Input: ti_am335x_tsc: Mark IRQ as wakeup capable

On AM335x, ti_am335x_tsc can wake up the system from suspend, mark the
IRQ as wakeup capable, so that device irq is not disabled during system
suspend.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
index a4f25a915ffc..9e8684ab48f4 100644
--- a/drivers/input/touchscreen/ti_am335x_tsc.c
+++ b/drivers/input/touchscreen/ti_am335x_tsc.c
@@ -27,6 +27,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/sort.h>
+#include <linux/pm_wakeirq.h>
 
 #include <linux/mfd/ti_am335x_tscadc.h>
 
@@ -439,6 +440,9 @@ static int titsc_probe(struct platform_device *pdev)
         }
 
         device_init_wakeup(&pdev->dev, true);
+        err = dev_pm_set_wake_irq(&pdev->dev, ts_dev->irq);
+        if (err)
+                dev_err(&pdev->dev, "irq wake enable failed.\n");
 
         titsc_writel(ts_dev, REG_IRQSTATUS, TSC_IRQENB_MASK);
         titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES);
@@ -471,6 +475,7 @@ static int titsc_probe(struct platform_device *pdev)
         return 0;
 
 err_free_irq:
+        dev_pm_clear_wake_irq(&pdev->dev);
         device_init_wakeup(&pdev->dev, false);
         free_irq(ts_dev->irq, ts_dev);
 err_free_mem:
@@ -484,6 +489,7 @@ static int titsc_remove(struct platform_device *pdev)
         struct titsc *ts_dev = platform_get_drvdata(pdev);
         u32 steps;
 
+        dev_pm_clear_wake_irq(&pdev->dev);
         device_init_wakeup(&pdev->dev, false);
         free_irq(ts_dev->irq, ts_dev);