From: Rob Herring <robh@kernel.org>
To: JC Kuo <jckuo@nvidia.com>
Cc: gregkh@linuxfoundation.org, thierry.reding@gmail.com,
robh@kernel.org, jonathanh@nvidia.com, kishon@ti.com,
linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
nkristam@nvidia.com, JC Kuo <jckuo@nvidia.com>
Subject: Re: [PATCH v6 3/5] dt-bindings: phy: tegra: Add Tegra194 support
Date: Tue, 18 Feb 2020 14:47:16 -0600 [thread overview]
Message-ID: <20200218204716.GA9575@bogus> (raw)
In-Reply-To: <20200212061133.11665-4-jckuo@nvidia.com>
On Wed, 12 Feb 2020 14:11:31 +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
> XUSB pad controller (DVDD_PEX, DVDD_PEX_PLL, HVDD_PEX and HVDD_PEX_PLL)
> , 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 <jckuo@nvidia.com>
> ---
> 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: Rob Herring <robh@kernel.org>
next prev parent reply other threads:[~2020-02-18 20:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 6:11 [PATCH v6 0/5] add Tegra194 XUSB host and pad controller support JC Kuo
2020-02-12 6:11 ` [PATCH v6 1/5] phy: tegra: xusb: Protect Tegra186 soc with config JC Kuo
2020-02-12 6:11 ` [PATCH v6 2/5] phy: tegra: xusb: Add Tegra194 support JC Kuo
2020-02-17 8:28 ` Thierry Reding
2020-02-12 6:11 ` [PATCH v6 3/5] dt-bindings: phy: tegra: " JC Kuo
2020-02-17 8:29 ` Thierry Reding
2020-02-18 20:47 ` Rob Herring [this message]
2020-02-12 6:11 ` [PATCH v6 4/5] arm64: tegra: Add XUSB and pad controller on Tegra194 JC Kuo
2020-02-17 8:31 ` Thierry Reding
2020-02-12 6:11 ` [PATCH v6 5/5] arm64: tegra: Enable XUSB host in P2972-0000 board JC Kuo
2020-02-17 8:33 ` Thierry Reding
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