fbd-dev-led: Support LEDs with legacy naming

As noted in include/dt-bindings/leds/common.h in the Linux kernel, the Nokia
N900 has leds that use legacy naming. Until this naming scheme is removed from
the kernel, support it through the use of an additional FEEDBACKD_LED_COLOR
udev property, which must be set to the color corresponding to the LED.

Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com>

src/fbd-dev-led.c

@@ -51,11 +51,12 @@ static gboolean
 fbd_dev_led_probe_default (FbdDevLed *led, GError **error)
 {
   FbdDevLedPrivate *priv = fbd_dev_led_get_instance_private (led);
-  const gchar *name, *path;
+  const gchar *name, *path, *hint;
   gboolean success = FALSE;
   const char *pattern;
 
   name = g_udev_device_get_name (priv->dev);
+  hint = g_udev_device_get_property (priv->dev, "FEEDBACKD_LED_COLOR");
   pattern = g_udev_device_get_sysfs_attr (priv->dev, LED_PATTERN_ATTR);
   if (!pattern) {
     g_set_error (error,
@@ -72,7 +73,7 @@ fbd_dev_led_probe_default (FbdDevLed *led, GError **error)
     enum_name = g_enum_to_string (FBD_TYPE_FEEDBACK_LED_COLOR, i);
     c = strrchr (enum_name, '_');
     color = g_ascii_strdown (c+1, -1);
-    if (g_strstr_len (name, -1, color)) {
+    if (g_strstr_len (name, -1, color) || !g_strcmp0 (hint, color)) {
       guint brightness = g_udev_device_get_sysfs_attr_as_int (priv->dev, LED_MAX_BRIGHTNESS_ATTR);
 
       if (!brightness)