diff options
Diffstat (limited to 'drivers/input/touchscreen/ads7846.c')
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 7c27c8b9b6d0..cf7e69766b2b 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -127,6 +127,8 @@ struct ads7846 { void (*filter_cleanup)(void *data); int (*get_pendown_state)(void); int gpio_pendown; + + void (*wait_for_sync)(void); }; /* leave chip selected when we're done, for quicker re-select? */ @@ -511,6 +513,10 @@ static int get_pendown_state(struct ads7846 *ts) return !gpio_get_value(ts->gpio_pendown); } +static void null_wait_for_sync(void) +{ +} + /* * PENIRQ only kicks the timer. The timer only reissues the SPI transfer, * to retrieve touchscreen status. @@ -686,6 +692,7 @@ static void ads7846_rx_val(void *ads) default: BUG(); } + ts->wait_for_sync(); status = spi_async(ts->spi, m); if (status) dev_err(&ts->spi->dev, "spi_async --> %d\n", @@ -723,6 +730,7 @@ static enum hrtimer_restart ads7846_timer(struct hrtimer *handle) } else { /* pen is still down, continue with the measurement */ ts->msg_idx = 0; + ts->wait_for_sync(); status = spi_async(ts->spi, &ts->msg[0]); if (status) dev_err(&ts->spi->dev, "spi_async --> %d\n", status); @@ -947,6 +955,8 @@ static int __devinit ads7846_probe(struct spi_device *spi) ts->penirq_recheck_delay_usecs = pdata->penirq_recheck_delay_usecs; + ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync; + snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev)); input_dev->name = "ADS784x Touchscreen"; |