// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for ELAN eKTF2127 i2c touchscreen controller * * For this driver the layout of the Chipone icn8318 i2c * touchscreencontroller is used. * * Author: * Michel Verlaan <[email protected]> * Siebren Vroegindeweij <[email protected]> * * Original chipone_icn8318 driver: * Hans de Goede <[email protected]> */ #include <linux/bits.h> #include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/module.h> #include <linux/of.h> #include <linux/delay.h> /* Packet header defines (first byte of data send / received) */ #define EKTF2127_NOISE … #define EKTF2127_RESPONSE … #define EKTF2127_REQUEST … #define EKTF2127_HELLO … #define EKTF2127_REPORT2 … #define EKTF2127_REPORT … #define EKTF2127_CALIB_DONE … /* Register defines (second byte of data send / received) */ #define EKTF2127_ENV_NOISY … #define EKTF2127_HEIGHT … #define EKTF2127_WIDTH … /* 2 bytes header + 5 * 3 bytes coordinates + 3 bytes pressure info + footer */ #define EKTF2127_TOUCH_REPORT_SIZE … #define EKTF2127_MAX_TOUCHES … struct ektf2127_ts { … }; struct ektf2127_i2c_chip_data { … }; static void ektf2127_parse_coordinates(const u8 *buf, unsigned int touch_count, struct input_mt_pos *touches) { … } static void ektf2127_report_event(struct ektf2127_ts *ts, const u8 *buf) { … } static void ektf2127_report2_contact(struct ektf2127_ts *ts, int slot, const u8 *buf, bool active) { … } static void ektf2127_report2_event(struct ektf2127_ts *ts, const u8 *buf) { … } static irqreturn_t ektf2127_irq(int irq, void *dev_id) { … } static int ektf2127_start(struct input_dev *dev) { … } static void ektf2127_stop(struct input_dev *dev) { … } static int ektf2127_suspend(struct device *dev) { … } static int ektf2127_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(ektf2127_pm_ops, ektf2127_suspend, ektf2127_resume); static int ektf2127_query_dimension(struct i2c_client *client, bool width) { … } static int ektf2127_probe(struct i2c_client *client) { … } static const struct ektf2127_i2c_chip_data ektf2127_data = …; static const struct ektf2127_i2c_chip_data ektf2232_data = …; #ifdef CONFIG_OF static const struct of_device_id ektf2127_of_match[] = …; MODULE_DEVICE_TABLE(of, ektf2127_of_match); #endif static const struct i2c_device_id ektf2127_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, ektf2127_i2c_id); static struct i2c_driver ektf2127_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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