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SubjectRe: [PATCH 4/6] dt-bindings: phy: tegra: Add Tegra194 support
On Wed, Oct 02, 2019 at 04:00:49PM +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. To deal with
> this, a new device node property "nvidia,disable-gen2" was added to
> Tegra194 that be used to specifically disable Gen 2 speed for a
> particular USB 3.0 port so that the port can be limited to Gen 1 speed
> and avoid the instability.
>
> Signed-off-by: JC Kuo <jckuo@nvidia.com>
> ---
> .../bindings/phy/nvidia,tegra124-xusb-padctl.txt | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/phy/nvidia,tegra124-xusb-padctl.txt b/Documentation/devicetree/bindings/phy/nvidia,tegra124-xusb-padctl.txt
> index 9fb682e47c29..3bef37e7c365 100644
> --- a/Documentation/devicetree/bindings/phy/nvidia,tegra124-xusb-padctl.txt
> +++ b/Documentation/devicetree/bindings/phy/nvidia,tegra124-xusb-padctl.txt
> @@ -37,6 +37,7 @@ Required properties:
> - Tegra132: "nvidia,tegra132-xusb-padctl", "nvidia,tegra124-xusb-padctl"
> - Tegra210: "nvidia,tegra210-xusb-padctl"
> - Tegra186: "nvidia,tegra186-xusb-padctl"
> + - Tegra194: "nvidia,tegra194-xusb-padctl"
> - reg: Physical base address and length of the controller's registers.
> - resets: Must contain an entry for each entry in reset-names.
> - reset-names: Must include the following entries:
> @@ -62,6 +63,10 @@ For Tegra186:
> - vclamp-usb-supply: Bias rail for USB pad. Must supply 1.8 V.
> - vddio-hsic-supply: HSIC PHY power supply. Must supply 1.2 V.
>
> +For Tegra194:
> +- avdd-usb-supply: USB I/Os, VBUS, ID, REXT, D+/D- power supply. Must supply
> + 3.3 V.
> +- vclamp-usb-supply: Bias rail for USB pad. Must supply 1.8 V.
>
> Pad nodes:
> ==========
> @@ -154,6 +159,11 @@ For Tegra210, the list of valid PHY nodes is given below:
> - sata: sata-0
> - functions: "usb3-ss", "sata"
>
> +For Tegra194, the list of valid PHY nodes is given below:
> +- usb2: usb2-0, usb2-1, usb2-2, usb2-3
> + - functions: "xusb"
> +- usb3: usb3-0, usb3-1, usb3-2, usb3-3
> + - functions: "xusb"
>
> Port nodes:
> ===========
> @@ -221,6 +231,9 @@ Optional properties:
> is internal. In the absence of this property the port is considered to be
> external.
>
> +- nvidia,disable-gen2: A boolean property whose presence determines that a port
> + should be limited to USB 3.1 Gen 1. This properlty is only for Tegra194.

s/properlty/property/

With that:

Acked-by: Thierry Reding <treding@nvidia.com>
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