Input: rotary-encoder - set gpio direction for each requested gpio

Even with the correct pin mux settings, you still need to explicitly
set the gpio direction. Call gpio_direction_input() after each
requested gpio.

Signed-off-by: Andrew Clayton <andrew@digital-domain.net>
Signed-off-by: Mark Somerville <mark@scottishclimbs.com>
Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c
index 3b9f588fc747..4ae07935985e 100644
--- a/drivers/input/misc/rotary_encoder.c
+++ b/drivers/input/misc/rotary_encoder.c
@@ -152,6 +152,13 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
                 goto exit_unregister_input;
         }
 
+        err = gpio_direction_input(pdata->gpio_a);
+        if (err) {
+                dev_err(&pdev->dev, "unable to set GPIO %d for input\n",
+                        pdata->gpio_a);
+                goto exit_unregister_input;
+        }
+
         err = gpio_request(pdata->gpio_b, DRV_NAME);
         if (err) {
                 dev_err(&pdev->dev, "unable to request GPIO %d\n",
@@ -159,6 +166,13 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
                 goto exit_free_gpio_a;
         }
 
+        err = gpio_direction_input(pdata->gpio_b);
+        if (err) {
+                dev_err(&pdev->dev, "unable to set GPIO %d for input\n",
+                        pdata->gpio_b);
+                goto exit_free_gpio_a;
+        }
+
         /* request the IRQs */
         err = request_irq(encoder->irq_a, &rotary_encoder_irq,
                           IORESOURCE_IRQ_HIGHEDGE | IORESOURCE_IRQ_LOWEDGE,