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input: Allow updating of keyboard LEDs

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Add a function which returns a new keyboard LED value when the LEDs need
updating.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-11-11 10:05:40 -07:00
parent ba42034267
commit 3b5f6f5001
2 changed files with 22 additions and 1 deletions
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9
drivers/input/input.c
View File

@ -275,6 +275,7 @@ static struct input_key_xlate *process_modifier(struct input_config *config,
if (config->flags & FLAG_SCROLL_LOCK)
leds |= INPUT_LED_SCROLL;
config->leds = leds;
config->leds_changed = flip;
}
}
@ -586,6 +587,14 @@ void input_allow_repeats(struct input_config *config, bool allow_repeats)
config->allow_repeats = allow_repeats;
}
int input_leds_changed(struct input_config *config)
{
if (config->leds_changed)
return config->leds;
return -1;
}
int input_add_tables(struct input_config *config, bool german)
{
struct kbd_entry *entry;

14
include/input.h
View File

@ -43,7 +43,8 @@ struct input_config {
/* Which modifiers are active (1 bit for each MOD_... value) */
uchar modifiers;
uchar flags; /* active state keys (FLAGS_...) */
uchar leds; /* active LEDS (INPUT_LED_...) */
uchar leds; /* active LEDs (INPUT_LED_...) */
uchar leds_changed; /* LEDs that just changed */
uchar num_tables; /* number of modifier tables */
int prev_keycodes[INPUT_BUFFER_LEN]; /* keys held last time */
int num_prev_keycodes; /* number of prev keys */
@ -161,6 +162,17 @@ void input_set_delays(struct input_config *config, int repeat_delay_ms,
*/
void input_allow_repeats(struct input_config *config, bool allow_repeats);
/**
* Check if keyboard LEDs need to be updated
*
* This can be called after input_tstc() to see if keyboard LEDs need
* updating.
*
* @param config Input state
* @return -1 if no LEDs need updating, other value if they do
*/
int input_leds_changed(struct input_config *config);
/**
* Set up the key map tables
*