ASoC: wcd938x: Add support for codec wakeup

Add an API to wakeup codec from sleep.

Change-Id: I90de653947f794cbc4a47a91bd5f22251440ef75
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>

asoc/codecs/wcd938x/internal.h

@@ -79,7 +79,6 @@ struct wcd938x_priv {
 	struct codec_port_info
 			rx_port_mapping[MAX_PORT][MAX_CH_PER_PORT];
 	struct regulator_bulk_data *supplies;
-
 	struct notifier_block nblock;
 	/* wcd callback to bolero */
 	void *handle;
@@ -87,6 +86,7 @@ struct wcd938x_priv {
 	int (*register_notifier)(void *handle,
 				struct notifier_block *nblock,
 				bool enable);
+	int (*wakeup)(void *handle, bool enable);
 	u32 version;
 	/* Entry for version info */
 	struct snd_info_entry *entry;

asoc/codecs/wcd938x/wcd938x.c

@@ -2578,6 +2578,25 @@ static int wcd938x_add_slave_components(struct device *dev,
 	return 0;
 }
 
+static int wcd938x_wakeup(void *handle, bool enable)
+{
+	struct wcd938x_priv *priv;
+
+	if (!handle) {
+		pr_err("%s: NULL handle\n", __func__);
+		return -EINVAL;
+	}
+	priv = (struct wcd938x_priv *)handle;
+	if (!priv->tx_swr_dev) {
+		pr_err("%s: tx swr dev is NULL\n", __func__);
+		return -EINVAL;
+	}
+	if (enable)
+		return swr_device_wakeup_vote(priv->tx_swr_dev);
+	else
+		return swr_device_wakeup_unvote(priv->tx_swr_dev);
+}
+
 static int wcd938x_probe(struct platform_device *pdev)
 {
 	struct component_match *match = NULL;
@@ -2652,6 +2671,8 @@ static int wcd938x_probe(struct platform_device *pdev)
 
 	wcd938x_reset(dev);
 
+	wcd938x->wakeup = wcd938x_wakeup;
+
 	return component_master_add_with_match(&pdev->dev,
 					&wcd938x_comp_ops, match);