Quelle  goodix_berlin_i2c.c   Sprache: C

// 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)
{
 const struct goodix_berlin_ic_data *ic_data =
  i2c_get_match_data(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,
        ic_data);
 if (error)
  return error;

 return 0;
}

static const struct goodix_berlin_ic_data gt9916_data = {
 .fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR_D,
 .ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR_D,
};

static const struct i2c_device_id goodix_berlin_i2c_id[] = {
 { .name = "gt9916", .driver_data = (long)>9916_data },
 { }
};

MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id);

static const struct of_device_id goodix_berlin_i2c_of_match[] = {
 { .compatible = "goodix,gt9916", .data = >9916_data },
 { }
};
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),
  .dev_groups = goodix_berlin_groups,
 },
 .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 ");