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 st->chip_config.user_ctrl |= INV_MPU6050_BIT_I2C_IF_DIS; 35 ret = regmap_write(st->map, st->reg->user_ctrl, 36 st->chip_config.user_ctrl); 37 if (ret) { 38 inv_mpu6050_set_power_itg(st, false); 39 return ret; 40 } 41 42 return inv_mpu6050_set_power_itg(st, false); 43 } 44 45 static int inv_mpu_probe(struct spi_device *spi) 46 { 47 struct regmap *regmap; 48 const struct spi_device_id *spi_id; 49 const struct acpi_device_id *acpi_id; 50 const char *name = NULL; 51 enum inv_devices chip_type; 52 53 if ((spi_id = spi_get_device_id(spi))) { 54 chip_type = (enum inv_devices)spi_id->driver_data; 55 name = spi_id->name; 56 } else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) { 57 chip_type = (enum inv_devices)acpi_id->driver_data; 58 } else { 59 return -ENODEV; 60 } 61 62 regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config); 63 if (IS_ERR(regmap)) { 64 dev_err(&spi->dev, "Failed to register spi regmap %d\n", 65 (int)PTR_ERR(regmap)); 66 return PTR_ERR(regmap); 67 } 68 69 return inv_mpu_core_probe(regmap, spi->irq, name, 70 inv_mpu_i2c_disable, chip_type); 71 } 72 73 /* 74 * device id table is used to identify what device can be 75 * supported by this driver 76 */ 77 static const struct spi_device_id inv_mpu_id[] = { 78 {"mpu6000", INV_MPU6000}, 79 {"mpu6500", INV_MPU6500}, 80 {"mpu9150", INV_MPU9150}, 81 {"mpu9250", INV_MPU9250}, 82 {"mpu9255", INV_MPU9255}, 83 {"icm20608", INV_ICM20608}, 84 {} 85 }; 86 87 MODULE_DEVICE_TABLE(spi, inv_mpu_id); 88 89 static const struct acpi_device_id inv_acpi_match[] = { 90 {"INVN6000", INV_MPU6000}, 91 { }, 92 }; 93 MODULE_DEVICE_TABLE(acpi, inv_acpi_match); 94 95 static struct spi_driver inv_mpu_driver = { 96 .probe = inv_mpu_probe, 97 .id_table = inv_mpu_id, 98 .driver = { 99 .acpi_match_table = ACPI_PTR(inv_acpi_match), 100 .name = "inv-mpu6000-spi", 101 .pm = &inv_mpu_pmops, 102 }, 103 }; 104 105 module_spi_driver(inv_mpu_driver); 106 107 MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>"); 108 MODULE_DESCRIPTION("Invensense device MPU6000 driver"); 109 MODULE_LICENSE("GPL"); 110