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Date:   Sat, 31 Oct 2020 12:36:23 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Yong Wu <yong.wu@...iatek.com>,
        Honghui Zhang <honghui.zhang@...iatek.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        Will Deacon <will@...nel.org>, Tomasz Figa <tfiga@...gle.com>,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com,
        Nicolas Boichat <drinkcat@...omium.org>, anan.sun@...iatek.com,
        ming-fan.chen@...iatek.com, Fabien Parent <fparent@...libre.com>
Subject: Re: [PATCH v4 1/3] dt-bindings: memory: mediatek: Convert SMI to DT
 schema

On Fri, Oct 30, 2020 at 05:12:52PM +0800, Yong Wu wrote:
> Convert MediaTek SMI to DT schema.
> 
> CC: Fabien Parent <fparent@...libre.com>
> CC: Ming-Fan Chen <ming-fan.chen@...iatek.com>
> CC: Matthias Brugger <matthias.bgg@...il.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> ---
>  .../mediatek,smi-common.txt                   |  50 -------
>  .../mediatek,smi-common.yaml                  | 140 ++++++++++++++++++
>  .../memory-controllers/mediatek,smi-larb.txt  |  50 -------
>  .../memory-controllers/mediatek,smi-larb.yaml | 129 ++++++++++++++++
>  4 files changed, 269 insertions(+), 100 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt

+Cc Honghui Zhang,

Your Ack is needed as you contributed descriptions to the bindings and
work is being relicensed to GPL-2.0-only OR BSD-2-Clause.


