1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2a748941cSMichael Welling /* 3a748941cSMichael Welling * TSC2004 touchscreen driver 4a748941cSMichael Welling * 5a748941cSMichael Welling * Copyright (C) 2015 QWERTY Embedded Design 6a748941cSMichael Welling * Copyright (C) 2015 EMAC Inc. 7a748941cSMichael Welling */ 8a748941cSMichael Welling 9a748941cSMichael Welling #include <linux/module.h> 10a748941cSMichael Welling #include <linux/input.h> 11a748941cSMichael Welling #include <linux/of.h> 12a748941cSMichael Welling #include <linux/i2c.h> 13a748941cSMichael Welling #include <linux/regmap.h> 14a748941cSMichael Welling #include "tsc200x-core.h" 15a748941cSMichael Welling 16e9003c9cSMichael Welling static const struct input_id tsc2004_input_id = { 17e9003c9cSMichael Welling .bustype = BUS_I2C, 18e9003c9cSMichael Welling .product = 2004, 19e9003c9cSMichael Welling }; 20e9003c9cSMichael Welling 21a748941cSMichael Welling static int tsc2004_cmd(struct device *dev, u8 cmd) 22a748941cSMichael Welling { 23a748941cSMichael Welling u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd; 24a748941cSMichael Welling s32 data; 25a748941cSMichael Welling struct i2c_client *i2c = to_i2c_client(dev); 26a748941cSMichael Welling 27a748941cSMichael Welling data = i2c_smbus_write_byte(i2c, tx); 28a748941cSMichael Welling if (data < 0) { 29a748941cSMichael Welling dev_err(dev, "%s: failed, command: %x i2c error: %d\n", 30a748941cSMichael Welling __func__, cmd, data); 31a748941cSMichael Welling return data; 32a748941cSMichael Welling } 33a748941cSMichael Welling 34a748941cSMichael Welling return 0; 35a748941cSMichael Welling } 36a748941cSMichael Welling 37cd66fd10SUwe Kleine-König static int tsc2004_probe(struct i2c_client *i2c) 38a748941cSMichael Welling 39a748941cSMichael Welling { 40e9003c9cSMichael Welling return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id, 41a748941cSMichael Welling devm_regmap_init_i2c(i2c, &tsc200x_regmap_config), 42a748941cSMichael Welling tsc2004_cmd); 43a748941cSMichael Welling } 44a748941cSMichael Welling 45ed5c2f5fSUwe Kleine-König static void tsc2004_remove(struct i2c_client *i2c) 46a748941cSMichael Welling { 4739e4e75aSUwe Kleine-König tsc200x_remove(&i2c->dev); 48a748941cSMichael Welling } 49a748941cSMichael Welling 50a748941cSMichael Welling static const struct i2c_device_id tsc2004_idtable[] = { 51a748941cSMichael Welling { "tsc2004", 0 }, 52a748941cSMichael Welling { } 53a748941cSMichael Welling }; 54a748941cSMichael Welling MODULE_DEVICE_TABLE(i2c, tsc2004_idtable); 55a748941cSMichael Welling 56a748941cSMichael Welling #ifdef CONFIG_OF 57a748941cSMichael Welling static const struct of_device_id tsc2004_of_match[] = { 58a748941cSMichael Welling { .compatible = "ti,tsc2004" }, 59a748941cSMichael Welling { /* sentinel */ } 60a748941cSMichael Welling }; 61a748941cSMichael Welling MODULE_DEVICE_TABLE(of, tsc2004_of_match); 62a748941cSMichael Welling #endif 63a748941cSMichael Welling 64a748941cSMichael Welling static struct i2c_driver tsc2004_driver = { 65a748941cSMichael Welling .driver = { 66a748941cSMichael Welling .name = "tsc2004", 67a748941cSMichael Welling .of_match_table = of_match_ptr(tsc2004_of_match), 68*6470215bSJonathan Cameron .pm = pm_sleep_ptr(&tsc200x_pm_ops), 69a748941cSMichael Welling }, 70a748941cSMichael Welling .id_table = tsc2004_idtable, 71cd66fd10SUwe Kleine-König .probe_new = tsc2004_probe, 72a748941cSMichael Welling .remove = tsc2004_remove, 73a748941cSMichael Welling }; 74a748941cSMichael Welling module_i2c_driver(tsc2004_driver); 75a748941cSMichael Welling 76a748941cSMichael Welling MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>"); 77a748941cSMichael Welling MODULE_DESCRIPTION("TSC2004 Touchscreen Driver"); 78a748941cSMichael Welling MODULE_LICENSE("GPL"); 79