// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for MAXI MAX11801 - A Resistive touch screen controller with * i2c interface * * Copyright (C) 2011 Freescale Semiconductor, Inc. * Author: Zhang Jiejing <[email protected]> * * Based on mcs5000_ts.c */ /* * This driver aims to support the series of MAXI touch chips max11801 * through max11803. The main difference between these 4 chips can be * found in the table below: * ----------------------------------------------------- * | CHIP | AUTO MODE SUPPORT(FIFO) | INTERFACE | * |----------------------------------------------------| * | max11800 | YES | SPI | * | max11801 | YES | I2C | * | max11802 | NO | SPI | * | max11803 | NO | I2C | * ------------------------------------------------------ * * Currently, this driver only supports max11801. * * Data Sheet: * http://www.maxim-ic.com/datasheet/index.mvp/id/5943 */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/slab.h> #include <linux/bitops.h> /* Register Address define */ #define GENERNAL_STATUS_REG … #define GENERNAL_CONF_REG … #define MESURE_RES_CONF_REG … #define MESURE_AVER_CONF_REG … #define ADC_SAMPLE_TIME_CONF_REG … #define PANEL_SETUPTIME_CONF_REG … #define DELAY_CONVERSION_CONF_REG … #define TOUCH_DETECT_PULLUP_CONF_REG … #define AUTO_MODE_TIME_CONF_REG … #define APERTURE_CONF_REG … #define AUX_MESURE_CONF_REG … #define OP_MODE_CONF_REG … /* FIFO is found only in max11800 and max11801 */ #define FIFO_RD_CMD … #define MAX11801_FIFO_INT … #define MAX11801_FIFO_OVERFLOW … #define XY_BUFSIZE … #define XY_BUF_OFFSET … #define MAX11801_MAX_X … #define MAX11801_MAX_Y … #define MEASURE_TAG_OFFSET … #define MEASURE_TAG_MASK … #define EVENT_TAG_OFFSET … #define EVENT_TAG_MASK … #define MEASURE_X_TAG … #define MEASURE_Y_TAG … /* These are the state of touch event state machine */ enum { … }; struct max11801_data { … }; static u8 read_register(struct i2c_client *client, int addr) { … } static int max11801_write_reg(struct i2c_client *client, int addr, int data) { … } static irqreturn_t max11801_ts_interrupt(int irq, void *dev_id) { … } static void max11801_ts_phy_init(struct max11801_data *data) { … } static int max11801_ts_probe(struct i2c_client *client) { … } static const struct i2c_device_id max11801_ts_id[] = …; MODULE_DEVICE_TABLE(i2c, max11801_ts_id); static const struct of_device_id max11801_ts_dt_ids[] = …; MODULE_DEVICE_TABLE(of, max11801_ts_dt_ids); static struct i2c_driver max11801_ts_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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