diff options
| -rw-r--r-- | drivers/input/touchscreen/wm9712.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/wm9712.c b/drivers/input/touchscreen/wm9712.c index a983da1744e8..3b4eed4b8690 100644 --- a/drivers/input/touchscreen/wm9712.c +++ b/drivers/input/touchscreen/wm9712.c @@ -302,8 +302,12 @@ static int wm9712_poll_sample(struct wm97xx *wm, int adcsel, int *sample) } if (wants_pen && !(*sample & WM97XX_PEN_DOWN)) { - wm->pen_probably_down = 0; - return RC_PENUP; + /* Sometimes it reads a wrong value the first time. */ + *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); + if (!(*sample & WM97XX_PEN_DOWN)) { + wm->pen_probably_down = 0; + return RC_PENUP; + } } return RC_VALID; |