[v2,2/8] drivers:input:tsc2007: send pendown and penup only once like ads7846(+tsc2046) driver does

Commit Message

H. Nikolaus Schaller Nov. 13, 2015, 8:35 p.m. UTC

this should reduce unnecessary input events.

Signed-off-by: H. Nikolaus Schaller <[e-mail]>
---
 drivers/input/touchscreen/tsc2007.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index e0c7173..1a8a79d 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -94,6 +94,7 @@  struct tsc2007 {
 
 	wait_queue_head_t	wait;
 	bool			stopped;
+	bool			pendown;
 
 	int			(*get_pendown_state)(struct device *);
 	void			(*clear_penirq)(void);
@@ -251,7 +252,10 @@  static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
 			dev_dbg(&ts->client->dev,
 					"shaped point(%4d,%4d), pressure (%4u)\n",
 					tc.x, tc.y, rt);
-			input_report_key(input, BTN_TOUCH, 1);
+			if (!ts->pendown) {
+				input_report_key(input, BTN_TOUCH, 1);
+				ts->pendown = true;
+			}
 			input_report_abs(input, ABS_X, tc.x);
 			input_report_abs(input, ABS_Y, tc.y);
 			input_report_abs(input, ABS_PRESSURE, rt);
@@ -272,9 +276,13 @@  static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
 
 	dev_dbg(&ts->client->dev, "UP\n");
 
-	input_report_key(input, BTN_TOUCH, 0);
-	input_report_abs(input, ABS_PRESSURE, 0);
-	input_sync(input);
+	if (ts->pendown) {
+		input_report_key(input, BTN_TOUCH, 0);
+		input_report_abs(input, ABS_PRESSURE, 0);
+		input_sync(input);
+
+		ts->pendown = false;
+	}
 
 	if (ts->clear_penirq)
 		ts->clear_penirq();