LXR linux/drivers/input/touchscreen/cyttsp

   1/*
   2 * cyttsp_i2c.c
   3 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
   4 * For use with Cypress Txx3xx parts.
   5 * Supported parts include:
   6 * CY8CTST341
   7 * CY8CTMA340
   8 *
   9 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
  10 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License
  14 * version 2, and only version 2, as published by the
  15 * Free Software Foundation.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
  23 *
  24 */
  25
  26#include "cyttsp_core.h"
  27
  28#include <linux/i2c.h>
  29#include <linux/input.h>
  30
  31#define CY_I2C_DATA_SIZE        128
  32
  33static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
  34        .bustype        = BUS_I2C,
  35        .write          = cyttsp_i2c_write_block_data,
  36        .read           = cyttsp_i2c_read_block_data,
  37};
  38
  39static int cyttsp_i2c_probe(struct i2c_client *client,
  40                                      const struct i2c_device_id *id)
  41{
  42        struct cyttsp *ts;
  43
  44        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  45                dev_err(&client->dev, "I2C functionality not Supported\n");
  46                return -EIO;
  47        }
  48
  49        ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
  50                          CY_I2C_DATA_SIZE);
  51
  52        if (IS_ERR(ts))
  53                return PTR_ERR(ts);
  54
  55        i2c_set_clientdata(client, ts);
  56        return 0;
  57}
  58
  59static const struct i2c_device_id cyttsp_i2c_id[] = {
  60        { CY_I2C_NAME, 0 },
  61        { }
  62};
  63MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
  64
  65static struct i2c_driver cyttsp_i2c_driver = {
  66        .driver = {
  67                .name   = CY_I2C_NAME,
  68                .pm     = &cyttsp_pm_ops,
  69        },
  70        .probe          = cyttsp_i2c_probe,
  71        .id_table       = cyttsp_i2c_id,
  72};
  73
  74module_i2c_driver(cyttsp_i2c_driver);
  75
  76MODULE_LICENSE("GPL");
  77MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
  78MODULE_AUTHOR("Cypress");
  79