1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c
index b302833f6f9d..089bad6d85a0 100644
--- a/drivers/media/video/cx18/cx18-gpio.c
+++ b/drivers/media/video/cx18/cx18-gpio.c
@@ -122,3 +122,37 @@ int cx18_reset_tuner_gpio(void *dev, int cmd, int value)
         schedule_timeout_interruptible(msecs_to_jiffies(1));
         return 0;
 }
+
+int cx18_gpio(struct cx18 *cx, unsigned int command, void *arg)
+{
+        struct v4l2_routing *route = arg;
+        u32 mask, data;
+
+        switch (command) {
+        case VIDIOC_INT_S_AUDIO_ROUTING:
+                if (route->input > 2)
+                        return -EINVAL;
+                mask = cx->card->gpio_audio_input.mask;
+                switch (route->input) {
+                case 0:
+                        data = cx->card->gpio_audio_input.tuner;
+                        break;
+                case 1:
+                        data = cx->card->gpio_audio_input.linein;
+                        break;
+                case 2:
+                default:
+                        data = cx->card->gpio_audio_input.radio;
+                        break;
+                }
+                break;
+
+        default:
+                return -EINVAL;
+        }
+        if (mask) {
+                cx->gpio_val = (cx->gpio_val & ~mask) | (data & mask);
+                gpio_write(cx);
+        }
+        return 0;
+}