linux-kernel - RE: [PATCH v1 1/2] scsi: dt-bindings: ufs: Add vcc-voltage-level for UFS

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Date:   Sun, 13 Sep 2020 09:35:43 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     "Bao D. Nguyen" <nguyenb@...eaurora.org>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
CC:     "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v1 1/2] scsi: dt-bindings: ufs: Add vcc-voltage-level for
 UFS



> 
> 
> UFS's specifications supports a range of Vcc operating
> voltage levels. Add documentation for the UFS's Vcc voltage
> levels setting.
> 
> Signed-off-by: Can Guo <cang@...eaurora.org>
> Signed-off-by: Asutosh Das <asutoshd@...eaurora.org>
> Signed-off-by: Bao D. Nguyen <nguyenb@...eaurora.org>
> ---
>  Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> index 415ccdd..7257b32 100644
> --- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> +++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
> @@ -23,6 +23,8 @@ Optional properties:
>                            with "phys" attribute, provides phandle to UFS PHY node
>  - vdd-hba-supply        : phandle to UFS host controller supply regulator node
>  - vcc-supply            : phandle to VCC supply regulator node
> +- vcc-voltage-level     : specifies voltage levels for VCC supply.
For ufs3.1+ devices

> +                          Should be specified in pairs (min, max), units uV.
>  - vccq-supply           : phandle to VCCQ supply regulator node
>  - vccq2-supply          : phandle to VCCQ2 supply regulator node
>  - vcc-supply-1p8        : For embedded UFS devices, valid VCC range is 1.7-1.95V
> --
Why are you removing all other docs?
They are still relevant for non ufs3.1 devices.