Add wakeup support to the ads7846 driver. Platforms can enable wakeup
capability by setting the wakeup flag in ads7846_platform_data. With this
patch the ads7846 driver can be used to wake the system from suspend.
Signed-off-by: Ranjith Lohithakshan <ranjithl@xxxxxx>
---
drivers/input/touchscreen/ads7846.c | 8 ++++++++
include/linux/spi/ads7846.h | 1 +
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 8b05d8e..38022dd 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -817,6 +817,8 @@ static int ads7846_suspend(struct spi_device *spi, pm_message_t message)
spin_lock_irq(&ts->lock);
ts->is_suspended = 1;
+ if (device_may_wakeup(&ts->spi->dev))
+ enable_irq_wake(ts->spi->irq);
ads7846_disable(ts);
spin_unlock_irq(&ts->lock);
@@ -833,6 +835,8 @@ static int ads7846_resume(struct spi_device *spi)
ts->is_suspended = 0;
ads7846_enable(ts);
+ if (device_may_wakeup(&ts->spi->dev))
+ disable_irq_wake(ts->spi->irq);
spin_unlock_irq(&ts->lock);
@@ -1191,6 +1195,9 @@ static int __devinit ads7846_probe(struct spi_device *spi)
if (err)
goto err_remove_attr_group;
+ if (pdata->wakeup == true)
+ device_init_wakeup(&spi->dev, 1);
+
return 0;
err_remove_attr_group:
@@ -1220,6 +1227,7 @@ static int __devexit ads7846_remove(struct spi_device *spi)
{
struct ads7846 *ts = dev_get_drvdata(&spi->dev);
+ device_init_wakeup(&spi->dev, 0);
ads784x_hwmon_unregister(spi, ts);
input_unregister_device(ts->input);
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index 51948eb..116e611 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -53,5 +53,6 @@ struct ads7846_platform_data {
int (*filter) (void *filter_data, int data_idx, int *val);
void (*filter_cleanup)(void *filter_data);
void (*wait_for_sync)(void);
+ bool wakeup;
};
--
1.6.2.4
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