1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * TSC2004 touchscreen driver 4 * 5 * Copyright (C) 2015 QWERTY Embedded Design 6 * Copyright (C) 2015 EMAC Inc. 7 */ 8 9 #include <linux/module.h> 10 #include <linux/input.h> 11 #include <linux/of.h> 12 #include <linux/i2c.h> 13 #include <linux/regmap.h> 14 #include "tsc200x-core.h" 15 16 static const struct input_id tsc2004_input_id = { 17 .bustype = BUS_I2C, 18 .product = 2004, 19 }; 20 21 static int tsc2004_cmd(struct device *dev, u8 cmd) 22 { 23 u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd; 24 s32 data; 25 struct i2c_client *i2c = to_i2c_client(dev); 26 27 data = i2c_smbus_write_byte(i2c, tx); 28 if (data < 0) { 29 dev_err(dev, "%s: failed, command: %x i2c error: %d\n", 30 __func__, cmd, data); 31 return data; 32 } 33 34 return 0; 35 } 36 37 static int tsc2004_probe(struct i2c_client *i2c, 38 const struct i2c_device_id *id) 39 40 { 41 return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id, 42 devm_regmap_init_i2c(i2c, &tsc200x_regmap_config), 43 tsc2004_cmd); 44 } 45 46 static void tsc2004_remove(struct i2c_client *i2c) 47 { 48 tsc200x_remove(&i2c->dev); 49 } 50 51 static const struct i2c_device_id tsc2004_idtable[] = { 52 { "tsc2004", 0 }, 53 { } 54 }; 55 MODULE_DEVICE_TABLE(i2c, tsc2004_idtable); 56 57 #ifdef CONFIG_OF 58 static const struct of_device_id tsc2004_of_match[] = { 59 { .compatible = "ti,tsc2004" }, 60 { /* sentinel */ } 61 }; 62 MODULE_DEVICE_TABLE(of, tsc2004_of_match); 63 #endif 64 65 static struct i2c_driver tsc2004_driver = { 66 .driver = { 67 .name = "tsc2004", 68 .of_match_table = of_match_ptr(tsc2004_of_match), 69 .pm = &tsc200x_pm_ops, 70 }, 71 .id_table = tsc2004_idtable, 72 .probe = tsc2004_probe, 73 .remove = tsc2004_remove, 74 }; 75 module_i2c_driver(tsc2004_driver); 76 77 MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>"); 78 MODULE_DESCRIPTION("TSC2004 Touchscreen Driver"); 79 MODULE_LICENSE("GPL"); 80