1 /* 2 * cyttsp_i2c.c 3 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver. 4 * For use with Cypress Txx3xx parts. 5 * Supported parts include: 6 * CY8CTST341 7 * CY8CTMA340 8 * 9 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc. 10 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org> 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * version 2, and only version 2, as published by the 15 * Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com> 23 * 24 */ 25 26 #include "cyttsp_core.h" 27 28 #include <linux/i2c.h> 29 #include <linux/input.h> 30 31 #define CY_I2C_DATA_SIZE 128 32 33 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = { 34 .bustype = BUS_I2C, 35 .write = cyttsp_i2c_write_block_data, 36 .read = cyttsp_i2c_read_block_data, 37 }; 38 39 static int cyttsp_i2c_probe(struct i2c_client *client, 40 const struct i2c_device_id *id) 41 { 42 struct cyttsp *ts; 43 44 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 45 dev_err(&client->dev, "I2C functionality not Supported\n"); 46 return -EIO; 47 } 48 49 ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq, 50 CY_I2C_DATA_SIZE); 51 52 if (IS_ERR(ts)) 53 return PTR_ERR(ts); 54 55 i2c_set_clientdata(client, ts); 56 return 0; 57 } 58 59 static const struct i2c_device_id cyttsp_i2c_id[] = { 60 { CY_I2C_NAME, 0 }, 61 { } 62 }; 63 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id); 64 65 static struct i2c_driver cyttsp_i2c_driver = { 66 .driver = { 67 .name = CY_I2C_NAME, 68 .pm = &cyttsp_pm_ops, 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"); 79