linux-kernel - Re: [PATCH 5/5] arm64: dts: meson-axg-s400: enable USB OTG

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Date:   Tue, 15 Sep 2020 22:05:34 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 5/5] arm64: dts: meson-axg-s400: enable USB OTG

Hi Neil,

On Wed, Sep 9, 2020 at 6:05 PM Neil Armstrong <narmstrong@...libre.com> wrote:
[...]
> +&usb {
> +       status = "okay";
> +       dr_mode = "otg";
> +       vbus-supply = <&usb_pwr>;
> +};
> +
> +&usb2_phy1 {
> +       phy-supply = <&vcc_5v>;
out of curiosity: why do we need this phy-supply here?
isn't the usb_pwr regulator as vbus-supply above enough?


Best regards,
Martin