drivers/input/touchscreen/cyttsp4_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  Txx4xx parts.
   6  * Supported parts include:
   7  * TMA4XX
   8  * TMA1036
   9  *
  10  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
  11  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
  12  * Copyright (C) 2013 Cypress Semiconductor
  13  *
  14  * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
  15  */
  16
  17 #include "cyttsp4_core.h"
  18
  19 #include <linux/i2c.h>
  20 #include <linux/input.h>
  21
  22 #define CYTTSP4_I2C_DATA_SIZE   (3 * 256)
  23
  24 static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
  25         .bustype        = BUS_I2C,
  26         .write          = cyttsp_i2c_write_block_data,
  27         .read           = cyttsp_i2c_read_block_data,
  28 };
  29
  30 static int cyttsp4_i2c_probe(struct i2c_client *client,
  31                                       const struct i2c_device_id *id)
  32 {
  33         struct cyttsp4 *ts;
  34
  35         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  36                 dev_err(&client->dev, "I2C functionality not Supported\n");
  37                 return -EIO;
  38         }
  39
  40         ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
  41                           CYTTSP4_I2C_DATA_SIZE);
  42
  43         return PTR_ERR_OR_ZERO(ts);
  44 }
  45
  46 static int cyttsp4_i2c_remove(struct i2c_client *client)
  47 {
  48         struct cyttsp4 *ts = i2c_get_clientdata(client);
  49
  50         cyttsp4_remove(ts);
  51
  52         return 0;
  53 }
  54
  55 static const struct i2c_device_id cyttsp4_i2c_id[] = {
  56         { CYTTSP4_I2C_NAME, 0 },
  57         { }
  58 };
  59 MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
  60
  61 static struct i2c_driver cyttsp4_i2c_driver = {
  62         .driver = {
  63                 .name   = CYTTSP4_I2C_NAME,
  64                 .pm     = &cyttsp4_pm_ops,
  65         },
  66         .probe          = cyttsp4_i2c_probe,
  67         .remove         = cyttsp4_i2c_remove,
  68         .id_table       = cyttsp4_i2c_id,
  69 };
  70
  71 module_i2c_driver(cyttsp4_i2c_driver);
  72
  73 MODULE_LICENSE("GPL");
  74 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
  75 MODULE_AUTHOR("Cypress");