LXR linux/drivers/input/touchscreen/cyttsp

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * cyttsp_i2c.c
   4 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
   5 * For use with Cypress Txx3xx parts.
   6 * Supported parts include:
   7 * CY8CTST341
   8 * CY8CTMA340
   9 *
  10 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
  11 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
  12 *
  13 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
  14 */
  15
  16#include "cyttsp_core.h"
  17
  18#include <linux/i2c.h>
  19#include <linux/input.h>
  20
  21#define CY_I2C_NAME             "cyttsp-i2c"
  22
  23#define CY_I2C_DATA_SIZE        128
  24
  25static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
  26        .bustype        = BUS_I2C,
  27        .write          = cyttsp_i2c_write_block_data,
  28        .read           = cyttsp_i2c_read_block_data,
  29};
  30
  31static int cyttsp_i2c_probe(struct i2c_client *client,
  32                                      const struct i2c_device_id *id)
  33{
  34        struct cyttsp *ts;
  35
  36        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  37                dev_err(&client->dev, "I2C functionality not Supported\n");
  38                return -EIO;
  39        }
  40
  41        ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
  42                          CY_I2C_DATA_SIZE);
  43
  44        if (IS_ERR(ts))
  45                return PTR_ERR(ts);
  46
  47        i2c_set_clientdata(client, ts);
  48        return 0;
  49}
  50
  51static const struct i2c_device_id cyttsp_i2c_id[] = {
  52        { CY_I2C_NAME, 0 },
  53        { }
  54};
  55MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
  56
  57static const struct of_device_id cyttsp_of_i2c_match[] = {
  58        { .compatible = "cypress,cy8ctma340", },
  59        { .compatible = "cypress,cy8ctst341", },
  60        { /* sentinel */ }
  61};
  62MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
  63
  64static struct i2c_driver cyttsp_i2c_driver = {
  65        .driver = {
  66                .name   = CY_I2C_NAME,
  67                .pm     = &cyttsp_pm_ops,
  68                .of_match_table = cyttsp_of_i2c_match,
  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