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_DATA_SIZE 128 22 23 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = { 24 .bustype = BUS_I2C, 25 .write = cyttsp_i2c_write_block_data, 26 .read = cyttsp_i2c_read_block_data, 27 }; 28 29 static int cyttsp_i2c_probe(struct i2c_client *client, 30 const struct i2c_device_id *id) 31 { 32 struct cyttsp *ts; 33 34 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 35 dev_err(&client->dev, "I2C functionality not Supported\n"); 36 return -EIO; 37 } 38 39 ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq, 40 CY_I2C_DATA_SIZE); 41 42 if (IS_ERR(ts)) 43 return PTR_ERR(ts); 44 45 i2c_set_clientdata(client, ts); 46 return 0; 47 } 48 49 static const struct i2c_device_id cyttsp_i2c_id[] = { 50 { CY_I2C_NAME, 0 }, 51 { } 52 }; 53 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id); 54 55 static struct i2c_driver cyttsp_i2c_driver = { 56 .driver = { 57 .name = CY_I2C_NAME, 58 .pm = &cyttsp_pm_ops, 59 }, 60 .probe = cyttsp_i2c_probe, 61 .id_table = cyttsp_i2c_id, 62 }; 63 64 module_i2c_driver(cyttsp_i2c_driver); 65 66 MODULE_LICENSE("GPL"); 67 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver"); 68 MODULE_AUTHOR("Cypress"); 69