linux-kernel - [PATCH] usb: chipidea: Configure DMA properties and ops from DT

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Date:	Sun, 21 Feb 2016 21:32:13 -0800
From:	Bjorn Andersson <bjorn.andersson@...aro.org>
To:	Peter Chen <Peter.Chen@....com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	linux-usb@...r.kernel.org,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usb: chipidea: Configure DMA properties and ops from DT

On certain platforms (e.g. ARM64) the dma_ops needs to be explicitly set
to be able to do DMA allocations, so use the of_dma_configure() helper
to populate the dma properties and assign an appropriate dma_ops.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 drivers/usb/chipidea/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 7404064b9bbc..047b9d4e67aa 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -62,6 +62,7 @@
 #include <linux/usb/chipidea.h>
 #include <linux/usb/of.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/phy.h>
 #include <linux/regulator/consumer.h>
 #include <linux/usb/ehci_def.h>
@@ -834,6 +835,9 @@ struct platform_device *ci_hdrc_add_device(struct device *dev,
 	pdev->dev.dma_parms = dev->dma_parms;
 	dma_set_coherent_mask(&pdev->dev, dev->coherent_dma_mask);
 
+	if (IS_ENABLED(CONFIG_OF) && dev->of_node)
+		of_dma_configure(&pdev->dev, dev->of_node);
+
 	ret = platform_device_add_resources(pdev, res, nres);
 	if (ret)
 		goto err;
-- 
2.5.0