diff options
Diffstat (limited to 'drivers/input/touchscreen/wm9705.c')
| -rw-r--r-- | drivers/input/touchscreen/wm9705.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/input/touchscreen/wm9705.c b/drivers/input/touchscreen/wm9705.c index 98e61175d3f5..adc13a523ab5 100644 --- a/drivers/input/touchscreen/wm9705.c +++ b/drivers/input/touchscreen/wm9705.c @@ -215,8 +215,9 @@ static inline int is_pden(struct wm97xx *wm) static int wm9705_poll_sample(struct wm97xx *wm, int adcsel, int *sample) { int timeout = 5 * delay; + bool wants_pen = adcsel & WM97XX_PEN_DOWN; - if (!wm->pen_probably_down) { + if (wants_pen && !wm->pen_probably_down) { u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); if (!(data & WM97XX_PEN_DOWN)) return RC_PENUP; @@ -224,13 +225,10 @@ static int wm9705_poll_sample(struct wm97xx *wm, int adcsel, int *sample) } /* set up digitiser */ - if (adcsel & 0x8000) - adcsel = ((adcsel & 0x7fff) + 3) << 12; - if (wm->mach_ops && wm->mach_ops->pre_sample) wm->mach_ops->pre_sample(adcsel); - wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, - adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, (adcsel & WM97XX_ADCSEL_MASK) + | WM97XX_POLL | WM97XX_DELAY(delay)); /* wait 3 AC97 time slots + delay for conversion */ poll_delay(delay); @@ -256,13 +254,14 @@ static int wm9705_poll_sample(struct wm97xx *wm, int adcsel, int *sample) wm->mach_ops->post_sample(adcsel); /* check we have correct sample */ - if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { - dev_dbg(wm->dev, "adc wrong sample, read %x got %x", adcsel, - *sample & WM97XX_ADCSEL_MASK); + if ((*sample ^ adcsel) & WM97XX_ADCSEL_MASK) { + dev_dbg(wm->dev, "adc wrong sample, wanted %x got %x", + adcsel & WM97XX_ADCSEL_MASK, + *sample & WM97XX_ADCSEL_MASK); return RC_PENUP; } - if (!(*sample & WM97XX_PEN_DOWN)) { + if (wants_pen && !(*sample & WM97XX_PEN_DOWN)) { wm->pen_probably_down = 0; return RC_PENUP; } @@ -277,14 +276,14 @@ static int wm9705_poll_touch(struct wm97xx *wm, struct wm97xx_data *data) { int rc; - rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X, &data->x); + rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X | WM97XX_PEN_DOWN, &data->x); if (rc != RC_VALID) return rc; - rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y); + rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y | WM97XX_PEN_DOWN, &data->y); if (rc != RC_VALID) return rc; if (pil) { - rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p); + rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES | WM97XX_PEN_DOWN, &data->p); if (rc != RC_VALID) return rc; } else |