kernel/drivers/iio/accel/bmc150-accel-i2c.c

   1 /*
   2  * 3-axis accelerometer driver supporting following I2C Bosch-Sensortec chips:
   3  *  - BMC150
   4  *  - BMI055
   5  *  - BMA255
   6  *  - BMA250E
   7  *  - BMA222E
   8  *  - BMA280
   9  *
  10  * Copyright (c) 2014, Intel Corporation.
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms and conditions of the GNU General Public License,
  14  * version 2, as published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  * more details.
  20  */
  21
  22 #include <linux/device.h>
  23 #include <linux/mod_devicetable.h>
  24 #include <linux/i2c.h>
  25 #include <linux/module.h>
  26 #include <linux/acpi.h>
  27 #include <linux/regmap.h>
  28
  29 #include "bmc150-accel.h"
  30
  31 static const struct regmap_config bmc150_i2c_regmap_conf = {
  32         .reg_bits = 8,
  33         .val_bits = 8,
  34 };
  35
  36 static int bmc150_accel_probe(struct i2c_client *client,
  37                               const struct i2c_device_id *id)
  38 {
  39         struct regmap *regmap;
  40         const char *name = NULL;
  41         bool block_supported =
  42                 i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
  43                 i2c_check_functionality(client->adapter,
  44                                         I2C_FUNC_SMBUS_READ_I2C_BLOCK);
  45
  46         regmap = devm_regmap_init_i2c(client, &bmc150_i2c_regmap_conf);
  47         if (IS_ERR(regmap)) {
  48                 dev_err(&client->dev, "Failed to initialize i2c regmap\n");
  49                 return PTR_ERR(regmap);
  50         }
  51
  52         if (id)
  53                 name = id->name;
  54
  55         return bmc150_accel_core_probe(&client->dev, regmap, client->irq, name,
  56                                        block_supported);
  57 }
  58
  59 static int bmc150_accel_remove(struct i2c_client *client)
  60 {
  61         return bmc150_accel_core_remove(&client->dev);
  62 }
  63
  64 static const struct acpi_device_id bmc150_accel_acpi_match[] = {
  65         {"BSBA0150",    bmc150},
  66         {"BMC150A",     bmc150},
  67         {"BMI055A",     bmi055},
  68         {"BMA0255",     bma255},
  69         {"BMA250E",     bma250e},
  70         {"BMA222E",     bma222e},
  71         {"BMA0280",     bma280},
  72         { },
  73 };
  74 MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
  75
  76 static const struct i2c_device_id bmc150_accel_id[] = {
  77         {"bmc150_accel",        bmc150},
  78         {"bmi055_accel",        bmi055},
  79         {"bma255",              bma255},
  80         {"bma250e",             bma250e},
  81         {"bma222e",             bma222e},
  82         {"bma280",              bma280},
  83         {}
  84 };
  85
  86 MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
  87
  88 static struct i2c_driver bmc150_accel_driver = {
  89         .driver = {
  90                 .name   = "bmc150_accel_i2c",
  91                 .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
  92                 .pm     = &bmc150_accel_pm_ops,
  93         },
  94         .probe          = bmc150_accel_probe,
  95         .remove         = bmc150_accel_remove,
  96         .id_table       = bmc150_accel_id,
  97 };
  98 module_i2c_driver(bmc150_accel_driver);
  99
 100 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
 101 MODULE_LICENSE("GPL v2");
 102 MODULE_DESCRIPTION("BMC150 I2C accelerometer driver");