// 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>");