LXR linux/drivers/input/misc/cma3000_d0x

   1/*
   2 * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
   3 *
   4 * Copyright (C) 2010 Texas Instruments
   5 * Author: Hemanth V <hemanthv@ti.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under the terms of the GNU General Public License version 2 as published by
   9 * the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful, but WITHOUT
  12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14 * more details.
  15 *
  16 * You should have received a copy of the GNU General Public License along with
  17 * this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include <linux/module.h>
  21#include <linux/i2c.h>
  22#include <linux/input/cma3000.h>
  23#include "cma3000_d0x.h"
  24
  25static int cma3000_i2c_set(struct device *dev,
  26                           u8 reg, u8 val, char *msg)
  27{
  28        struct i2c_client *client = to_i2c_client(dev);
  29        int ret;
  30
  31        ret = i2c_smbus_write_byte_data(client, reg, val);
  32        if (ret < 0)
  33                dev_err(&client->dev,
  34                        "%s failed (%s, %d)\n", __func__, msg, ret);
  35        return ret;
  36}
  37
  38static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg)
  39{
  40        struct i2c_client *client = to_i2c_client(dev);
  41        int ret;
  42
  43        ret = i2c_smbus_read_byte_data(client, reg);
  44        if (ret < 0)
  45                dev_err(&client->dev,
  46                        "%s failed (%s, %d)\n", __func__, msg, ret);
  47        return ret;
  48}
  49
  50static const struct cma3000_bus_ops cma3000_i2c_bops = {
  51        .bustype        = BUS_I2C,
  52#define CMA3000_BUSI2C     (0 << 4)
  53        .ctrl_mod       = CMA3000_BUSI2C,
  54        .read           = cma3000_i2c_read,
  55        .write          = cma3000_i2c_set,
  56};
  57
  58static int cma3000_i2c_probe(struct i2c_client *client,
  59                                        const struct i2c_device_id *id)
  60{
  61        struct cma3000_accl_data *data;
  62
  63        data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops);
  64        if (IS_ERR(data))
  65                return PTR_ERR(data);
  66
  67        i2c_set_clientdata(client, data);
  68
  69        return 0;
  70}
  71
  72static int cma3000_i2c_remove(struct i2c_client *client)
  73{
  74        struct cma3000_accl_data *data = i2c_get_clientdata(client);
  75
  76        cma3000_exit(data);
  77
  78        return 0;
  79}
  80
  81#ifdef CONFIG_PM
  82static int cma3000_i2c_suspend(struct device *dev)
  83{
  84        struct i2c_client *client = to_i2c_client(dev);
  85        struct cma3000_accl_data *data = i2c_get_clientdata(client);
  86
  87        cma3000_suspend(data);
  88
  89        return 0;
  90}
  91
  92static int cma3000_i2c_resume(struct device *dev)
  93{
  94        struct i2c_client *client = to_i2c_client(dev);
  95        struct cma3000_accl_data *data = i2c_get_clientdata(client);
  96
  97        cma3000_resume(data);
  98
  99        return 0;
 100}
 101
 102static const struct dev_pm_ops cma3000_i2c_pm_ops = {
 103        .suspend        = cma3000_i2c_suspend,
 104        .resume         = cma3000_i2c_resume,
 105};
 106#endif
 107
 108static const struct i2c_device_id cma3000_i2c_id[] = {
 109        { "cma3000_d01", 0 },
 110        { },
 111};
 112
 113MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
 114
 115static struct i2c_driver cma3000_i2c_driver = {
 116        .probe          = cma3000_i2c_probe,
 117        .remove         = cma3000_i2c_remove,
 118        .id_table       = cma3000_i2c_id,
 119        .driver = {
 120                .name   = "cma3000_i2c_accl",
 121                .owner  = THIS_MODULE,
 122#ifdef CONFIG_PM
 123                .pm     = &cma3000_i2c_pm_ops,
 124#endif
 125        },
 126};
 127
 128module_i2c_driver(cma3000_i2c_driver);
 129
 130MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
 131MODULE_LICENSE("GPL");
 132MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");
 133