input/touchscreen/cyttsp_i2c.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * cyttsp_i2c.c
0004  * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
0005  * For use with Cypress Txx3xx parts.
0006  * Supported parts include:
0007  * CY8CTST341
0008  * CY8CTMA340
0009  *
0010  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
0011  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
0012  *
0013  * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
0014  */
0015
0016 #include "cyttsp_core.h"
0017
0018 #include <linux/i2c.h>
0019 #include <linux/input.h>
0020
0021 #define CY_I2C_NAME     "cyttsp-i2c"
0022
0023 #define CY_I2C_DATA_SIZE    128
0024
0025 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
0026     .bustype    = BUS_I2C,
0027     .write      = cyttsp_i2c_write_block_data,
0028     .read           = cyttsp_i2c_read_block_data,
0029 };
0030
0031 static int cyttsp_i2c_probe(struct i2c_client *client,
0032                       const struct i2c_device_id *id)
0033 {
0034     struct cyttsp *ts;
0035
0036     if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
0037         dev_err(&client->dev, "I2C functionality not Supported\n");
0038         return -EIO;
0039     }
0040
0041     ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
0042               CY_I2C_DATA_SIZE);
0043
0044     if (IS_ERR(ts))
0045         return PTR_ERR(ts);
0046
0047     i2c_set_clientdata(client, ts);
0048     return 0;
0049 }
0050
0051 static const struct i2c_device_id cyttsp_i2c_id[] = {
0052     { CY_I2C_NAME, 0 },
0053     { }
0054 };
0055 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
0056
0057 static const struct of_device_id cyttsp_of_i2c_match[] = {
0058     { .compatible = "cypress,cy8ctma340", },
0059     { .compatible = "cypress,cy8ctst341", },
0060     { /* sentinel */ }
0061 };
0062 MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
0063
0064 static struct i2c_driver cyttsp_i2c_driver = {
0065     .driver = {
0066         .name   = CY_I2C_NAME,
0067         .pm = &cyttsp_pm_ops,
0068         .of_match_table = cyttsp_of_i2c_match,
0069     },
0070     .probe      = cyttsp_i2c_probe,
0071     .id_table   = cyttsp_i2c_id,
0072 };
0073
0074 module_i2c_driver(cyttsp_i2c_driver);
0075
0076 MODULE_LICENSE("GPL");
0077 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
0078 MODULE_AUTHOR("Cypress");