1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Goodix Berlin Touchscreen Driver
4 *
5 * Copyright (C) 2020 - 2021 Goodix, Inc.
6 * Copyright (C) 2023 Linaro Ltd.
7 *
8 * Based on goodix_ts_berlin driver.
9 */
10#include <linux/i2c.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/regmap.h>
14#include <linux/input.h>
15
16#include "goodix_berlin.h"
17
18#define I2C_MAX_TRANSFER_SIZE		256
19
20static const struct regmap_config goodix_berlin_i2c_regmap_conf = {
21	.reg_bits = 32,
22	.val_bits = 8,
23	.max_raw_read = I2C_MAX_TRANSFER_SIZE,
24	.max_raw_write = I2C_MAX_TRANSFER_SIZE,
25};
26
27/* vendor & product left unassigned here, should probably be updated from fw info */
28static const struct input_id goodix_berlin_i2c_input_id = {
29	.bustype = BUS_I2C,
30};
31
32static int goodix_berlin_i2c_probe(struct i2c_client *client)
33{
34	struct regmap *regmap;
35	int error;
36
37	regmap = devm_regmap_init_i2c(client, &goodix_berlin_i2c_regmap_conf);
38	if (IS_ERR(regmap))
39		return PTR_ERR(regmap);
40
41	error = goodix_berlin_probe(&client->dev, client->irq,
42				    &goodix_berlin_i2c_input_id, regmap);
43	if (error)
44		return error;
45
46	return 0;
47}
48
49static const struct i2c_device_id goodix_berlin_i2c_id[] = {
50	{ "gt9916", 0 },
51	{ }
52};
53
54MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id);
55
56static const struct of_device_id goodix_berlin_i2c_of_match[] = {
57	{ .compatible = "goodix,gt9916", },
58	{ }
59};
60MODULE_DEVICE_TABLE(of, goodix_berlin_i2c_of_match);
61
62static struct i2c_driver goodix_berlin_i2c_driver = {
63	.driver = {
64		.name = "goodix-berlin-i2c",
65		.of_match_table = goodix_berlin_i2c_of_match,
66		.pm = pm_sleep_ptr(&goodix_berlin_pm_ops),
67	},
68	.probe = goodix_berlin_i2c_probe,
69	.id_table = goodix_berlin_i2c_id,
70};
71module_i2c_driver(goodix_berlin_i2c_driver);
72
73MODULE_LICENSE("GPL");
74MODULE_DESCRIPTION("Goodix Berlin I2C Touchscreen driver");
75MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");
76