drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c

   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");