LXR linux/drivers/iio/imu/inv_mpu6050/inv_mpu

   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
  20static const struct regmap_config inv_mpu_regmap_config = {
  21        .reg_bits = 8,
  22        .val_bits = 8,
  23};
  24
  25static 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
  44static 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
  72static 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 */
  81static 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
  90MODULE_DEVICE_TABLE(spi, inv_mpu_id);
  91
  92static const struct acpi_device_id inv_acpi_match[] = {
  93        {"INVN6000", INV_MPU6000},
  94        { },
  95};
  96MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
  97
  98static 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
 109module_spi_driver(inv_mpu_driver);
 110
 111MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
 112MODULE_DESCRIPTION("Invensense device MPU6000 driver");
 113MODULE_LICENSE("GPL");
 114