1 /* 2 * (C) Copyright 2017 Rockchip Electronics Co., Ltd 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #ifndef _KEY_H_ 8 #define _KEY_H_ 9 10 #include <asm-generic/gpio.h> 11 #include <dt-bindings/input/linux-event-codes.h> 12 13 #define KEY_LONG_DOWN_MS 2000 14 15 enum { 16 INVAL_KEY = 0x0, 17 ADC_KEY = 0x1, 18 GPIO_KEY = 0x2, 19 }; 20 21 enum key_state { 22 KEY_PRESS_NONE, /* press without release */ 23 KEY_PRESS_DOWN, /* press -> release */ 24 KEY_PRESS_LONG_DOWN, 25 KEY_NOT_EXIST, 26 }; 27 28 struct input_key { 29 struct udevice *parent; 30 struct list_head link; 31 const char *name; 32 bool pre_reloc; 33 u32 code; 34 u8 type; 35 36 /* ADC key */ 37 u32 adcval; 38 u32 vref; 39 u8 channel; 40 41 /* GPIO key */ 42 u32 irq; 43 struct gpio_desc gpio; 44 45 /* Event */ 46 u64 up_t; 47 u64 down_t; 48 }; 49 50 struct dm_key_ops { 51 const char *name; 52 }; 53 54 /* Use it instead of get_timer() in key interrupt handler */ 55 uint64_t key_timer(uint64_t base); 56 57 /* Reister you key to dm key framework */ 58 void key_add(struct input_key *key); 59 60 /* Confirm if your key value is a press event */ 61 int key_is_pressed(int keyval); 62 63 /* Read key */ 64 int key_read(int code); 65 66 #endif 67