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_event { 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 dm_key_uclass_platdata { 29 const char *name; 30 bool pre_reloc; 31 u32 code; 32 u8 type; 33 34 /* ADC key */ 35 u8 channel; 36 u32 adcval; 37 u32 min; 38 u32 max; 39 40 /* GPIO key */ 41 u32 irq; 42 u32 gpios[2]; /* gpios[0]: gpio controller phandle, gpios[1]: pin */ 43 struct gpio_desc gpio; 44 45 u64 rise_ms; 46 u64 fall_ms; 47 48 u32 trig_cnt; 49 50 int skip_irq_init; 51 52 /* Only for pwrkey gpio irq */ 53 void (*irq_thread)(int irq, struct udevice *dev); 54 }; 55 56 /* Use it instead of get_timer() in key interrupt handler */ 57 uint64_t key_timer(uint64_t base); 58 59 /* Confirm if your key value is a press event */ 60 int key_is_pressed(int keyval); 61 62 /* Pwrkey download mode init */ 63 int pwrkey_download_init(void); 64 65 /* Read key */ 66 int key_read(int code); 67 68 int key_bind_children(struct udevice *dev, const char *drv_name); 69 70 #endif 71