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: Peter Chen <peter.chen@freescale.com>
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@ -32,6 +32,11 @@ Optional properties:
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- external-vbus-divider: (FSL only) enables off-chip resistor divider for Vbus
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- external-vbus-divider: (FSL only) enables off-chip resistor divider for Vbus
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- itc-setting: interrupt threshold control register control, the setting
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- itc-setting: interrupt threshold control register control, the setting
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should be aligned with ITC bits at register USBCMD.
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should be aligned with ITC bits at register USBCMD.
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- ahb-burst-config: it is vendor dependent, the required value should be
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aligned with AHBBRST at SBUSCFG, the range is from 0x0 to 0x7. This
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property is used to change AHB burst configuration, check the chipidea
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spec for meaning of each value. If this property is not existed, it
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will use the reset value.
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Example:
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Example:
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@ -44,4 +49,6 @@ Example:
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phy-names = "usb-phy";
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phy-names = "usb-phy";
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vbus-supply = <®_usb0_vbus>;
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vbus-supply = <®_usb0_vbus>;
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gadget-itc-setting = <0x4>; /* 4 micro-frames */
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gadget-itc-setting = <0x4>; /* 4 micro-frames */
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/* Incremental burst of unspecified length */
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ahb-burst-config = <0x0>;
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};
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};
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