There has been more than 3 instances of this helper in multiple codec
drivers, it does not make sense to keep duplicating this part of code.

Lets add a helper of_sdw_find_device_by_node for codec drivers to use it.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/soundwire/slave.c     | 6 ++++++
 include/linux/soundwire/sdw.h | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index d2d99555ec5a..3d4d00188c26 100644
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -273,4 +273,10 @@ int sdw_of_find_slaves(struct sdw_bus *bus)
 	return 0;
 }
 
+struct device *of_sdw_find_device_by_node(struct device_node *np)
+{
+	return bus_find_device_by_of_node(&sdw_bus_type, np);
+}
+EXPORT_SYMBOL_GPL(of_sdw_find_device_by_node);
+
 MODULE_IMPORT_NS("SND_SOC_SDCA");
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 0832776262ac..096213956d31 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -19,6 +19,7 @@
 
 struct dentry;
 struct fwnode_handle;
+struct device_node;
 
 struct sdw_bus;
 struct sdw_slave;
@@ -1086,6 +1087,8 @@ int sdw_stream_add_slave(struct sdw_slave *slave,
 int sdw_stream_remove_slave(struct sdw_slave *slave,
 			    struct sdw_stream_runtime *stream);
 
+struct device *of_sdw_find_device_by_node(struct device_node *np);
+
 int sdw_slave_get_scale_index(struct sdw_slave *slave, u8 *base);
 
 /* messaging and data APIs */
@@ -1119,6 +1122,12 @@ static inline int sdw_stream_remove_slave(struct sdw_slave *slave,
 	return -EINVAL;
 }
 
+static inline struct device *of_sdw_find_device_by_node(struct device_node *np)
+{
+	WARN_ONCE(1, "SoundWire API is disabled");
+	return NULL;
+}
+
 /* messaging and data APIs */
 static inline int sdw_read(struct sdw_slave *slave, u32 addr)
 {
-- 
2.50.0