[U-Boot] [PATCH v3 4/4] samsung: misc: keys: fix gpio key bouncing by adding 50 ms delay

Przemyslaw Marczak
2014-04-03T08:27:59Z

This change prevents gpio keys bouncing by adding 50 ms delay
when key pressed condition met.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>

---
Changes v2:
- new commit

Changes v3:
- correct commit message
---
board/samsung/common/misc.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/board/samsung/common/misc.c b/board/samsung/common/misc.c
index 65b5c30..5b43821 100644
--- a/board/samsung/common/misc.c
+++ b/board/samsung/common/misc.c
@@ -105,6 +105,10 @@ static int check_keys(void)
if (key_pressed(KEY_VOLUMEDOWN))
keys += KEY_VOLUMEDOWN;

+ /* Avoids gpio keys debouncing */
+ if (keys)
+ mdelay(50);
+
return keys;
}

--
1.9.0