1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 8b05d8e97543..532279cda0e4 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -36,6 +36,7 @@
  * TSC2046 is just newer ads7846 silicon.
  * Support for ads7843 tested on Atmel at91sam926x-EK.
  * Support for ads7845 has only been stubbed in.
+ * Support for Analog Devices AD7873 and AD7843 tested.
  *
  * IRQ handling needs a workaround because of a shortcoming in handling
  * edge triggered IRQs on some platforms like the OMAP1/2. These
@@ -821,6 +822,9 @@ static int ads7846_suspend(struct spi_device *spi, pm_message_t message)
 
         spin_unlock_irq(&ts->lock);
 
+        if (device_may_wakeup(&ts->spi->dev))
+                enable_irq_wake(ts->spi->irq);
+
         return 0;
 
 }
@@ -829,6 +833,9 @@ static int ads7846_resume(struct spi_device *spi)
 {
         struct ads7846 *ts = dev_get_drvdata(&spi->dev);
 
+        if (device_may_wakeup(&ts->spi->dev))
+                disable_irq_wake(ts->spi->irq);
+
         spin_lock_irq(&ts->lock);
 
         ts->is_suspended = 0;
@@ -984,6 +991,15 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 
         vref = pdata->keep_vref_on;
 
+        if (ts->model == 7873) {
+                /* The AD7873 is almost identical to the ADS7846
+                 * keep VREF off during differential/ratiometric
+                 * conversion modes
+                 */
+                ts->model = 7846;
+                vref = 0;
+        }
+
         /* set up the transfers to read touchscreen state; this assumes we
          * use formula #2 for pressure, not #3.
          */
@@ -1191,6 +1207,8 @@ static int __devinit ads7846_probe(struct spi_device *spi)
         if (err)
                 goto err_remove_attr_group;
 
+        device_init_wakeup(&spi->dev, pdata->wakeup);
+
         return 0;
 
  err_remove_attr_group:
@@ -1220,6 +1238,8 @@ static int __devexit ads7846_remove(struct spi_device *spi)
 {
         struct ads7846          *ts = dev_get_drvdata(&spi->dev);
 
+        device_init_wakeup(&spi->dev, false);
+
         ads784x_hwmon_unregister(spi, ts);
         input_unregister_device(ts->input);