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fee1dc0282
This patch documents the device tree bindings required for the ehci on-chip controller found in ST consumer electronics SoC's. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
ST USB EHCI controller
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Required properties:
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- compatible : must be "st,st-ehci-300x"
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- reg : physical base addresses of the controller and length of memory mapped
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region
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- interrupts : one EHCI interrupt should be described here
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- pinctrl-names : a pinctrl state named "default" must be defined
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- pinctrl-0 : phandle referencing pin configuration of the USB controller
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See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
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- clocks : phandle list of usb clocks
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- clock-names : should be "ic" for interconnect clock and "clk48"
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See: Documentation/devicetree/bindings/clock/clock-bindings.txt
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- phys : phandle for the PHY device
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- phy-names : should be "usb"
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- resets : phandle + reset specifier pairs to the powerdown and softreset lines
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of the USB IP
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- reset-names : should be "power" and "softreset"
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See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
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See: Documentation/devicetree/bindings/reset/reset.txt
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Example:
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ehci1: usb@0xfe203e00 {
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compatible = "st,st-ehci-300x";
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reg = <0xfe203e00 0x100>;
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interrupts = <GIC_SPI 148 IRQ_TYPE_NONE>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_usb1>;
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clocks = <&clk_s_a1_ls 0>;
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phys = <&usb2_phy>;
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phy-names = "usb";
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status = "okay";
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resets = <&powerdown STIH416_USB1_POWERDOWN>,
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<&softreset STIH416_USB1_SOFTRESET>;
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reset-names = "power", "softreset";
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};
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