linux-kernel - Re: [PATCH 4/8] dt-bindings: usb: dwc3: Add Amlogic G12A DWC3 Glue Bindings

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Date:   Sun, 24 Feb 2019 20:52:40 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     gregkh@...uxfoundation.org, hminas@...opsys.com, balbi@...nel.org,
        kishon@...com, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 4/8] dt-bindings: usb: dwc3: Add Amlogic G12A DWC3 Glue Bindings

Hi Neil,

On Tue, Feb 12, 2019 at 4:15 PM Neil Armstrong <narmstrong@...libre.com> wrote:
[...]
> +
> +Example device nodes:
> +       usb: usb@...09000 {
> +                       compatible = "amlogic,meson-g12a-usb-ctrl";
> +                       reg = <0x0 0xffe09000 0x0 0xa0>;
> +                       interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
> +                       #address-cells = <2>;
> +                       #size-cells = <2>;
> +                       ranges;
> +
> +                       clocks = <&clkc CLKID_USB>;
> +                       clock-names = "usb";
> +                       resets = <&reset RESET_USB>;
> +                       reset-names = "usb";
> +
> +                       ports {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +
> +                               /* USB2 Port 0 */
> +                               usb20: port@0 {
> +                                       reg = <0>;
> +                                       phys = <&usb2_phy0>;
> +                               };
> +
> +                               /* USB2 Port 1 */
> +                               usb21: port@1 {
> +                                       reg = <1>;
> +                                       phys = <&usb2_phy1>;
> +                               };
> +
> +                               /* USB3 Port 0 */
> +                               usb3: port@4 {
> +                                       reg = <4>;
> +                                       phys = <&usb3_pcie_phy PHY_TYPE_USB3>;
> +                               };
> +                       };
> +
> +                       dwc2: usb@...00000 {
> +                               compatible = "amlogic,meson-g12a-usb", "snps,dwc2";
> +                               reg = <0x0 0xff400000 0x0 0x40000>;
> +                               interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
> +                               clocks = <&clkc CLKID_USB1_DDR_BRIDGE>;
> +                               clock-names = "ddr";
> +                               dr_mode = "peripheral";
> +                               g-rx-fifo-size = <192>;
> +                               g-np-tx-fifo-size = <128>;
> +                               g-tx-fifo-size = <128 128 16 16 16>;
> +                       };
you suggested (off-list) that the OTG capable PHY should be passed to
the dwc2 instance
I'm aware that this is an example - could you please still add it for
consistency?

> +
> +                       dwc3: dwc3@...00000 {
> +                               compatible = "snps,dwc3";
> +                               reg = <0x0 0xff500000 0x0 0x100000>;
> +                               interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
> +                               dr_mode = "host";
> +                               snps,dis_u2_susphy_quirk;
> +                               snps,quirk-frame-length-adjustment;
> +                       };
maybe the phys should also be passed to the dwc3 instance?


Regards
Martin