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_clear_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4, 31 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY); 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 = (uintptr_t)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 /* 71 * device id table is used to identify what device can be 72 * supported by this driver 73 */ 74 static const struct spi_device_id inv_icm42600_id[] = { 75 { "icm42600", INV_CHIP_ICM42600 }, 76 { "icm42602", INV_CHIP_ICM42602 }, 77 { "icm42605", INV_CHIP_ICM42605 }, 78 { "icm42686", INV_CHIP_ICM42686 }, 79 { "icm42622", INV_CHIP_ICM42622 }, 80 { "icm42688", INV_CHIP_ICM42688 }, 81 { "icm42631", INV_CHIP_ICM42631 }, 82 { } 83 }; 84 MODULE_DEVICE_TABLE(spi, inv_icm42600_id); 85 86 static const struct of_device_id inv_icm42600_of_matches[] = { 87 { 88 .compatible = "invensense,icm42600", 89 .data = (void *)INV_CHIP_ICM42600, 90 }, { 91 .compatible = "invensense,icm42602", 92 .data = (void *)INV_CHIP_ICM42602, 93 }, { 94 .compatible = "invensense,icm42605", 95 .data = (void *)INV_CHIP_ICM42605, 96 }, { 97 .compatible = "invensense,icm42686", 98 .data = (void *)INV_CHIP_ICM42686, 99 }, { 100 .compatible = "invensense,icm42622", 101 .data = (void *)INV_CHIP_ICM42622, 102 }, { 103 .compatible = "invensense,icm42688", 104 .data = (void *)INV_CHIP_ICM42688, 105 }, { 106 .compatible = "invensense,icm42631", 107 .data = (void *)INV_CHIP_ICM42631, 108 }, 109 {} 110 }; 111 MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); 112 113 static struct spi_driver inv_icm42600_driver = { 114 .driver = { 115 .name = "inv-icm42600-spi", 116 .of_match_table = inv_icm42600_of_matches, 117 .pm = pm_ptr(&inv_icm42600_pm_ops), 118 }, 119 .id_table = inv_icm42600_id, 120 .probe = inv_icm42600_probe, 121 }; 122 module_spi_driver(inv_icm42600_driver); 123 124 MODULE_AUTHOR("InvenSense, Inc."); 125 MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver"); 126 MODULE_LICENSE("GPL"); 127 MODULE_IMPORT_NS("IIO_ICM42600"); 128