LXR linux/drivers/input/touchscreen/cyttsp4

   1/*
   2 * cyttsp_i2c.c
   3 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
   4 * For use with Cypress  Txx4xx parts.
   5 * Supported parts include:
   6 * TMA4XX
   7 * TMA1036
   8 *
   9 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
  10 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
  11 * Copyright (C) 2013 Cypress Semiconductor
  12 *
  13 * This program is free software; you can redistribute it and/or
  14 * modify it under the terms of the GNU General Public License
  15 * version 2, and only version 2, as published by the
  16 * Free Software Foundation.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
  24 *
  25 */
  26
  27#include "cyttsp4_core.h"
  28
  29#include <linux/i2c.h>
  30#include <linux/input.h>
  31
  32#define CYTTSP4_I2C_DATA_SIZE   (3 * 256)
  33
  34static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
  35        .bustype        = BUS_I2C,
  36        .write          = cyttsp_i2c_write_block_data,
  37        .read           = cyttsp_i2c_read_block_data,
  38};
  39
  40static int cyttsp4_i2c_probe(struct i2c_client *client,
  41                                      const struct i2c_device_id *id)
  42{
  43        struct cyttsp4 *ts;
  44
  45        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  46                dev_err(&client->dev, "I2C functionality not Supported\n");
  47                return -EIO;
  48        }
  49
  50        ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
  51                          CYTTSP4_I2C_DATA_SIZE);
  52
  53        return PTR_ERR_OR_ZERO(ts);
  54}
  55
  56static int cyttsp4_i2c_remove(struct i2c_client *client)
  57{
  58        struct cyttsp4 *ts = i2c_get_clientdata(client);
  59
  60        cyttsp4_remove(ts);
  61
  62        return 0;
  63}
  64
  65static const struct i2c_device_id cyttsp4_i2c_id[] = {
  66        { CYTTSP4_I2C_NAME, 0 },
  67        { }
  68};
  69MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
  70
  71static struct i2c_driver cyttsp4_i2c_driver = {
  72        .driver = {
  73                .name   = CYTTSP4_I2C_NAME,
  74                .pm     = &cyttsp4_pm_ops,
  75        },
  76        .probe          = cyttsp4_i2c_probe,
  77        .remove         = cyttsp4_i2c_remove,
  78        .id_table       = cyttsp4_i2c_id,
  79};
  80
  81module_i2c_driver(cyttsp4_i2c_driver);
  82
  83MODULE_LICENSE("GPL");
  84MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
  85MODULE_AUTHOR("Cypress");
  86