ASoC: max9877: Add basic DAPM support

This does not fully map the power control available within the device
but it provides the hooks for routing signals through the device and
allows automatic management of the device low power mode.

Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/max9877.c

@@ -87,15 +87,50 @@ static const struct snd_kcontrol_new max9877_controls[] = {
 		   MAX9877_INPUT_MODE, 6, 1, 0),
 	SOC_SINGLE("MAX9877 Bypass Mode Switch",
 		   MAX9877_OUTPUT_MODE, 6, 1, 0),
-	SOC_SINGLE("MAX9877 Shutdown Mode Switch",
-		   MAX9877_OUTPUT_MODE, 7, 1, 1),
 	SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
 	SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
 };
 
+static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
+SND_SOC_DAPM_INPUT("INA1"),
+SND_SOC_DAPM_INPUT("INA2"),
+SND_SOC_DAPM_INPUT("INB1"),
+SND_SOC_DAPM_INPUT("INB2"),
+SND_SOC_DAPM_INPUT("RXIN+"),
+SND_SOC_DAPM_INPUT("RXIN-"),
+
+SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
+
+SND_SOC_DAPM_OUTPUT("OUT+"),
+SND_SOC_DAPM_OUTPUT("OUT-"),
+SND_SOC_DAPM_OUTPUT("HPL"),
+SND_SOC_DAPM_OUTPUT("HPR"),
+};
+
+static const struct snd_soc_dapm_route max9877_dapm_routes[] = {
+	{ "SHDN", NULL, "INA1" },
+	{ "SHDN", NULL, "INA2" },
+	{ "SHDN", NULL, "INB1" },
+	{ "SHDN", NULL, "INB2" },
+
+	{ "OUT+", NULL, "RXIN+" },
+	{ "OUT+", NULL, "SHDN" },
+
+	{ "OUT-", NULL, "SHDN" },
+	{ "OUT-", NULL, "RXIN-" },
+
+	{ "HPL", NULL, "SHDN" },
+	{ "HPR", NULL, "SHDN" },
+};
+
 static const struct snd_soc_codec_driver max9877_codec = {
 	.controls = max9877_controls,
 	.num_controls = ARRAY_SIZE(max9877_controls),
+
+	.dapm_widgets = max9877_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets),
+	.dapm_routes = max9877_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes),
 };
 
 static const struct regmap_config max9877_regmap = {