input/touchscreen/cyttsp4_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  Txx4xx parts.
0006  * Supported parts include:
0007  * TMA4XX
0008  * TMA1036
0009  *
0010  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
0011  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
0012  * Copyright (C) 2013 Cypress Semiconductor
0013  *
0014  * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
0015  */
0016
0017 #include "cyttsp4_core.h"
0018
0019 #include <linux/i2c.h>
0020 #include <linux/input.h>
0021
0022 #define CYTTSP4_I2C_DATA_SIZE   (3 * 256)
0023
0024 static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
0025     .bustype    = BUS_I2C,
0026     .write      = cyttsp_i2c_write_block_data,
0027     .read           = cyttsp_i2c_read_block_data,
0028 };
0029
0030 static int cyttsp4_i2c_probe(struct i2c_client *client,
0031                       const struct i2c_device_id *id)
0032 {
0033     struct cyttsp4 *ts;
0034
0035     if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
0036         dev_err(&client->dev, "I2C functionality not Supported\n");
0037         return -EIO;
0038     }
0039
0040     ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
0041               CYTTSP4_I2C_DATA_SIZE);
0042
0043     return PTR_ERR_OR_ZERO(ts);
0044 }
0045
0046 static int cyttsp4_i2c_remove(struct i2c_client *client)
0047 {
0048     struct cyttsp4 *ts = i2c_get_clientdata(client);
0049
0050     cyttsp4_remove(ts);
0051
0052     return 0;
0053 }
0054
0055 static const struct i2c_device_id cyttsp4_i2c_id[] = {
0056     { CYTTSP4_I2C_NAME, 0 },
0057     { }
0058 };
0059 MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
0060
0061 static struct i2c_driver cyttsp4_i2c_driver = {
0062     .driver = {
0063         .name   = CYTTSP4_I2C_NAME,
0064         .pm = &cyttsp4_pm_ops,
0065     },
0066     .probe      = cyttsp4_i2c_probe,
0067     .remove     = cyttsp4_i2c_remove,
0068     .id_table   = cyttsp4_i2c_id,
0069 };
0070
0071 module_i2c_driver(cyttsp4_i2c_driver);
0072
0073 MODULE_LICENSE("GPL");
0074 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
0075 MODULE_AUTHOR("Cypress");