linux-kernel - Re: [PATCH v2 1/2] dt-bindings: usb: Add binding for the TI wrapper for Cadence USB3 controller

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Date:   Thu, 24 Oct 2019 13:16:50 +0300
From:   Roger Quadros <rogerq@...com>
To:     <felipe.balbi@...ux.intel.com>, <gregkh@...uxfoundation.org>
CC:     <pawell@...ence.com>, <peter.chen@....com>, <nsekhar@...com>,
        <kurahul@...ence.com>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: usb: Add binding for the TI wrapper
 for Cadence USB3 controller

Hi,

On 21/10/2019 16:13, Roger Quadros wrote:
> TI platforms have a wrapper module around the Cadence USB3
> controller. Add binding information for that.

Please ignore this. I missed converting this to yaml format.
Will send v3.

cheers,
-roger
> 
> Cc: Rob Herring <robh@...nel.org>
> Signed-off-by: Roger Quadros <rogerq@...com>
> Signed-off-by: Sekhar Nori <nsekhar@...com>
> ---
>   .../devicetree/bindings/usb/ti,j721e-usb.txt  | 52 +++++++++++++++++++
>   1 file changed, 52 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/usb/ti,j721e-usb.txt
> 
> diff --git a/Documentation/devicetree/bindings/usb/ti,j721e-usb.txt b/Documentation/devicetree/bindings/usb/ti,j721e-usb.txt
> new file mode 100644
> index 000000000000..bac57c26b09b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/ti,j721e-usb.txt
> @@ -0,0 +1,52 @@
> +Binding for the TI specific wrapper for the Cadence USBSS-DRD controller
> +
> +Required properties:
> +  - compatible: Should contain "ti,j721e-usb"
> +  - reg: Physical base address and size of the wrappers register area.
> +  - power-domains: Should contain a phandle to a PM domain provider node
> +                   and an args specifier containing the USB device id
> +                   value. This property is as per the binding documentation:
> +                   Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
> +  - clocks: Clock phandles to usb2_refclk and lpm_clk
> +  - clock-names: Should contain "ref" and "lpm"
> +
> +Optional properties:
> + - ti,usb2-only: If present, it restricts the controller to USB2.0 mode of
> +		 operation. Must be present if USB3 PHY is not available
> +		 for USB.
> + - ti,vbus-divider: Should be present if USB VBUS line is connected to the
> +		 VBUS pin of the SoC via a 1/3 voltage divider.
> +
> +Sub-nodes:
> +The USB2 PHY and the Cadence USB3 controller should be the sub-nodes.
> +
> +Example:
> +
> +	ti_usb0: cdns_usb@...4000 {
> +		compatible = "ti,j721e-usb";
> +		reg = <0x00 0x4104000 0x00 0x100>;
> +		power-domains = <&k3_pds 288 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 288 15>, <&k3_clks 288 3>;
> +		clock-names = "ref", "lpm";
> +		assigned-clocks = <&k3_clks 288 15>;	/* USB2_REFCLK */
> +		assigned-clock-parents = <&k3_clks 288 16>; /* HFOSC0 */
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		usb0: usb@...0000 {
> +			compatible = "cdns,usb3";
> +			reg = <0x00 0x6000000 0x00 0x10000>,
> +			      <0x00 0x6010000 0x00 0x10000>,
> +			      <0x00 0x6020000 0x00 0x10000>;
> +			reg-names = "otg", "xhci", "dev";
> +			interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>,	/* irq.0 */
> +				     <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,	/* irq.6 */
> +				     <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;	/* otgirq.0 */
> +			interrupt-names = "host",
> +					  "peripheral",
> +					  "otg";
> +			maximum-speed = "super-speed";
> +			dr_mode = "otg";
> +		};
> +	};
> 

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