linux-kernel - Re: [PATCH V5 11/16] dt-bindings: PHY: P2U: Add Tegra 194 P2U block

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Message-ID: <20190426154519.GA19329@bogus>
Date:   Fri, 26 Apr 2019 10:45:19 -0500
From:   Rob Herring <robh@...nel.org>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     lorenzo.pieralisi@....com, bhelgaas@...gle.com,
        mark.rutland@....com, thierry.reding@...il.com,
        jonathanh@...dia.com, kishon@...com, catalin.marinas@....com,
        will.deacon@....com, jingoohan1@...il.com,
        gustavo.pimentel@...opsys.com, mperttunen@...dia.com,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kthota@...dia.com,
        mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V5 11/16] dt-bindings: PHY: P2U: Add Tegra 194 P2U block

On Wed, Apr 24, 2019 at 10:49:59AM +0530, Vidya Sagar wrote:
> Add support for Tegra194 P2U (PIPE to UPHY) module block which is a glue
> module instantiated one for each PCIe lane between Synopsys Designware core
> based PCIe IP and Universal PHY block.

Missing Sob.

> ---
> Changes since [v4]:
> * None
> 
> Changes since [v3]:
> * None
> 
> Changes since [v2]:
> * Changed node label to reflect new format that includes either 'hsio' or
>   'nvhs' in its name to reflect which UPHY brick they belong to
> 
> Changes since [v1]:
> * This is a new patch in v2 series
> 
>  .../bindings/phy/phy-tegra194-p2u.txt         | 28 +++++++++++++++++++
>  1 file changed, 28 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
> 
> diff --git a/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
> new file mode 100644
> index 000000000000..8b543cba483b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
> @@ -0,0 +1,28 @@
> +NVIDIA Tegra194 P2U binding
> +
> +Tegra194 has two PHY bricks namely HSIO (High Speed IO) and NVHS (NVIDIA High
> +Speed) each interfacing with 12 and 8 P2U instances respectively.
> +A P2U instance is a glue logic between Synopsys DesignWare Core PCIe IP's PIPE
> +interface and PHY of HSIO/NVHS bricks. Each P2U instance represents one PCIe
> +lane.
> +
> +Required properties:
> +- compatible: For Tegra19x, must contain "nvidia,tegra194-p2u".
> +- reg: Should be the physical address space and length of respective each P2U
> +       instance.
> +- reg-names: Must include the entry "ctl".

-names is pointless when there is only 1.

> +
> +Required properties for PHY port node:
> +- #phy-cells: Defined by generic PHY bindings.  Must be 0.
> +
> +Refer to phy/phy-bindings.txt for the generic PHY binding properties.
> +
> +Example:
> +
> +p2u_hsio_0: p2u@...0000 {

phy@...

> +	compatible = "nvidia,tegra194-p2u";
> +	reg = <0x03e10000 0x10000>;
> +	reg-names = "ctl";
> +
> +	#phy-cells = <0>;
> +};
> -- 
> 2.17.1
>