICM42600, 74 }, { 75 .compatible = "invensense,icm42602", 76 .data = (void *)INV_CHIP_ICM42602, 77 }, { 78 .compatible = "invensense,icm42605", 79 .data = (void *)INV_CHIP_ICM42605, 80 }, { 81 .compatible = "invensense,icm42622", 82 .data = (void *)INV_CHIP_ICM42622, 83 }, 84 {} 85 }; 86 MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); 87 88 static struct spi_driver inv_icm42600_driver = { 89 .driver = { 90 .name = "inv-icm42600-spi", 91 .of_match_table = inv_icm42600_of_matches, 92 .pm = &inv_icm42600_pm_ops, 93 }, 94 .probe = inv_icm42600_probe, 95 }; 96 module_spi_driver(inv_icm42600_driver); 97 98 MODULE_AUTHOR("InvenSense, Inc."); 99 MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver"); 100 MODULE_LICENSE("GPL"); 101