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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Goodix Berlin Touchscreen Driver
*
* Copyright (C) 2020 - 2021 Goodix, Inc.
* Copyright (C) 2023 Linaro Ltd.
*
* Based on goodix_ts_berlin driver.
*/
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/input.h>
#include "goodix_berlin.h"
#define I2C_MAX_TRANSFER_SIZE 256
static const struct regmap_config goodix_berlin_i2c_regmap_conf = {
.reg_bits = 32,
.val_bits = 8,
.max_raw_read = I2C_MAX_TRANSFER_SIZE,
.max_raw_write = I2C_MAX_TRANSFER_SIZE,
};
/* vendor & product left unassigned here, should probably be updated from fw info */
static const struct input_id goodix_berlin_i2c_input_id = {
.bustype = BUS_I2C,
};
static int goodix_berlin_i2c_probe(struct i2c_client *client)
{
struct regmap *regmap;
int error;
regmap = devm_regmap_init_i2c(client, &goodix_berlin_i2c_regmap_conf);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
error = goodix_berlin_probe(&client->dev, client->irq,
&goodix_berlin_i2c_input_id, regmap);
if (error)
return error;
return 0;
}
static const struct i2c_device_id goodix_berlin_i2c_id[] = {
{ "gt9916" },
{ }
};
MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id);
static const struct of_device_id goodix_berlin_i2c_of_match[] = {
{ .compatible = "goodix,gt9916", },
{ }
};
MODULE_DEVICE_TABLE(of, goodix_berlin_i2c_of_match);
static struct i2c_driver goodix_berlin_i2c_driver = {
.driver = {
.name = "goodix-berlin-i2c",
.of_match_table = goodix_berlin_i2c_of_match,
.pm = pm_sleep_ptr(&goodix_berlin_pm_ops),
},
.probe = goodix_berlin_i2c_probe,
.id_table = goodix_berlin_i2c_id,
};
module_i2c_driver(goodix_berlin_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Goodix Berlin I2C Touchscreen driver");
MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");
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