// SPDX-License-Identifier: GPL-2.0-only /* * Touchkey driver for Freescale MPR121 Controllor * * Copyright (C) 2011 Freescale Semiconductor, Inc. * Author: Zhang Jiejing <[email protected]> * * Based on mcs_touchkey.c */ #include <linux/bitops.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> #include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> /* Register definitions */ #define ELE_TOUCH_STATUS_0_ADDR … #define ELE_TOUCH_STATUS_1_ADDR … #define MHD_RISING_ADDR … #define NHD_RISING_ADDR … #define NCL_RISING_ADDR … #define FDL_RISING_ADDR … #define MHD_FALLING_ADDR … #define NHD_FALLING_ADDR … #define NCL_FALLING_ADDR … #define FDL_FALLING_ADDR … #define ELE0_TOUCH_THRESHOLD_ADDR … #define ELE0_RELEASE_THRESHOLD_ADDR … #define AFE_CONF_ADDR … #define FILTER_CONF_ADDR … /* * ELECTRODE_CONF_ADDR: This register configures the number of * enabled capacitance sensing inputs and its run/suspend mode. */ #define ELECTRODE_CONF_ADDR … #define ELECTRODE_CONF_QUICK_CHARGE … #define AUTO_CONFIG_CTRL_ADDR … #define AUTO_CONFIG_USL_ADDR … #define AUTO_CONFIG_LSL_ADDR … #define AUTO_CONFIG_TL_ADDR … /* Threshold of touch/release trigger */ #define TOUCH_THRESHOLD … #define RELEASE_THRESHOLD … /* Masks for touch and release triggers */ #define TOUCH_STATUS_MASK … /* MPR121 has 12 keys */ #define MPR121_MAX_KEY_COUNT … #define MPR121_MIN_POLL_INTERVAL … #define MPR121_MAX_POLL_INTERVAL … struct mpr121_touchkey { … }; struct mpr121_init_register { … }; static const struct mpr121_init_register init_reg_table[] = …; static void mpr121_vdd_supply_disable(void *data) { … } static struct regulator *mpr121_vdd_supply_init(struct device *dev) { … } static void mpr_touchkey_report(struct input_dev *dev) { … } static irqreturn_t mpr_touchkey_interrupt(int irq, void *dev_id) { … } static int mpr121_phys_init(struct mpr121_touchkey *mpr121, struct i2c_client *client, int vdd_uv) { … } static int mpr_touchkey_probe(struct i2c_client *client) { … } static int mpr_suspend(struct device *dev) { … } static int mpr_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(mpr121_touchkey_pm_ops, mpr_suspend, mpr_resume); static const struct i2c_device_id mpr121_id[] = …; MODULE_DEVICE_TABLE(i2c, mpr121_id); #ifdef CONFIG_OF static const struct of_device_id mpr121_touchkey_dt_match_table[] = …; MODULE_DEVICE_TABLE(of, mpr121_touchkey_dt_match_table); #endif static struct i2c_driver mpr_touchkey_driver = …; module_i2c_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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