drivers/input/touchscreen/cyttsp_i2c.c

   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
  25 static 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
  31 static 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
  51 static const struct i2c_device_id cyttsp_i2c_id[] = {
  52         { CY_I2C_NAME, 0 },
  53         { }
  54 };
  55 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
  56
  57 static const struct of_device_id cyttsp_of_i2c_match[] = {
  58         { .compatible = "cypress,cy8ctma340", },
  59         { .compatible = "cypress,cy8ctst341", },
  60         { /* sentinel */ }
  61 };
  62 MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
  63
  64 static 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
  74 module_i2c_driver(cyttsp_i2c_driver);
  75
  76 MODULE_LICENSE("GPL");
  77 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
  78 MODULE_AUTHOR("Cypress");