input: Allow updating of keyboard LEDs

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>

input: Allow updating of keyboard LEDs
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>
Simon Glass
1 parent ba42034267
Showing 2 changed files with 22 additions and 1 deletions Side-by-side Diff
drivers/input/input.c
include/input.h
@@ -275,6 +275,7 @@
 			if (config->flags & FLAG_SCROLL_LOCK)
 				leds |= INPUT_LED_SCROLL;
 			config->leds = leds;
+			config->leds_changed = flip;
 		}
 	}
  
@@ -584,6 +585,14 @@
 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)
@@ -43,7 +43,8 @@
 	/* 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 */
@@ -160,6 +161,17 @@
  *			keyboard repeat processing with a timer.
  */
 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
...	...	@@ -275,6 +275,7 @@
275	275	if (config->flags & FLAG_SCROLL_LOCK)
276	276	leds \|= INPUT_LED_SCROLL;
277	277	config->leds = leds;
	278	+ config->leds_changed = flip;
278	279	}
279	280	}
280	281
...	...	@@ -584,6 +585,14 @@
584	585	void input_allow_repeats(struct input_config *config, bool allow_repeats)
585	586	{
586	587	config->allow_repeats = allow_repeats;
	588	+}
	589	+
	590	+int input_leds_changed(struct input_config *config)
	591	+{
	592	+ if (config->leds_changed)
	593	+ return config->leds;
	594	+
	595	+ return -1;
587	596	}
588	597
589	598	int input_add_tables(struct input_config *config, bool german)
...	...	@@ -43,7 +43,8 @@
43	43	/* Which modifiers are active (1 bit for each MOD_... value) */
44	44	uchar modifiers;
45	45	uchar flags; /* active state keys (FLAGS_...) */
46		- uchar leds; /* active LEDS (INPUT_LED_...) */
	46	+ uchar leds; /* active LEDs (INPUT_LED_...) */
	47	+ uchar leds_changed; /* LEDs that just changed */
47	48	uchar num_tables; /* number of modifier tables */
48	49	int prev_keycodes[INPUT_BUFFER_LEN]; /* keys held last time */
49	50	int num_prev_keycodes; /* number of prev keys */
...	...	@@ -160,6 +161,17 @@
160	161	* keyboard repeat processing with a timer.
161	162	*/
162	163	void input_allow_repeats(struct input_config *config, bool allow_repeats);
	164	+
	165	+/**
	166	+ * Check if keyboard LEDs need to be updated
	167	+ *
	168	+ * This can be called after input_tstc() to see if keyboard LEDs need
	169	+ * updating.
	170	+ *
	171	+ * @param config Input state
	172	+ * @return -1 if no LEDs need updating, other value if they do
	173	+ */
	174	+int input_leds_changed(struct input_config *config);
163	175
164	176	/**
165	177	* Set up the key map tables