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-rw-r--r--kernel/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt58
1 files changed, 57 insertions, 1 deletions
diff --git a/kernel/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/kernel/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index 27f8b1e5e..781296bfb 100644
--- a/kernel/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/kernel/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -1,15 +1,64 @@
* USB2 ChipIdea USB controller for ci13xxx
Required properties:
-- compatible: should be "chipidea,usb2"
+- compatible: should be one of:
+ "fsl,imx27-usb"
+ "lsi,zevio-usb"
+ "qcom,ci-hdrc"
+ "chipidea,usb2"
+ "xlnx,zynq-usb-2.20a"
- reg: base address and length of the registers
- interrupts: interrupt for the USB controller
+Recommended properies:
+- phy_type: the type of the phy connected to the core. Should be one
+ of "utmi", "utmi_wide", "ulpi", "serial" or "hsic". Without this
+ property the PORTSC register won't be touched.
+- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg"
+
+Deprecated properties:
+- usb-phy: phandle for the PHY device. Use "phys" instead.
+- fsl,usbphy: phandle of usb phy that connects to the port. Use "phys" instead.
+
Optional properties:
- clocks: reference to the USB clock
- phys: reference to the USB PHY
- phy-names: should be "usb-phy"
- vbus-supply: reference to the VBUS regulator
+- maximum-speed: limit the maximum connection speed to "full-speed".
+- tpl-support: TPL (Targeted Peripheral List) feature for targeted hosts
+- 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.
+- tx-burst-size-dword: it is vendor dependent, the tx burst size in dword
+ (4 bytes), This register represents the maximum length of a the burst
+ in 32-bit words while moving data from system memory to the USB
+ bus, the value of this property will only take effect if property
+ "ahb-burst-config" is set to 0, if this property is missing the reset
+ default of the hardware implementation will be used.
+- rx-burst-size-dword: it is vendor dependent, the rx burst size in dword
+ (4 bytes), This register represents the maximum length of a the burst
+ in 32-bit words while moving data from the USB bus to system memory,
+ the value of this property will only take effect if property
+ "ahb-burst-config" is set to 0, if this property is missing the reset
+ default of the hardware implementation will be used.
+- extcon: phandles to external connector devices. First phandle should point to
+ external connector, which provide "USB" cable events, the second should point
+ to external connector device, which provide "USB-HOST" cable events. If one
+ of the external connector devices is not required, empty <0> phandle should
+ be specified.
+- phy-clkgate-delay-us: the delay time (us) between putting the PHY into
+ low power mode and gating the PHY clock.
+
+i.mx specific properties
+- fsl,usbmisc: phandler of non-core register device, with one
+ argument that indicate usb controller index
+- disable-over-current: disable over current detect
+- external-vbus-divider: enables off-chip resistor divider for Vbus
Example:
@@ -21,4 +70,11 @@ Example:
phys = <&usb_phy0>;
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>;
+ tx-burst-size-dword = <0x10>; /* 64 bytes */
+ rx-burst-size-dword = <0x10>;
+ extcon = <0>, <&usb_id>;
+ phy-clkgate-delay-us = <400>;
};