On some platforms, for example with GPIO interrupts
on mpc5121, it is not possible to configure falling edge
interrupts.
Specifying irq trigger type in platform data structure
allows using ads7846 driver on such platforms.
Signed-off-by: Anatolij Gustschin <agust@xxxxxxx>
---
drivers/input/touchscreen/ads7846.c | 5 ++++-
include/linux/spi/ads7846.h | 1 +
2 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 532279c..9cfc865 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -1174,7 +1174,10 @@ static int __devinit ads7846_probe(struct spi_device *spi)
goto err_put_regulator;
}
- if (request_irq(spi->irq, ads7846_irq, IRQF_TRIGGER_FALLING,
+ if (!pdata->irq_trigger)
+ pdata->irq_trigger = IRQF_TRIGGER_FALLING;
+
+ if (request_irq(spi->irq, ads7846_irq, pdata->irq_trigger,
spi->dev.driver->name, ts)) {
dev_info(&spi->dev,
"trying pin change workaround on irq %d\n", spi->irq);
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index b4ae570..32e34ba 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -54,5 +54,6 @@ struct ads7846_platform_data {
void (*filter_cleanup)(void *filter_data);
void (*wait_for_sync)(void);
bool wakeup;
+ u8 irq_trigger;
};
--
1.6.3.3
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