mwifiex: Introduce mwifiex_probe_of() to parse common properties

Introduce function mwifiex_probe_of() to parse common properties.
Interface drivers get to decide whether or not the device tree node
was a valid one (depending on the compatible property),
Lets fill "adapter->dt_node" in mwifiex_add_card().

The function mwifiex_probe_of() is currently only a place holder with
the next patch adding content to it.
Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/main.c

@@ -1552,6 +1552,16 @@ void mwifiex_do_flr(struct mwifiex_adapter *adapter, bool prepare)
 }
 EXPORT_SYMBOL_GPL(mwifiex_do_flr);
 
+static void mwifiex_probe_of(struct mwifiex_adapter *adapter)
+{
+	struct device *dev = adapter->dev;
+
+	if (!dev->of_node)
+		return;
+
+	adapter->dt_node = dev->of_node;
+}
+
 /*
  * This function adds the card.
  *
@@ -1581,6 +1591,8 @@ mwifiex_add_card(void *card, struct semaphore *sem,
 	}
 
 	adapter->dev = dev;
+	mwifiex_probe_of(adapter);
+
 	adapter->iface_type = iface_type;
 	adapter->card_sem = sem;
 

drivers/net/wireless/marvell/mwifiex/sta_cmd.c

@@ -2235,10 +2235,7 @@ int mwifiex_sta_init_cmd(struct mwifiex_private *priv, u8 first_sta, bool init)
 		 * The cal-data can be read from device tree and/or
 		 * a configuration file and downloaded to firmware.
 		 */
-		if ((priv->adapter->iface_type == MWIFIEX_SDIO ||
-		    priv->adapter->iface_type == MWIFIEX_PCIE) &&
-		    adapter->dev->of_node) {
-			adapter->dt_node = adapter->dev->of_node;
+		if (adapter->dt_node) {
 			if (of_property_read_u32(adapter->dt_node,
 						 "marvell,wakeup-pin",
 						 &data) == 0) {