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 /* use SPI specific regmap */ 63 regmap = devm_regmap_init_spi(spi, &inv_icm42600_spi_regmap_config); 64 if (IS_ERR(regmap)) 65 return PTR_ERR(regmap); 66 67 return inv_icm42600_core_probe(regmap, chip, spi->irq, 68 inv_icm42600_spi_bus_setup); 69 } 70 71 /* 72 * device id table is used to identify what device can be 73 * supported by this driver 74 */ 75 static const struct spi_device_id inv_icm42600_id[] = { 76 { "icm42600", INV_CHIP_ICM42600 }, 77 { "icm42602", INV_CHIP_ICM42602 }, 78 { "icm42605", INV_CHIP_ICM42605 }, 79 { "icm42686", INV_CHIP_ICM42686 }, 80 { "icm42622", INV_CHIP_ICM42622 }, 81 { "icm42688", INV_CHIP_ICM42688 }, 82 { "icm42631", INV_CHIP_ICM42631 }, 83 { } 84 }; 85 MODULE_DEVICE_TABLE(spi, inv_icm42600_id); 86 87 static const struct of_device_id inv_icm42600_of_matches[] = { 88 { 89 .compatible = "invensense,icm42600", 90 .data = (void *)INV_CHIP_ICM42600, 91 }, { 92 .compatible = "invensense,icm42602", 93 .data = (void *)INV_CHIP_ICM42602, 94 }, { 95 .compatible = "invensense,icm42605", 96 .data = (void *)INV_CHIP_ICM42605, 97 }, { 98 .compatible = "invensense,icm42686", 99 .data = (void *)INV_CHIP_ICM42686, 100 }, { 101 .compatible = "invensense,icm42622", 102 .data = (void *)INV_CHIP_ICM42622, 103 }, { 104 .compatible = "invensense,icm42688", 105 .data = (void *)INV_CHIP_ICM42688, 106 }, { 107 .compatible = "invensense,icm42631", 108 .data = (void *)INV_CHIP_ICM42631, 109 }, 110 {} 111 }; 112 MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); 113 114 static struct spi_driver inv_icm42600_driver = { 115 .driver = { 116 .name = "inv-icm42600-spi", 117 .of_match_table = inv_icm42600_of_matches, 118 .pm = pm_ptr(&inv_icm42600_pm_ops), 119 }, 120 .id_table = inv_icm42600_id, 121 .probe = inv_icm42600_probe, 122 }; 123 module_spi_driver(inv_icm42600_driver); 124 125 MODULE_AUTHOR("InvenSense, Inc."); 126 MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver"); 127 MODULE_LICENSE("GPL"); 128 MODULE_IMPORT_NS("IIO_ICM42600"); 129