linux-kernel - Re: [RFC PATCH 3/8] dt-bindings: ufs: cdns,ufshc: convert to dtschema

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Message-ID: <d47a91e6-228a-38ea-fd55-8a3a61d1f63e@canonical.com>
Date:   Sun, 20 Feb 2022 18:06:40 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Wei Xu <xuwei5@...ilicon.com>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Chanho Park <chanho61.park@...sung.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Jan Kotas <jank@...ence.com>, linux-scsi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [RFC PATCH 3/8] dt-bindings: ufs: cdns,ufshc: convert to dtschema

On 19/02/2022 19:42, Krzysztof Kozlowski wrote:
> Convert the Cadence Universal Flash Storage (UFS) Controlle to DT schema
> format.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> ---
>  .../devicetree/bindings/ufs/cdns,ufshc.txt    | 32 -----------
>  .../devicetree/bindings/ufs/cdns,ufshc.yaml   | 56 +++++++++++++++++++
>  2 files changed, 56 insertions(+), 32 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/ufs/cdns,ufshc.txt
>  create mode 100644 Documentation/devicetree/bindings/ufs/cdns,ufshc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/ufs/cdns,ufshc.txt b/Documentation/devicetree/bindings/ufs/cdns,ufshc.txt
> deleted file mode 100644
> index 02347b017abd..000000000000
> --- a/Documentation/devicetree/bindings/ufs/cdns,ufshc.txt
> +++ /dev/null
> @@ -1,32 +0,0 @@
> -* Cadence Universal Flash Storage (UFS) Controller
> -
> -UFS nodes are defined to describe on-chip UFS host controllers.
> -Each UFS controller instance should have its own node.
> -Please see the ufshcd-pltfrm.txt for a list of all available properties.
> -
> -Required properties:
> -- compatible	: Compatible list, contains one of the following controllers:
> -			"cdns,ufshc" - Generic CDNS HCI,
> -			"cdns,ufshc-m31-16nm" - CDNS UFS HC + M31 16nm PHY
> -		  complemented with the JEDEC version:
> -			"jedec,ufs-2.0"
> -
> -- reg		: Address and length of the UFS register set.
> -- interrupts	: One interrupt mapping.
> -- freq-table-hz	: Clock frequency table.
> -		  See the ufshcd-pltfrm.txt for details.
> -- clocks	: List of phandle and clock specifier pairs.
> -- clock-names	: List of clock input name strings sorted in the same
> -		  order as the clocks property. "core_clk" is mandatory.
> -		  Depending on a type of a PHY,
> -		  the "phy_clk" clock can also be added, if needed.
> -
> -Example:
> -	ufs@...30000 {
> -		compatible = "cdns,ufshc", "jedec,ufs-2.0";
> -		reg = <0xfd030000 0x10000>;
> -		interrupts = <0 1 IRQ_TYPE_LEVEL_HIGH>;
> -		freq-table-hz = <0 0>, <0 0>;
> -		clocks = <&ufs_core_clk>, <&ufs_phy_clk>;
> -		clock-names = "core_clk", "phy_clk";
> -	};
> diff --git a/Documentation/devicetree/bindings/ufs/cdns,ufshc.yaml b/Documentation/devicetree/bindings/ufs/cdns,ufshc.yaml
> new file mode 100644
> index 000000000000..68ae5663cd25
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ufs/cdns,ufshc.yaml
> @@ -0,0 +1,56 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/ufs/cdns,ufshc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cadence Universal Flash Storage (UFS) Controller
> +
> +maintainers:
> +  - Jan Kotas <jank@...ence.com>
> +

This will require a "select:" to avoid clash with qcom (and maybe other)
schemas.

Best regards,
Krzysztof