Patchwork [2/2] Documentation: dt: add an optional dma-desc-enable property for dwc2 usb

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Submitter dinguyen@altera.com
Date May 5, 2014, 10:23 p.m.
Message ID <1399328585-30949-2-git-send-email-dinguyen@altera.com>
Download mbox | patch
Permalink /patch/345968/
State New
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Comments

dinguyen@altera.com - May 5, 2014, 10:23 p.m.
From: Dinh Nguyen <dinguyen@altera.com>

The "dma-desc-enable" property can be used to disable descriptor DMA mode
for the DWC2 USB IP.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
---
 Documentation/devicetree/bindings/usb/dwc2.txt |    5 +++++
 1 file changed, 5 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index b8b6871..37af3bc 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -14,6 +14,11 @@  Refer to clk/clock-bindings.txt for generic clock consumer properties
 Optional properties:
 - phys: phy provider specifier
 - phy-names: shall be "device"
+- dma-desc-enable: This property is used to disable descriptor DMA support.
+	The reason why this property is needed is that even if the HW supports
+	description DMA support, it does not support it for SPLIT transactions.
+	So this property can be used to optionally disable descriptor DMA
+	support.
 Refer to phy/phy-bindings.txt for generic phy consumer properties
 
 Example: