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[PATCHv2,3/5] dmaengine: hsu: introduce stubs for the exported functions

Message ID 1444732146-91863-4-git-send-email-heikki.krogerus@linux.intel.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Heikki Krogerus Oct. 13, 2015, 10:29 a.m. UTC 
This allows UART drivers to register HSU DMA Engine without
being forced to use ifdefs.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
---
 include/linux/dma/hsu.h | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/include/linux/dma/hsu.h b/include/linux/dma/hsu.h
index 234393a..765b414 100644
--- a/include/linux/dma/hsu.h
+++ b/include/linux/dma/hsu.h
@@ -38,11 +38,21 @@  struct hsu_dma_chip {
 	struct hsu_dma_platform_data	*pdata;
 };
 
+#if IS_ENABLED(CONFIG_HSU_DMA)
 /* Export to the internal users */
 irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr);
 
 /* Export to the platform drivers */
 int hsu_dma_probe(struct hsu_dma_chip *chip);
 int hsu_dma_remove(struct hsu_dma_chip *chip);
+#else
+static inline irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip,
+				      unsigned short nr)
+{
+	return IRQ_NONE;
+}
+static inline int hsu_dma_probe(struct hsu_dma_chip *chip) { return -ENODEV; }
+static inline int hsu_dma_remove(struct hsu_dma_chip *chip) { return 0; }
+#endif /* CONFIG_HSU_DMA */
 
 #endif /* _DMA_HSU_H */