1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Invensense, Inc. 4 */ 5 6 #include <linux/delay.h> 7 #include <linux/err.h> 8 #include <linux/i2c.h> 9 #include <linux/iio/iio.h> 10 #include <linux/mod_devicetable.h> 11 #include <linux/module.h> 12 #include <linux/property.h> 13 14 #include "inv_mpu_iio.h" 15 16 static const struct regmap_config inv_mpu_regmap_config = { 17 .reg_bits = 8, 18 .val_bits = 8, 19 }; 20 21 static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id) 22 { 23 return 0; 24 } 25 26 static bool inv_mpu_i2c_aux_bus(struct device *dev) 27 { 28 struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev)); 29 30 switch (st->chip_type) { 31 case INV_ICM20608: 32 case INV_ICM20608D: 33 case INV_ICM20609: 34 case INV_ICM20689: 35 case INV_ICM20600: 36 case INV_ICM20602: 37 case INV_IAM20680: 38 /* no i2c auxiliary bus on the chip */ 39 return false; 40 case INV_MPU9150: 41 case INV_MPU9250: 42 case INV_MPU9255: 43 if (st->magn_disabled) 44 return true; 45 else 46 return false; 47 default: 48 return true; 49 } 50 } 51 52 static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev) 53 { 54 struct inv_mpu6050_state *st = iio_priv(indio_dev); 55 struct device *dev = indio_dev->dev.parent; 56 struct fwnode_handle *mux_node; 57 int ret; 58 59 /* 60 * MPU9xxx magnetometer support requires to disable i2c auxiliary bus. 61 * To ensure backward compatibility with existing setups, do not disable 62 * i2c auxiliary bus if it used. 63 * Check for i2c-gate node in devicetree and set magnetometer disabled. 64 * Only MPU6500 is supported by ACPI, no need to check. 65 */ 66 switch (st->chip_type) { 67 case INV_MPU9150: 68 case INV_MPU9250: 69 case INV_MPU9255: 70 mux_node = device_get_named_child_node(dev, "i2c-gate"); 71 if (mux_node != NULL) { 72 st->magn_disabled = true; 73 dev_warn(dev, "disable internal use of magnetometer\n"); 74 } 75 fwnode_handle_put(mux_node); 76 break; 77 default: 78 break; 79 } 80 81 /* enable i2c bypass when using i2c auxiliary bus */ 82 if (inv_mpu_i2c_aux_bus(dev)) { 83 ret = regmap_write(st->map, st->reg->int_pin_cfg, 84 st->irq_mask | INV_MPU6050_BIT_BYPASS_EN); 85 if (ret) 86 return ret; 87 } 88 89 return 0; 90 } 91 92 /** 93 * inv_mpu_probe() - probe function. 94 * @client: i2c client. 95 * 96 * Returns 0 on success, a negative error code otherwise. 97 */ 98 static int inv_mpu_probe(struct i2c_client *client) 99 { 100 const struct i2c_device_id *id = i2c_client_get_device_id(client); 101 const void *match; 102 struct inv_mpu6050_state *st; 103 int result; 104 enum inv_devices chip_type; 105 struct regmap *regmap; 106 const char *name; 107 108 if (!i2c_check_functionality(client->adapter, 109 I2C_FUNC_SMBUS_I2C_BLOCK)) 110 return -EOPNOTSUPP; 111 112 match = device_get_match_data(&client->dev); 113 if (match) { 114 chip_type = (uintptr_t)match; 115 name = client->name; 116 } else if (id) { 117 chip_type = (enum inv_devices) 118 id->driver_data; 119 name = id->name; 120 } else { 121 return -ENOSYS; 122 } 123 124 regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config); 125 if (IS_ERR(regmap)) { 126 dev_err(&client->dev, "Failed to register i2c regmap: %pe\n", 127 regmap); 128 return PTR_ERR(regmap); 129 } 130 131 result = inv_mpu_core_probe(regmap, client->irq, name, 132 inv_mpu_i2c_aux_setup, chip_type); 133 if (result < 0) 134 return result; 135 136 st = iio_priv(dev_get_drvdata(&client->dev)); 137 if (inv_mpu_i2c_aux_bus(&client->dev)) { 138 /* declare i2c auxiliary bus */ 139 st->muxc = i2c_mux_alloc(client->adapter, &client->dev, 140 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE, 141 inv_mpu6050_select_bypass, NULL); 142 if (!st->muxc) 143 return -ENOMEM; 144 st->muxc->priv = dev_get_drvdata(&client->dev); 145 result = i2c_mux_add_adapter(st->muxc, 0, 0); 146 if (result) 147 return result; 148 result = inv_mpu_acpi_create_mux_client(client); 149 if (result) 150 goto out_del_mux; 151 } 152 153 return 0; 154 155 out_del_mux: 156 i2c_mux_del_adapters(st->muxc); 157 return result; 158 } 159 160 static void inv_mpu_remove(struct i2c_client *client) 161 { 162 struct iio_dev *indio_dev = i2c_get_clientdata(client); 163 struct inv_mpu6050_state *st = iio_priv(indio_dev); 164 165 if (st->muxc) { 166 inv_mpu_acpi_delete_mux_client(client); 167 i2c_mux_del_adapters(st->muxc); 168 } 169 } 170 171 /* 172 * device id table is used to identify what device can be 173 * supported by this driver 174 */ 175 static const struct i2c_device_id inv_mpu_id[] = { 176 {"mpu6050", INV_MPU6050}, 177 {"mpu6500", INV_MPU6500}, 178 {"mpu6515", INV_MPU6515}, 179 {"mpu6880", INV_MPU6880}, 180 {"mpu9150", INV_MPU9150}, 181 {"mpu9250", INV_MPU9250}, 182 {"mpu9255", INV_MPU9255}, 183 {"icm20608", INV_ICM20608}, 184 {"icm20608d", INV_ICM20608D}, 185 {"icm20609", INV_ICM20609}, 186 {"icm20689", INV_ICM20689}, 187 {"icm20600", INV_ICM20600}, 188 {"icm20602", INV_ICM20602}, 189 {"icm20690", INV_ICM20690}, 190 {"iam20680", INV_IAM20680}, 191 {"iam20680hp", INV_IAM20680HP}, 192 {"iam20680ht", INV_IAM20680HT}, 193 {} 194 }; 195 196 MODULE_DEVICE_TABLE(i2c, inv_mpu_id); 197 198 static const struct of_device_id inv_of_match[] = { 199 { 200 .compatible = "invensense,mpu6050", 201 .data = (void *)INV_MPU6050 202 }, 203 { 204 .compatible = "invensense,mpu6500", 205 .data = (void *)INV_MPU6500 206 }, 207 { 208 .compatible = "invensense,mpu6515", 209 .data = (void *)INV_MPU6515 210 }, 211 { 212 .compatible = "invensense,mpu6880", 213 .data = (void *)INV_MPU6880 214 }, 215 { 216 .compatible = "invensense,mpu9150", 217 .data = (void *)INV_MPU9150 218 }, 219 { 220 .compatible = "invensense,mpu9250", 221 .data = (void *)INV_MPU9250 222 }, 223 { 224 .compatible = "invensense,mpu9255", 225 .data = (void *)INV_MPU9255 226 }, 227 { 228 .compatible = "invensense,icm20608", 229 .data = (void *)INV_ICM20608 230 }, 231 { 232 .compatible = "invensense,icm20608d", 233 .data = (void *)INV_ICM20608D 234 }, 235 { 236 .compatible = "invensense,icm20609", 237 .data = (void *)INV_ICM20609 238 }, 239 { 240 .compatible = "invensense,icm20689", 241 .data = (void *)INV_ICM20689 242 }, 243 { 244 .compatible = "invensense,icm20600", 245 .data = (void *)INV_ICM20600 246 }, 247 { 248 .compatible = "invensense,icm20602", 249 .data = (void *)INV_ICM20602 250 }, 251 { 252 .compatible = "invensense,icm20690", 253 .data = (void *)INV_ICM20690 254 }, 255 { 256 .compatible = "invensense,iam20680", 257 .data = (void *)INV_IAM20680 258 }, 259 { 260 .compatible = "invensense,iam20680hp", 261 .data = (void *)INV_IAM20680HP 262 }, 263 { 264 .compatible = "invensense,iam20680ht", 265 .data = (void *)INV_IAM20680HT 266 }, 267 { } 268 }; 269 MODULE_DEVICE_TABLE(of, inv_of_match); 270 271 static const struct acpi_device_id inv_acpi_match[] = { 272 {"INVN6500", INV_MPU6500}, 273 { }, 274 }; 275 MODULE_DEVICE_TABLE(acpi, inv_acpi_match); 276 277 static struct i2c_driver inv_mpu_driver = { 278 .probe = inv_mpu_probe, 279 .remove = inv_mpu_remove, 280 .id_table = inv_mpu_id, 281 .driver = { 282 .of_match_table = inv_of_match, 283 .acpi_match_table = inv_acpi_match, 284 .name = "inv-mpu6050-i2c", 285 .pm = pm_ptr(&inv_mpu_pmops), 286 }, 287 }; 288 289 module_i2c_driver(inv_mpu_driver); 290 291 MODULE_AUTHOR("Invensense Corporation"); 292 MODULE_DESCRIPTION("Invensense device MPU6050 driver"); 293 MODULE_LICENSE("GPL"); 294 MODULE_IMPORT_NS(IIO_MPU6050); 295