ASoC: Add data based control initialisation for CODECs and cards

Allow CODEC and card drivers to point to an array of controls from their
driver structure rather than explicitly calling snd_soc_add_controls().

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/soc.h

@@ -577,7 +577,9 @@ struct snd_soc_codec_driver {
 			pm_message_t state);
 	int (*resume)(struct snd_soc_codec *);
 
-	/* Default DAPM setup, added after probe() is run */
+	/* Default control and setup, added after probe() is run */
+	const struct snd_kcontrol_new *controls;
+	int num_controls;
 	const struct snd_soc_dapm_widget *dapm_widgets;
 	int num_dapm_widgets;
 	const struct snd_soc_dapm_route *dapm_routes;
@@ -747,6 +749,9 @@ struct snd_soc_card {
 	struct snd_soc_pcm_runtime *rtd_aux;
 	int num_aux_rtd;
 
+	const struct snd_kcontrol_new *controls;
+	int num_controls;
+
 	/*
 	 * Card-specific routes and widgets.
 	 */

sound/soc/soc-core.c

@@ -1493,6 +1493,9 @@ static int soc_probe_codec(struct snd_soc_card *card,
 		}
 	}
 
+	if (driver->controls)
+		snd_soc_add_controls(codec, driver->controls,
+				     driver->num_controls);
 	if (driver->dapm_widgets)
 		snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
 					  driver->num_dapm_widgets);
@@ -1890,6 +1893,14 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 		}
 	}
 
+	/* We should have a non-codec control add function but we don't */
+	if (card->controls)
+		snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
+						      struct snd_soc_codec,
+						      card_list),
+				     card->controls,
+				     card->num_controls);
+
 	if (card->dapm_widgets)
 		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
 					  card->num_dapm_widgets);