dmaengine: dw: provide probe(), remove() stubs for users

Some users consider DMA optional, thus when driver is not compiled we shouldn't
prevent compilation of the users. Add stubs for dw_dma_probe() and
dw_dma_remove().

Acked-by: Vinod Koul <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Tested-by: Bryan O'Donoghue <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

diff --git a/include/linux/dma/dw.h b/include/linux/dma/dw.h
index f2e538aaddadc55d43c5463375c4de36ab37bc83..ccfd0c3777df20d2bd9c6cd1518673643369c1ad 100644 (file)
--- a/include/linux/dma/dw.h
+++ b/include/linux/dma/dw.h
@@ -40,8 +40,13 @@ struct dw_dma_chip {
 };
 
 /* Export to the platform drivers */
+#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
 int dw_dma_probe(struct dw_dma_chip *chip);
 int dw_dma_remove(struct dw_dma_chip *chip);
+#else
+static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
+static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
+#endif /* CONFIG_DW_DMAC_CORE */
 
 /* DMA API extensions */
 struct dw_desc;