fbd-dev-led-multicolor: Support red, green, blue and white LED colors

Provide our own supports_color method to specify which colors are
actually implemented by the driver. RGB LEDs could provide different
colors as well such as orange, purple, etc. but those are not supported
yet.

src/fbd-dev-led-multicolor.c

@@ -144,6 +144,26 @@ fbd_dev_led_multicolor_set_color (FbdDevLed           *led,
 }
 
 
+static gboolean
+fbd_dev_led_multicolor_supports_color (FbdDevLed           *led,
+                                       FbdFeedbackLedColor  color)
+{
+  switch(color) {
+    case FBD_FEEDBACK_LED_COLOR_WHITE:
+      return TRUE;
+    case FBD_FEEDBACK_LED_COLOR_RED:
+      return TRUE;
+    case FBD_FEEDBACK_LED_COLOR_GREEN:
+      return TRUE;
+    case FBD_FEEDBACK_LED_COLOR_BLUE:
+      return TRUE;
+    default:
+      g_warning ("Color unsupported: %d", color);
+      return FALSE;
+  }
+}
+
+
 static void
 fbd_dev_led_multicolor_class_init (FbdDevLedMulticolorClass *klass)
 {
@@ -151,6 +171,7 @@ fbd_dev_led_multicolor_class_init (FbdDevLedMulticolorClass *klass)
 
   fbd_dev_led_class->probe = fbd_dev_led_multicolor_probe;
   fbd_dev_led_class->set_color = fbd_dev_led_multicolor_set_color;
+  fbd_dev_led_class->supports_color = fbd_dev_led_multicolor_supports_color;
 }
 
 

tests/test-fbd-dev-led.c

@@ -60,7 +60,7 @@ test_fbd_dev_led_multicolor (FbdUmockdevFixture *fixture, gconstpointer unused)
   led = fbd_dev_led_multicolor_new (dev, &err);
   g_assert_no_error (err);
   g_assert_cmpint (fbd_dev_led_get_max_brightness (led), ==, 248);
-  g_assert_true (fbd_dev_led_supports_color (led, FBD_FEEDBACK_LED_COLOR_RGB));
+  g_assert_true (fbd_dev_led_supports_color (led, FBD_FEEDBACK_LED_COLOR_BLUE));
   g_assert_true (fbd_dev_led_start_periodic (led, 50, 50));
 
   g_assert_finalize_object (led);