// SPDX-License-Identifier: GPL-2.0-only /* * max7359_keypad.c - MAX7359 Key Switch Controller Driver * * Copyright (C) 2009 Samsung Electronics * Kim Kyuwon <[email protected]> * * Based on pxa27x_keypad.c * * Datasheet: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5456 */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/pm.h> #include <linux/input.h> #include <linux/input/matrix_keypad.h> #define MAX7359_MAX_KEY_ROWS … #define MAX7359_MAX_KEY_COLS … #define MAX7359_MAX_KEY_NUM … #define MAX7359_ROW_SHIFT … /* * MAX7359 registers */ #define MAX7359_REG_KEYFIFO … #define MAX7359_REG_CONFIG … #define MAX7359_REG_DEBOUNCE … #define MAX7359_REG_INTERRUPT … #define MAX7359_REG_PORTS … #define MAX7359_REG_KEYREP … #define MAX7359_REG_SLEEP … /* * Configuration register bits */ #define MAX7359_CFG_SLEEP … #define MAX7359_CFG_INTERRUPT … #define MAX7359_CFG_KEY_RELEASE … #define MAX7359_CFG_WAKEUP … #define MAX7359_CFG_TIMEOUT … /* * Autosleep register values (ms) */ #define MAX7359_AUTOSLEEP_8192 … #define MAX7359_AUTOSLEEP_4096 … #define MAX7359_AUTOSLEEP_2048 … #define MAX7359_AUTOSLEEP_1024 … #define MAX7359_AUTOSLEEP_512 … #define MAX7359_AUTOSLEEP_256 … struct max7359_keypad { … }; static int max7359_write_reg(struct i2c_client *client, u8 reg, u8 val) { … } static int max7359_read_reg(struct i2c_client *client, int reg) { … } /* runs in an IRQ thread -- can (and will!) sleep */ static irqreturn_t max7359_interrupt(int irq, void *dev_id) { … } /* * Let MAX7359 fall into a deep sleep: * If no keys are pressed, enter sleep mode for 8192 ms. And if any * key is pressed, the MAX7359 returns to normal operating mode. */ static inline void max7359_fall_deepsleep(struct i2c_client *client) { … } /* * Let MAX7359 take a catnap: * Autosleep just for 256 ms. */ static inline void max7359_take_catnap(struct i2c_client *client) { … } static int max7359_open(struct input_dev *dev) { … } static void max7359_close(struct input_dev *dev) { … } static void max7359_initialize(struct i2c_client *client) { … } static int max7359_probe(struct i2c_client *client) { … } static int max7359_suspend(struct device *dev) { … } static int max7359_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(max7359_pm, max7359_suspend, max7359_resume); static const struct i2c_device_id max7359_ids[] = …; MODULE_DEVICE_TABLE(i2c, max7359_ids); static struct i2c_driver max7359_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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