[PATCH v5 2/8] drivers:input:tsc2007: send pendown and penup only once like ads7846(+tsc2046) driver does

[H. Nikolaus Schaller]

this should reduce unnecessary input events.

Signed-off-by: H. Nikolaus Schaller <h...@goldelico.com>
---
 drivers/input/touchscreen/tsc2007.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/tsc2007.c 
b/drivers/input/touchscreen/tsc2007.c
index c1d9593..e9d5086 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);
@@ -227,7 +228,11 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
                                sx, sy, rt);
 
                        /* report event */
-                       input_report_key(input, BTN_TOUCH, 1);
+                       if (!ts->pendown) {
+                               input_report_key(input, BTN_TOUCH, 1);
+                               ts->pendown = true;
+                       }
+
                        touchscreen_report_pos(ts->input, &ts->prop,
                                                (unsigned int) sx,
                                                (unsigned int) sy,
@@ -250,9 +255,13 @@ 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();
-- 
2.7.3