| 1 | |
| 2 | |
| 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(i2c, 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(&i2c->dev, i2c->irq, &tsc2004_input_id,
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| 41 | devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
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| 42 | tsc2004_cmd);
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| 43 | }
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| 44 |
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| 45 | static const struct i2c_device_id tsc2004_idtable[] = {
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| 46 | { .name = "tsc2004" },
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| 47 | { }
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| 48 | };
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| 49 | MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
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| 50 |
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| 51 | #ifdef CONFIG_OF
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| 52 | static const struct of_device_id tsc2004_of_match[] = {
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| 53 | { .compatible = "ti,tsc2004" },
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| 54 | { }
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| 55 | };
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| 56 | MODULE_DEVICE_TABLE(of, tsc2004_of_match);
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| 57 | #endif
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| 58 |
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| 59 | static struct i2c_driver tsc2004_driver = {
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| 60 | .driver = {
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| 61 | .name = "tsc2004",
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| 62 | .dev_groups = tsc200x_groups,
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| 63 | .of_match_table = of_match_ptr(tsc2004_of_match),
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| 64 | .pm = pm_sleep_ptr(&tsc200x_pm_ops),
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| 65 | },
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| 66 | .id_table = tsc2004_idtable,
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| 67 | .probe = tsc2004_probe,
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| 68 | };
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| 69 | module_i2c_driver(tsc2004_driver);
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| 70 |
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| 71 | MODULE_AUTHOR("Michael Welling <[email protected]>");
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| 72 | MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
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| 73 | MODULE_LICENSE("GPL");
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