[PATCH 04/10] Doc: usb: ci-hdrc-usb2: add ahb-burst-config for binding doc

[Peter Chen <peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org>]

It is used to change ahb burst configuration for platforms, it is
vendor specific.

Signed-off-by: Peter Chen <peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
---
 Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index 4159c8c..3c377a3 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -32,6 +32,8 @@ Optional properties:
 - external-vbus-divider: (FSL only) enables off-chip resistor divider for Vbus
 - itc-setting: interrupt threshold control register control, the setting
   should be aligned with ITC bits at register USBCMD.
+- ahb-burst-config: it is vendor dependent, the required value should be
+  aligned with AHBBRST at SBUSCFG, the range is from 0x0 to 0x7.
 
 Example:
 
@@ -44,4 +46,6 @@ Example:
 		phy-names = "usb-phy";
 		vbus-supply = <&reg_usb0_vbus>;
 		gadget-itc-setting = <0x4>; /* 4 micro-frames */
+		 /* Incremental burst of unspecified length */
+		ahb-burst-config = <0x0>;
 	};
-- 
1.9.1

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