| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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| 2 | /* |
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| 3 | * TSC2004 touchscreen driver |
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| 4 | * |
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| 5 | * Copyright (C) 2015 QWERTY Embedded Design |
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| 6 | * Copyright (C) 2015 EMAC Inc. |
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| 7 | */ |
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| 8 | |
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| 9 | #include <linux/module.h> |
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| 10 | #include <linux/input.h> |
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| 11 | #include <linux/of.h> |
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| 12 | #include <linux/i2c.h> |
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| 13 | #include <linux/regmap.h> |
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| 14 | #include "tsc200x-core.h" |
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| 15 | |
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| 16 | static const struct input_id tsc2004_input_id = { |
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| 17 | .bustype = BUS_I2C, |
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| 18 | .product = 2004, |
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| 19 | }; |
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| 20 | |
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| 21 | static int tsc2004_cmd(struct device *dev, u8 cmd) |
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| 22 | { |
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| 23 | u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd; |
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| 24 | s32 data; |
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| 25 | struct i2c_client *i2c = to_i2c_client(dev); |
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| 26 | |
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| 27 | data = i2c_smbus_write_byte(client: i2c, value: tx); |
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| 28 | if (data < 0) { |
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| 29 | dev_err(dev, "%s: failed, command: %x i2c error: %d\n" , |
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| 30 | __func__, cmd, data); |
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| 31 | return data; |
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| 32 | } |
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| 33 | |
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| 34 | return 0; |
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| 35 | } |
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| 36 | |
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| 37 | static int tsc2004_probe(struct i2c_client *i2c) |
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| 38 | |
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| 39 | { |
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| 40 | return tsc200x_probe(dev: &i2c->dev, irq: i2c->irq, tsc_id: &tsc2004_input_id, |
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| 41 | devm_regmap_init_i2c(i2c, &tsc200x_regmap_config), |
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| 42 | tsc200x_cmd: tsc2004_cmd); |
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| 43 | } |
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| 44 | |
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| 45 | static void tsc2004_remove(struct i2c_client *i2c) |
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| 46 | { |
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| 47 | tsc200x_remove(dev: &i2c->dev); |
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| 48 | } |
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| 49 | |
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| 50 | static const struct i2c_device_id tsc2004_idtable[] = { |
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| 51 | { "tsc2004" , 0 }, |
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| 52 | { } |
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| 53 | }; |
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| 54 | MODULE_DEVICE_TABLE(i2c, tsc2004_idtable); |
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| 55 | |
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| 56 | #ifdef CONFIG_OF |
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| 57 | static const struct of_device_id tsc2004_of_match[] = { |
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| 58 | { .compatible = "ti,tsc2004" }, |
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| 59 | { /* sentinel */ } |
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| 60 | }; |
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| 61 | MODULE_DEVICE_TABLE(of, tsc2004_of_match); |
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| 62 | #endif |
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| 63 | |
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| 64 | static struct i2c_driver tsc2004_driver = { |
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| 65 | .driver = { |
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| 66 | .name = "tsc2004" , |
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| 67 | .of_match_table = of_match_ptr(tsc2004_of_match), |
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| 68 | .pm = pm_sleep_ptr(&tsc200x_pm_ops), |
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| 69 | }, |
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| 70 | .id_table = tsc2004_idtable, |
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| 71 | .probe = tsc2004_probe, |
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| 72 | .remove = tsc2004_remove, |
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| 73 | }; |
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| 74 | module_i2c_driver(tsc2004_driver); |
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| 75 | |
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| 76 | MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>" ); |
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| 77 | MODULE_DESCRIPTION("TSC2004 Touchscreen Driver" ); |
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| 78 | MODULE_LICENSE("GPL" ); |
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| 79 | |
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