[alsa-devel] [PATCH 01/24 v2] dmaengine: export symbol of of_dma_request_slave_channel()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

Current DMAEngine implementation of DT bindings can't support
DT subnode. This patch export symbols of of_dma_request_slave_channel()
for subnode DMA DT bingings.

ex)

rcar_sound: rcar_sound at ec500000 {
	...
	rcar_sound,dvc {
		dvc0: dvc at 0 {
			dmas = <&audma0 0xbc>;
			dma-names = "tx";
		};
		dvc1: dvc at 1 {
			dmas = <&audma0 0xbe>;
			dma-names = "tx";
		};
	};
	...
};

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
v1 -> v2

 - new patch

 drivers/dma/of-dma.c   |    1 +
 include/linux/of_dma.h |    4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
index ca31f1b..cbd4a8a 100644
--- a/drivers/dma/of-dma.c
+++ b/drivers/dma/of-dma.c
@@ -194,6 +194,7 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
 
 	return ERR_PTR(ret_no_channel);
 }
+EXPORT_SYMBOL_GPL(of_dma_request_slave_channel);
 
 /**
  * of_dma_simple_xlate - Simple DMA engine translation function
diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
index 56bc026..687a0ac 100644
--- a/include/linux/of_dma.h
+++ b/include/linux/of_dma.h
@@ -37,8 +37,8 @@ extern int of_dma_controller_register(struct device_node *np,
 		(struct of_phandle_args *, struct of_dma *),
 		void *data);
 extern void of_dma_controller_free(struct device_node *np);
-extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
-						     const char *name);
+struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
+					      const char *name);
 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
 		struct of_dma *ofdma);
 extern struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
-- 
1.7.9.5