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_IAM20380: 38 case INV_IAM20680: 39 /* no i2c auxiliary bus on the chip */ 40 return false; 41 case INV_MPU9150: 42 case INV_MPU9250: 43 case INV_MPU9255: 44 if (st->magn_disabled) 45 return true; 46 else 47 return false; 48 default: 49 return true; 50 } 51 } 52 53 static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev) 54 { 55 struct inv_mpu6050_state *st = iio_priv(indio_dev); 56 struct device *dev = indio_dev->dev.parent; 57 struct fwnode_handle *mux_node; 58 int ret; 59 60 /* 61 * MPU9xxx magnetometer support requires to disable i2c auxiliary bus. 62 * To ensure backward compatibility with existing setups, do not disable 63 * i2c auxiliary bus if it used. 64 * Check for i2c-gate node in devicetree and set magnetometer disabled. 65 * Only MPU6500 is supported by ACPI, no need to check. 66 */ 67 switch (st->chip_type) { 68 case INV_MPU9150: 69 case INV_MPU9250: 70 case INV_MPU9255: 71 mux_node = device_get_named_child_node(dev, "i2c-gate"); 72 if (mux_node != NULL) { 73 st->magn_disabled = true; 74 dev_warn(dev, "disable internal use of magnetometer\n"); 75 } 76 fwnode_handle_put(mux_node); 77 break; 78 default: 79 break; 80 } 81 82 /* enable i2c bypass when using i2c auxiliary bus */ 83 if (inv_mpu_i2c_aux_bus(dev)) { 84 ret = regmap_write(st->map, st->reg->int_pin_cfg, 85 st->irq_mask | INV_MPU6050_BIT_BYPASS_EN); 86 if (ret) 87 return ret; 88 } 89 90 return 0; 91 } 92 93 /** 94 * inv_mpu_probe() - probe function. 95 * @client: i2c client. 96 * 97 * Returns 0 on success, a negative error code otherwise. 98 */ 99 static int inv_mpu_probe(struct i2c_client *client) 100 { 101 const struct i2c_device_id *id = i2c_client_get_device_id(client); 102 const void *match; 103 struct inv_mpu6050_state *st; 104 int result; 105 enum inv_devices chip_type; 106 struct regmap *regmap; 107 const char *name; 108 109 if (!i2c_check_functionality(client->adapter, 110 I2C_FUNC_SMBUS_I2C_BLOCK)) 111 return -EOPNOTSUPP; 112 113 match = device_get_match_data(&client->dev); 114 if (match) { 115 chip_type = (uintptr_t)match; 116 name = client->name; 117 } else if (id) { 118 chip_type = (enum inv_devices) 119 id->driver_data; 120 name = id->name; 121 } else { 122 return -ENOSYS; 123 } 124 125 regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config); 126 if (IS_ERR(regmap)) { 127 dev_err(&client->dev, "Failed to register i2c regmap: %pe\n", 128 regmap); 129 return PTR_ERR(regmap); 130 } 131 132 result = inv_mpu_core_probe(regmap, client->irq, name, 133 inv_mpu_i2c_aux_setup, chip_type); 134 if (result < 0) 135 return result; 136 137 st = iio_priv(dev_get_drvdata(&client->dev)); 138 if (inv_mpu_i2c_aux_bus(&client->dev)) { 139 /* declare i2c auxiliary bus */ 140 st->muxc = i2c_mux_alloc(client->adapter, &client->dev, 141 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE, 142 inv_mpu6050_select_bypass, NULL); 143 if (!st->muxc) 144 return -ENOMEM; 145 st->muxc->priv = dev_get_drvdata(&client->dev); 146 result = i2c_mux_add_adapter(st->muxc, 0, 0); 147 if (result) 148 return result; 149 result = inv_mpu_acpi_create_mux_client(client); 150 if (result) 151 goto out_del_mux; 152 } 153 154 return 0; 155 156 out_del_mux: 157 i2c_mux_del_adapters(st->muxc); 158 return result; 159 } 160 161 static void inv_mpu_remove(struct i2c_client *client) 162 { 163 struct iio_dev *indio_dev = i2c_get_clientdata(client); 164 struct inv_mpu6050_state *st = iio_priv(indio_dev); 165 166 if (st->muxc) { 167 inv_mpu_acpi_delete_mux_client(client); 168 i2c_mux_del_adapters(st->muxc); 169 } 170 } 171 172 /* 173 * device id table is used to identify what device can be 174 * supported by this driver 175 */ 176 static const struct i2c_device_id inv_mpu_id[] = { 177 {"mpu6050", INV_MPU6050}, 178 {"mpu6500", INV_MPU6500}, 179 {"mpu6515", INV_MPU6515}, 180 {"mpu6880", INV_MPU6880}, 181 {"mpu9150", INV_MPU9150}, 182 {"mpu9250", INV_MPU9250}, 183 {"mpu9255", INV_MPU9255}, 184 {"icm20608", INV_ICM20608}, 185 {"icm20608d", INV_ICM20608D}, 186 {"icm20609", INV_ICM20609}, 187 {"icm20689", INV_ICM20689}, 188 {"icm20600", INV_ICM20600}, 189 {"icm20602", INV_ICM20602}, 190 {"icm20690", INV_ICM20690}, 191 {"iam20380", INV_IAM20380}, 192 {"iam20680", INV_IAM20680}, 193 {"iam20680hp", INV_IAM20680HP}, 194 {"iam20680ht", INV_IAM20680HT}, 195 {} 196 }; 197 198 MODULE_DEVICE_TABLE(i2c, inv_mpu_id); 199 200 static const struct of_device_id inv_of_match[] = { 201 { 202 .compatible = "invensense,mpu6050", 203 .data = (void *)INV_MPU6050 204 }, 205 { 206 .compatible = "invensense,mpu6500", 207 .data = (void *)INV_MPU6500 208 }, 209 { 210 .compatible = "invensense,mpu6515", 211 .data = (void *)INV_MPU6515 212 }, 213 { 214 .compatible = "invensense,mpu6880", 215 .data = (void *)INV_MPU6880 216 }, 217 { 218 .compatible = "invensense,mpu9150", 219 .data = (void *)INV_MPU9150 220 }, 221 { 222 .compatible = "invensense,mpu9250", 223 .data = (void *)INV_MPU9250 224 }, 225 { 226 .compatible = "invensense,mpu9255", 227 .data = (void *)INV_MPU9255 228 }, 229 { 230 .compatible = "invensense,icm20608", 231 .data = (void *)INV_ICM20608 232 }, 233 { 234 .compatible = "invensense,icm20608d", 235 .data = (void *)INV_ICM20608D 236 }, 237 { 238 .compatible = "invensense,icm20609", 239 .data = (void *)INV_ICM20609 240 }, 241 { 242 .compatible = "invensense,icm20689", 243 .data = (void *)INV_ICM20689 244 }, 245 { 246 .compatible = "invensense,icm20600", 247 .data = (void *)INV_ICM20600 248 }, 249 { 250 .compatible = "invensense,icm20602", 251 .data = (void *)INV_ICM20602 252 }, 253 { 254 .compatible = "invensense,icm20690", 255 .data = (void *)INV_ICM20690 256 }, 257 { 258 .compatible = "invensense,iam20380", 259 .data = (void *)INV_IAM20380 260 }, 261 { 262 .compatible = "invensense,iam20680", 263 .data = (void *)INV_IAM20680 264 }, 265 { 266 .compatible = "invensense,iam20680hp", 267 .data = (void *)INV_IAM20680HP 268 }, 269 { 270 .compatible = "invensense,iam20680ht", 271 .data = (void *)INV_IAM20680HT 272 }, 273 { } 274 }; 275 MODULE_DEVICE_TABLE(of, inv_of_match); 276 277 static const struct acpi_device_id inv_acpi_match[] = { 278 {"INVN6500", INV_MPU6500}, 279 { }, 280 }; 281 MODULE_DEVICE_TABLE(acpi, inv_acpi_match); 282 283 static struct i2c_driver inv_mpu_driver = { 284 .probe = inv_mpu_probe, 285 .remove = inv_mpu_remove, 286 .id_table = inv_mpu_id, 287 .driver = { 288 .of_match_table = inv_of_match, 289 .acpi_match_table = inv_acpi_match, 290 .name = "inv-mpu6050-i2c", 291 .pm = pm_ptr(&inv_mpu_pmops), 292 }, 293 }; 294 295 module_i2c_driver(inv_mpu_driver); 296 297 MODULE_AUTHOR("Invensense Corporation"); 298 MODULE_DESCRIPTION("Invensense device MPU6050 driver"); 299 MODULE_LICENSE("GPL"); 300 MODULE_IMPORT_NS("IIO_MPU6050"); 301