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Date:   Mon, 17 Feb 2020 09:29:41 +0100
From:   Thierry Reding <>
To:     JC Kuo <>
Subject: Re: [PATCH v6 3/5] dt-bindings: phy: tegra: Add Tegra194 support

On Wed, Feb 12, 2020 at 02:11:31PM +0800, JC Kuo wrote:
> Extend the bindings to cover the set of features found in Tegra194.
> Note that, technically, there are four more supplies connected to the
> , but the power sequencing requirements of Tegra194 require these to be
> under the control of the PMIC.
> Tegra194 XUSB PADCTL supports up to USB 3.1 Gen 2 speed, however, it
> is possible for some platforms have long signal trace that could not
> provide sufficient electrical environment for Gen 2 speed. This patch
> adds a "maximum-speed" property to usb3 ports which can be used to
> specify the maximum supported speed for any particular USB 3.1 port.
> For a port that is not capable of SuperSpeedPlus, "maximum-speed"
> property should carry "super-speed".
> Signed-off-by: JC Kuo <>
> ---
> Changes in v6: none
> Changes in v5:
> - re-use "maximum-speed" instead of adding "nvidia,disable-gen2"
> Changes in v4: none
> Changes in v3: none
> Changes in v2:
> - fix a typo
>  .../phy/nvidia,tegra124-xusb-padctl.txt        | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)

Acked-by: Thierry Reding <>

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