1 /* 2 * Copyright (C) 2015 Intel Corporation Inc. 3 * 4 * This software is licensed under the terms of the GNU General Public 5 * License version 2, as published by the Free Software Foundation, and 6 * may be copied, distributed, and modified under those terms. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 #include <linux/module.h> 14 #include <linux/acpi.h> 15 #include <linux/spi/spi.h> 16 #include <linux/regmap.h> 17 #include <linux/iio/iio.h> 18 #include "inv_mpu_iio.h" 19 20 static const struct regmap_config inv_mpu_regmap_config = { 21 .reg_bits = 8, 22 .val_bits = 8, 23 }; 24 25 static int inv_mpu_i2c_disable(struct iio_dev *indio_dev) 26 { 27 struct inv_mpu6050_state *st = iio_priv(indio_dev); 28 int ret = 0; 29 30 ret = inv_mpu6050_set_power_itg(st, true); 31 if (ret) 32 return ret; 33 34 ret = regmap_write(st->map, INV_MPU6050_REG_USER_CTRL, 35 INV_MPU6050_BIT_I2C_IF_DIS); 36 if (ret) { 37 inv_mpu6050_set_power_itg(st, false); 38 return ret; 39 } 40 41 return inv_mpu6050_set_power_itg(st, false); 42 } 43 44 static int inv_mpu_probe(struct spi_device *spi) 45 { 46 struct regmap *regmap; 47 const struct spi_device_id *spi_id; 48 const struct acpi_device_id *acpi_id; 49 const char *name = NULL; 50 enum inv_devices chip_type; 51 52 if ((spi_id = spi_get_device_id(spi))) { 53 chip_type = (enum inv_devices)spi_id->driver_data; 54 name = spi_id->name; 55 } else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) { 56 chip_type = (enum inv_devices)acpi_id->driver_data; 57 } else { 58 return -ENODEV; 59 } 60 61 regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config); 62 if (IS_ERR(regmap)) { 63 dev_err(&spi->dev, "Failed to register spi regmap %d\n", 64 (int)PTR_ERR(regmap)); 65 return PTR_ERR(regmap); 66 } 67 68 return inv_mpu_core_probe(regmap, spi->irq, name, 69 inv_mpu_i2c_disable, chip_type); 70 } 71 72 static int inv_mpu_remove(struct spi_device *spi) 73 { 74 return inv_mpu_core_remove(&spi->dev); 75 } 76 77 /* 78 * device id table is used to identify what device can be 79 * supported by this driver 80 */ 81 static const struct spi_device_id inv_mpu_id[] = { 82 {"mpu6000", INV_MPU6000}, 83 {"mpu6500", INV_MPU6500}, 84 {"mpu9150", INV_MPU9150}, 85 {"mpu9250", INV_MPU9250}, 86 {"icm20608", INV_ICM20608}, 87 {} 88 }; 89 90 MODULE_DEVICE_TABLE(spi, inv_mpu_id); 91 92 static const struct acpi_device_id inv_acpi_match[] = { 93 {"INVN6000", INV_MPU6000}, 94 { }, 95 }; 96 MODULE_DEVICE_TABLE(acpi, inv_acpi_match); 97 98 static struct spi_driver inv_mpu_driver = { 99 .probe = inv_mpu_probe, 100 .remove = inv_mpu_remove, 101 .id_table = inv_mpu_id, 102 .driver = { 103 .acpi_match_table = ACPI_PTR(inv_acpi_match), 104 .name = "inv-mpu6000-spi", 105 .pm = &inv_mpu_pmops, 106 }, 107 }; 108 109 module_spi_driver(inv_mpu_driver); 110 111 MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>"); 112 MODULE_DESCRIPTION("Invensense device MPU6000 driver"); 113 MODULE_LICENSE("GPL"); 114