From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
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@ec500000 {
...
rcar_sound,dvc {
dvc0: dvc@0 {
dmas = <&audma0 0xbc>;
dma-names = "tx";
};
dvc1: dvc@1 {
dmas = <&audma0 0xbe>;
dma-names = "tx";
};
};
...
};
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
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
--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
