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/i2c.h> 11 #include <linux/regmap.h> 12 #include <linux/property.h> 13 14 #include "inv_icm42600.h" 15 16 static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st) 17 { 18 unsigned int mask, val; 19 int ret; 20 21 /* setup interface registers */ 22 ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6, 23 INV_ICM42600_INTF_CONFIG6_MASK, 24 INV_ICM42600_INTF_CONFIG6_I3C_EN); 25 if (ret) 26 return ret; 27 28 ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4, 29 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0); 30 if (ret) 31 return ret; 32 33 /* set slew rates for I2C and SPI */ 34 mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK | 35 INV_ICM42600_DRIVE_CONFIG_SPI_MASK; 36 val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) | 37 INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS); 38 ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG, 39 mask, val); 40 if (ret) 41 return ret; 42 43 /* disable SPI bus */ 44 return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0, 45 INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK, 46 INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS); 47 } 48 49 static int inv_icm42600_probe(struct i2c_client *client) 50 { 51 const void *match; 52 enum inv_icm42600_chip chip; 53 struct regmap *regmap; 54 55 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) 56 return -ENOTSUPP; 57 58 match = device_get_match_data(&client->dev); 59 if (!match) 60 return -EINVAL; 61 chip = (enum inv_icm42600_chip)match; 62 63 regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config); 64 if (IS_ERR(regmap)) 65 return PTR_ERR(regmap); 66 67 return inv_icm42600_core_probe(regmap, chip, client->irq, 68 inv_icm42600_i2c_bus_setup); 69 } 70 71 static const struct of_device_id inv_icm42600_of_matches[] = { 72 { 73 .compatible = "invensense,icm42600", 74 .data = (void *)INV_CHIP_ICM42600, 75 }, { 76 .compatible = "invensense,icm42602", 77 .data = (void *)INV_CHIP_ICM42602, 78 }, { 79 .compatible = "invensense,icm42605", 80 .data = (void *)INV_CHIP_ICM42605, 81 }, { 82 .compatible = "invensense,icm42622", 83 .data = (void *)INV_CHIP_ICM42622, 84 }, 85 {} 86 }; 87 MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); 88 89 static struct i2c_driver inv_icm42600_driver = { 90 .driver = { 91 .name = "inv-icm42600-i2c", 92 .of_match_table = inv_icm42600_of_matches, 93 .pm = &inv_icm42600_pm_ops, 94 }, 95 .probe_new = inv_icm42600_probe, 96 }; 97 module_i2c_driver(inv_icm42600_driver); 98 99 MODULE_AUTHOR("InvenSense, Inc."); 100 MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver"); 101 MODULE_LICENSE("GPL"); 102