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Commit c6fba7b7 authored by Peter Chen's avatar Peter Chen
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Doc: usb: ci-hdrc-usb2: add ahb-burst-config for binding doc 



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

Signed-off-by: default avatarPeter Chen <peter.chen@freescale.com>
parent 0ef877a4

Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt

+7 −0
Original line number Diff line number Diff line
@@ -32,6 +32,11 @@ 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. This

  property is used to change AHB burst configuration, check the chipidea

  spec for meaning of each value. If this property is not existed, it

  will use the reset value.



Example:
@@ -44,4 +49,6 @@ 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>;

	};