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_NAME "cyttsp-i2c" 22 23 #define CY_I2C_DATA_SIZE 128 24 25 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = { 26 .bustype = BUS_I2C, 27 .write = cyttsp_i2c_write_block_data, 28 .read = cyttsp_i2c_read_block_data, 29 }; 30 31 static int cyttsp_i2c_probe(struct i2c_client *client) 32 { 33 struct cyttsp *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 = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq, 41 CY_I2C_DATA_SIZE); 42 43 if (IS_ERR(ts)) 44 return PTR_ERR(ts); 45 46 i2c_set_clientdata(client, ts); 47 return 0; 48 } 49 50 static const struct i2c_device_id cyttsp_i2c_id[] = { 51 { CY_I2C_NAME, 0 }, 52 { } 53 }; 54 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id); 55 56 static const struct of_device_id cyttsp_of_i2c_match[] = { 57 { .compatible = "cypress,cy8ctma340", }, 58 { .compatible = "cypress,cy8ctst341", }, 59 { /* sentinel */ } 60 }; 61 MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match); 62 63 static struct i2c_driver cyttsp_i2c_driver = { 64 .driver = { 65 .name = CY_I2C_NAME, 66 .pm = pm_sleep_ptr(&cyttsp_pm_ops), 67 .of_match_table = cyttsp_of_i2c_match, 68 }, 69 .probe = cyttsp_i2c_probe, 70 .id_table = cyttsp_i2c_id, 71 }; 72 73 module_i2c_driver(cyttsp_i2c_driver); 74 75 MODULE_LICENSE("GPL"); 76 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver"); 77 MODULE_AUTHOR("Cypress"); 78