linux-kernel - [PATCH v4 2/4] dmaengine: dw: provide probe(), remove() stubs for users

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Message-Id: <1461250994-62090-3-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Thu, 21 Apr 2016 18:03:12 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Viresh Kumar <vireshk@...nel.org>,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Vineet Gupta <vgupta@...opsys.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v4 2/4] 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().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 include/linux/dma/dw.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/dma/dw.h b/include/linux/dma/dw.h
index f2e538a..ccfd0c3 100644
--- 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;
-- 
2.8.0.rc3