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         if (st->reg->i2c_if) {
  35                 ret = regmap_write(st->map, st->reg->i2c_if,
  36                                    INV_ICM20602_BIT_I2C_IF_DIS);
  37         } else {
  38                 st->chip_config.user_ctrl |= INV_MPU6050_BIT_I2C_IF_DIS;
  39                 ret = regmap_write(st->map, st->reg->user_ctrl,
  40                                    st->chip_config.user_ctrl);
  41         }
  42         if (ret) {
  43                 inv_mpu6050_set_power_itg(st, false);
  44                 return ret;
  45         }
  46
  47         return inv_mpu6050_set_power_itg(st, false);
  48 }
  49
  50 static int inv_mpu_probe(struct spi_device *spi)
  51 {
  52         struct regmap *regmap;
  53         const struct spi_device_id *spi_id;
  54         const struct acpi_device_id *acpi_id;
  55         const char *name = NULL;
  56         enum inv_devices chip_type;
  57
  58         if ((spi_id = spi_get_device_id(spi))) {
  59                 chip_type = (enum inv_devices)spi_id->driver_data;
  60                 name = spi_id->name;
  61         } else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) {
  62                 chip_type = (enum inv_devices)acpi_id->driver_data;
  63         } else {
  64                 return -ENODEV;
  65         }
  66
  67         regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
  68         if (IS_ERR(regmap)) {
  69                 dev_err(&spi->dev, "Failed to register spi regmap %d\n",
  70                         (int)PTR_ERR(regmap));
  71                 return PTR_ERR(regmap);
  72         }
  73
  74         return inv_mpu_core_probe(regmap, spi->irq, name,
  75                                   inv_mpu_i2c_disable, chip_type);
  76 }
  77
  78 /*
  79  * device id table is used to identify what device can be
  80  * supported by this driver
  81  */
  82 static const struct spi_device_id inv_mpu_id[] = {
  83         {"mpu6000", INV_MPU6000},
  84         {"mpu6500", INV_MPU6500},
  85         {"mpu9150", INV_MPU9150},
  86         {"mpu9250", INV_MPU9250},
  87         {"mpu9255", INV_MPU9255},
  88         {"icm20608", INV_ICM20608},
  89         {"icm20602", INV_ICM20602},
  90         {}
  91 };
  92
  93 MODULE_DEVICE_TABLE(spi, inv_mpu_id);
  94
  95 static const struct acpi_device_id inv_acpi_match[] = {
  96         {"INVN6000", INV_MPU6000},
  97         { },
  98 };
  99 MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
 100
 101 static struct spi_driver inv_mpu_driver = {
 102         .probe          =       inv_mpu_probe,
 103         .id_table       =       inv_mpu_id,
 104         .driver = {
 105                 .acpi_match_table = ACPI_PTR(inv_acpi_match),
 106                 .name   =       "inv-mpu6000-spi",
 107                 .pm     =       &inv_mpu_pmops,
 108         },
 109 };
 110
 111 module_spi_driver(inv_mpu_driver);
 112
 113 MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
 114 MODULE_DESCRIPTION("Invensense device MPU6000 driver");
 115 MODULE_LICENSE("GPL");