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dm: key: add universal interface to parse gpio and adc key event 

Change-Id: I9a1b9d0a36d8fe34ea68bb4f15bf217cae407bf0
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
This commit is contained in:
Joseph Chen 2018-02-28 14:21:44 +08:00 committed by Kever Yang
parent 459102b8a5
commit 3fb8400061
2 changed files with 70 additions and 0 deletions
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66
drivers/input/key-uclass.c
View File

@ -45,6 +45,72 @@ static int key_read(struct udevice *dev, int code)
return ops->read(dev, code);
}
int key_parse_adc_event(struct input_key *key, unsigned int adcval)
{
int report = KEY_NOT_EXIST;
int max, min;
debug("%s: %s: max=%d, min=%d, adcval=%d\n",
__func__, key->name, max, min, adcval);
/* Get min, max */
max = key->value + key->margin;
if (key->value > key->margin)
min = key->value - key->margin;
else
min = key->value;
/* Check */
if ((adcval <= max) && (adcval >= min)) {
report = KEY_PRESS_DOWN;
printf("%s key pressed..\n", key->name);
} else {
report = KEY_PRESS_NONE;
}
return report;
}
int key_parse_gpio_event(struct input_key *key)
{
u32 report = KEY_NOT_EXIST;
debug("%s: %s: up=%llu, down=%llu, delta=%llu\n",
__func__, key->name, key->up_t, key->down_t,
key->up_t - key->down_t);
/* Possible this is machine power-on long pressed, so ignore this */
if (key->down_t == 0 && key->up_t != 0) {
report = KEY_PRESS_NONE;
goto out;
}
if ((key->up_t > key->down_t) &&
(key->up_t - key->down_t) >= KEY_LONG_DOWN_MS) {
key->up_t = 0;
key->down_t = 0;
report = KEY_PRESS_LONG_DOWN;
printf("%s key long pressed(hold)..\n", key->name);
} else if (key->down_t &&
key_get_timer(key->down_t) >= KEY_LONG_DOWN_MS) {
key->up_t = 0;
key->down_t = 0;
report = KEY_PRESS_LONG_DOWN;
printf("%s key long pressed..\n", key->name);
} else if ((key->up_t > key->down_t) &&
(key->up_t - key->down_t) < KEY_LONG_DOWN_MS) {
key->up_t = 0;
key->down_t = 0;
report = KEY_PRESS_DOWN;
printf("%s key short pressed..\n", key->name);
} else {
report = KEY_PRESS_NONE;
}
out:
return report;
}
int platform_key_read(int code)
{
struct udevice *dev;

4
include/key.h
View File

@ -41,4 +41,8 @@ struct input_key {
uint64_t key_get_timer(uint64_t base);
int platform_key_read(int code);
/* General interface for adc or gpio interrupt key event parse */
int key_parse_gpio_event(struct input_key *key);
int key_parse_adc_event(struct input_key *key, unsigned int adcval);
#endif