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[v3,1/5] dmaengine: qcom: bam_dma: make bam clk optional

Message ID 20180215122511.13517-2-srinivas.kandagatla@linaro.org (mailing list archive)
State Not Applicable, archived
Delegated to: Andy Gross
Headers show

Commit Message

Srinivas Kandagatla Feb. 15, 2018, 12:25 p.m. UTC 
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

When BAM is remotely controlled it does not sound correct to control
its clk on Linux side. Make it optional, so that its not mandatory
for remote controlled BAM instances.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 drivers/dma/qcom/bam_dma.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index d076940e0c69..b79691fcc82d 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -1233,8 +1233,12 @@  static int bam_dma_probe(struct platform_device *pdev)
 						"qcom,controlled-remotely");
 
 	bdev->bamclk = devm_clk_get(bdev->dev, "bam_clk");
-	if (IS_ERR(bdev->bamclk))
-		return PTR_ERR(bdev->bamclk);
+	if (IS_ERR(bdev->bamclk)) {
+		if (!bdev->controlled_remotely)
+			return PTR_ERR(bdev->bamclk);
+
+		bdev->bamclk = NULL;
+	}
 
 	ret = clk_prepare_enable(bdev->bamclk);
 	if (ret) {