linux-kernel - Re: [PATCH V3 2/6] dt-bindings: PCI: tegra: Add PCIe slot supplies regulator entries

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Date:   Mon, 2 Sep 2019 11:41:08 +0100
From:   Andrew Murray <andrew.murray@....com>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     lorenzo.pieralisi@....com, bhelgaas@...gle.com, robh+dt@...nel.org,
        thierry.reding@...il.com, jonathanh@...dia.com, kishon@...com,
        gustavo.pimentel@...opsys.com, digetx@...il.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 V3 2/6] dt-bindings: PCI: tegra: Add PCIe slot supplies
 regulator entries

On Wed, Aug 28, 2019 at 10:58:46PM +0530, Vidya Sagar wrote:
> Add optional bindings "vpcie3v3-supply" and "vpcie12v-supply" to describe
> regulators of a PCIe slot's supplies 3.3V and 12V provided the platform
> is designed to have regulator controlled slot supplies.
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>

Reviewed-by: Andrew Murray <andrew.murray@....com>

> ---
> V3:
> * None
> 
> V2:
> * None
> 
>  .../devicetree/bindings/pci/nvidia,tegra194-pcie.txt      | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
> index 0ac1b867ac24..b739f92da58e 100644
> --- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
> +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
> @@ -104,6 +104,12 @@ Optional properties:
>     specified in microseconds
>  - nvidia,aspm-l0s-entrance-latency-us: ASPM L0s entrance latency to be
>     specified in microseconds
> +- vpcie3v3-supply: A phandle to the regulator node that supplies 3.3V to the slot
> +  if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
> +  in p2972-0000 platform).
> +- vpcie12v-supply: A phandle to the regulator node that supplies 12V to the slot
> +  if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
> +  in p2972-0000 platform).
>  
>  Examples:
>  =========
> @@ -156,6 +162,8 @@ Tegra194:
>  			  0xc2000000 0x18 0x00000000 0x18 0x00000000 0x4 0x00000000>;  /* prefetchable memory (16GB) */
>  
>  		vddio-pex-ctl-supply = <&vdd_1v8ao>;
> +		vpcie3v3-supply = <&vdd_3v3_pcie>;
> +		vpcie12v-supply = <&vdd_12v_pcie>;
>  
>  		phys = <&p2u_hsio_2>, <&p2u_hsio_3>, <&p2u_hsio_4>,
>  		       <&p2u_hsio_5>;
> -- 
> 2.17.1
>