drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3 * Copyright (C) 2015 Intel Corporation Inc.
   4 */
   5 #include <linux/module.h>
   6 #include <linux/acpi.h>
   7 #include <linux/spi/spi.h>
   8 #include <linux/regmap.h>
   9 #include <linux/iio/iio.h>
  10 #include "inv_mpu_iio.h"
  11
  12 static const struct regmap_config inv_mpu_regmap_config = {
  13         .reg_bits = 8,
  14         .val_bits = 8,
  15 };
  16
  17 static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
  18 {
  19         struct inv_mpu6050_state *st = iio_priv(indio_dev);
  20         int ret = 0;
  21
  22         ret = inv_mpu6050_set_power_itg(st, true);
  23         if (ret)
  24                 return ret;
  25
  26         if (st->reg->i2c_if) {
  27                 ret = regmap_write(st->map, st->reg->i2c_if,
  28                                    INV_ICM20602_BIT_I2C_IF_DIS);
  29         } else {
  30                 st->chip_config.user_ctrl |= INV_MPU6050_BIT_I2C_IF_DIS;
  31                 ret = regmap_write(st->map, st->reg->user_ctrl,
  32                                    st->chip_config.user_ctrl);
  33         }
  34         if (ret) {
  35                 inv_mpu6050_set_power_itg(st, false);
  36                 return ret;
  37         }
  38
  39         return inv_mpu6050_set_power_itg(st, false);
  40 }
  41
  42 static int inv_mpu_probe(struct spi_device *spi)
  43 {
  44         struct regmap *regmap;
  45         const struct spi_device_id *spi_id;
  46         const struct acpi_device_id *acpi_id;
  47         const char *name = NULL;
  48         enum inv_devices chip_type;
  49
  50         if ((spi_id = spi_get_device_id(spi))) {
  51                 chip_type = (enum inv_devices)spi_id->driver_data;
  52                 name = spi_id->name;
  53         } else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) {
  54                 chip_type = (enum inv_devices)acpi_id->driver_data;
  55         } else {
  56                 return -ENODEV;
  57         }
  58
  59         regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
  60         if (IS_ERR(regmap)) {
  61                 dev_err(&spi->dev, "Failed to register spi regmap %d\n",
  62                         (int)PTR_ERR(regmap));
  63                 return PTR_ERR(regmap);
  64         }
  65
  66         return inv_mpu_core_probe(regmap, spi->irq, name,
  67                                   inv_mpu_i2c_disable, chip_type);
  68 }
  69
  70 /*
  71  * device id table is used to identify what device can be
  72  * supported by this driver
  73  */
  74 static const struct spi_device_id inv_mpu_id[] = {
  75         {"mpu6000", INV_MPU6000},
  76         {"mpu6500", INV_MPU6500},
  77         {"mpu9150", INV_MPU9150},
  78         {"mpu9250", INV_MPU9250},
  79         {"mpu9255", INV_MPU9255},
  80         {"icm20608", INV_ICM20608},
  81         {"icm20602", INV_ICM20602},
  82         {}
  83 };
  84
  85 MODULE_DEVICE_TABLE(spi, inv_mpu_id);
  86
  87 static const struct acpi_device_id inv_acpi_match[] = {
  88         {"INVN6000", INV_MPU6000},
  89         { },
  90 };
  91 MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
  92
  93 static struct spi_driver inv_mpu_driver = {
  94         .probe          =       inv_mpu_probe,
  95         .id_table       =       inv_mpu_id,
  96         .driver = {
  97                 .acpi_match_table = ACPI_PTR(inv_acpi_match),
  98                 .name   =       "inv-mpu6000-spi",
  99                 .pm     =       &inv_mpu_pmops,
 100         },
 101 };
 102
 103 module_spi_driver(inv_mpu_driver);
 104
 105 MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
 106 MODULE_DESCRIPTION("Invensense device MPU6000 driver");
 107 MODULE_LICENSE("GPL");