1b398a9a7SJoseph Chen /* 2b398a9a7SJoseph Chen * (C) Copyright 2017 Rockchip Electronics Co., Ltd 3b398a9a7SJoseph Chen * 4b398a9a7SJoseph Chen * SPDX-License-Identifier: GPL-2.0+ 5b398a9a7SJoseph Chen */ 6b398a9a7SJoseph Chen 7b398a9a7SJoseph Chen #ifndef _KEY_H_ 8b398a9a7SJoseph Chen #define _KEY_H_ 9b398a9a7SJoseph Chen 1064048c53SJoseph Chen #include <asm-generic/gpio.h> 110abc3779SJoseph Chen #include <dt-bindings/input/linux-event-codes.h> 126d82ce07SJoseph Chen 13c315aab8SJoseph Chen #define KEY_LONG_DOWN_MS 2000 14c315aab8SJoseph Chen 1564048c53SJoseph Chen enum { 1664048c53SJoseph Chen INVAL_KEY = 0x0, 1764048c53SJoseph Chen ADC_KEY = 0x1, 1864048c53SJoseph Chen GPIO_KEY = 0x2, 1964048c53SJoseph Chen }; 2064048c53SJoseph Chen 21b398a9a7SJoseph Chen enum key_state { 22deedd356SJoseph Chen KEY_PRESS_NONE, /* press without release */ 23deedd356SJoseph Chen KEY_PRESS_DOWN, /* press -> release */ 24c315aab8SJoseph Chen KEY_PRESS_LONG_DOWN, 25a2df9606SJoseph Chen KEY_NOT_EXIST, 26b398a9a7SJoseph Chen }; 27b398a9a7SJoseph Chen 28a2df9606SJoseph Chen struct input_key { 2964048c53SJoseph Chen struct udevice *parent; 3064048c53SJoseph Chen struct list_head link; 31a2df9606SJoseph Chen const char *name; 32*9f1dd9dfSJoseph Chen bool pre_reloc; 33a2df9606SJoseph Chen u32 code; 3464048c53SJoseph Chen u8 type; 35a2df9606SJoseph Chen 3664048c53SJoseph Chen /* ADC key */ 3764048c53SJoseph Chen u32 adcval; 3864048c53SJoseph Chen u32 vref; 3964048c53SJoseph Chen u8 channel; 4064048c53SJoseph Chen 4164048c53SJoseph Chen /* GPIO key */ 42a2df9606SJoseph Chen u32 irq; 4364048c53SJoseph Chen struct gpio_desc gpio; 4464048c53SJoseph Chen 4564048c53SJoseph Chen /* Event */ 46a2df9606SJoseph Chen u64 up_t; 47a2df9606SJoseph Chen u64 down_t; 48a2df9606SJoseph Chen }; 49a2df9606SJoseph Chen 5064048c53SJoseph Chen struct dm_key_ops { 5164048c53SJoseph Chen const char *name; 5264048c53SJoseph Chen }; 53b398a9a7SJoseph Chen 5464048c53SJoseph Chen /* Use it instead of get_timer() in key interrupt handler */ 5564048c53SJoseph Chen uint64_t key_timer(uint64_t base); 5664048c53SJoseph Chen 5764048c53SJoseph Chen /* Reister you key to dm key framework */ 5864048c53SJoseph Chen void key_add(struct input_key *key); 5964048c53SJoseph Chen 6064048c53SJoseph Chen /* Confirm if your key value is a press event */ 6164048c53SJoseph Chen int key_is_pressed(int keyval); 6264048c53SJoseph Chen 6364048c53SJoseph Chen /* Read key */ 6464048c53SJoseph Chen int key_read(int code); 6564048c53SJoseph Chen 66b398a9a7SJoseph Chen #endif 67