Best regards,
Krzysztof




>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
>  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt
> deleted file mode 100644
> index dbafffe3f41e..000000000000
> --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt
> +++ /dev/null
> @@ -1,50 +0,0 @@
> -SMI (Smart Multimedia Interface) Common
> -
> -The hardware block diagram please check bindings/iommu/mediatek,iommu.txt
> -
> -Mediatek SMI have two generations of HW architecture, here is the list
> -which generation the SoCs use:
> -generation 1: mt2701 and mt7623.
> -generation 2: mt2712, mt6779, mt8167, mt8173 and mt8183.
> -
> -There's slight differences between the two SMI, for generation 2, the
> -register which control the iommu port is at each larb's register base. But
> -for generation 1, the register is at smi ao base(smi always on register
> -base). Besides that, the smi async clock should be prepared and enabled for
> -SMI generation 1 to transform the smi clock into emi clock domain, but that is
> -not needed for SMI generation 2.
> -
> -Required properties:
> -- compatible : must be one of :
> -	"mediatek,mt2701-smi-common"
> -	"mediatek,mt2712-smi-common"
> -	"mediatek,mt6779-smi-common"
> -	"mediatek,mt7623-smi-common", "mediatek,mt2701-smi-common"
> -	"mediatek,mt8167-smi-common"
> -	"mediatek,mt8173-smi-common"
> -	"mediatek,mt8183-smi-common"
> -- reg : the register and size of the SMI block.
> -- power-domains : a phandle to the power domain of this local arbiter.
> -- clocks : Must contain an entry for each entry in clock-names.
> -- clock-names : must contain 3 entries for generation 1 smi HW and 2 entries
> -  for generation 2 smi HW as follows:
> -  - "apb" : Advanced Peripheral Bus clock, It's the clock for setting
> -	    the register.
> -  - "smi" : It's the clock for transfer data and command.
> -	    They may be the same if both source clocks are the same.
> -  - "async" : asynchronous clock, it help transform the smi clock into the emi
> -	      clock domain, this clock is only needed by generation 1 smi HW.
> -  and these 2 option clocks for generation 2 smi HW:
> -  - "gals0": the path0 clock of GALS(Global Async Local Sync).
> -  - "gals1": the path1 clock of GALS(Global Async Local Sync).
> -  Here is the list which has this GALS: mt6779 and mt8183.
> -
> -Example:
> -	smi_common: smi@...22000 {
> -		compatible = "mediatek,mt8173-smi-common";
> -		reg = <0 0x14022000 0 0x1000>;
> -		power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
> -		clocks = <&mmsys CLK_MM_SMI_COMMON>,
> -			 <&mmsys CLK_MM_SMI_COMMON>;
> -		clock-names = "apb", "smi";
> -	};
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> new file mode 100644
> index 000000000000..e050a0c2aed6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> @@ -0,0 +1,140 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2020 MediaTek Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/memory-controllers/mediatek,smi-common.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SMI (Smart Multimedia Interface) Common
> +
> +maintainers:
> +  - Yong Wu <yong.wu@...iatek.com>
> +
> +description: |+
> +  The hardware block diagram please check bindings/iommu/mediatek,iommu.yaml
> +
> +  MediaTek SMI have two generations of HW architecture, here is the list
> +  which generation the SoCs use:
> +  generation 1: mt2701 and mt7623.
> +  generation 2: mt2712, mt6779, mt8167, mt8173 and mt8183.
> +
> +  There's slight differences between the two SMI, for generation 2, the
> +  register which control the iommu port is at each larb's register base. But
> +  for generation 1, the register is at smi ao base(smi always on register
> +  base). Besides that, the smi async clock should be prepared and enabled for
> +  SMI generation 1 to transform the smi clock into emi clock domain, but that is
> +  not needed for SMI generation 2.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - mediatek,mt2701-smi-common
> +          - mediatek,mt2712-smi-common
> +          - mediatek,mt6779-smi-common
> +          - mediatek,mt8167-smi-common
> +          - mediatek,mt8173-smi-common
> +          - mediatek,mt8183-smi-common
> +
> +      - description: for mt7623
> +        items:
> +          - const: mediatek,mt7623-smi-common
> +          - const: mediatek,mt2701-smi-common
> +
> +  reg:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  clocks:
> +    description: |
> +      apb and smi are mandatory. the async is only for generation 1 smi HW.
> +      gals(global async local sync) also is optional, see below.
> +    minItems: 2
> +    maxItems: 4
> +    items:
> +      - description: apb is Advanced Peripheral Bus clock, It's the clock for
> +          setting the register.
> +      - description: smi is the clock for transfer data and command.
> +      - description: async is asynchronous clock, it help transform the smi clock
> +          into the emi clock domain.
> +      - description: gals0 is the path0 clock of gals.
> +      - description: gals1 is the path1 clock of gals.
> +
> +  clock-names:
> +    minItems: 2
> +    maxItems: 4
> +
> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +  - clocks
> +  - clock-names
> +
> +allOf:
> +  - if: #only for gen1 HW
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt2701-smi-common
> +    then:
> +       properties:
> +         clock:
> +           items:
> +             minItems: 3
> +             maxItems: 3
> +         clock-names:
> +           items:
> +             - const: apb
> +             - const: smi
> +             - const: async
> +
> +  - if: #for gen2 HW that have gals
> +      properties:
> +        compatible:
> +            enum:
> +              - mediatek,mt6779-smi-common
> +              - mediatek,mt8183-smi-common
> +
> +    then:
> +      properties:
> +        clock:
> +          items:
> +            minItems: 4
> +            maxItems: 4
> +        clock-names:
> +          items:
> +            - const: apb
> +            - const: smi
> +            - const: gals0
> +            - const: gals1
> +
> +    else: #for gen2 HW that don't have gals
> +      properties:
> +        clock:
> +          items:
> +            minItems: 2
> +            maxItems: 2
> +        clock-names:
> +          items:
> +            - const: apb
> +            - const: smi
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8173-clk.h>
> +    #include <dt-bindings/power/mt8173-power.h>
> +
> +    smi_common: smi@...22000 {
> +            compatible = "mediatek,mt8173-smi-common";
> +            reg = <0x14022000 0x1000>;
> +            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
> +            clocks = <&mmsys CLK_MM_SMI_COMMON>,
> +                     <&mmsys CLK_MM_SMI_COMMON>;
> +            clock-names = "apb", "smi";
> +    };
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
> deleted file mode 100644
> index 0c5de12b5496..000000000000
> --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
> +++ /dev/null
> @@ -1,50 +0,0 @@
> -SMI (Smart Multimedia Interface) Local Arbiter
> -
> -The hardware block diagram please check bindings/iommu/mediatek,iommu.txt
> -
> -Required properties:
> -- compatible : must be one of :
> -		"mediatek,mt2701-smi-larb"
> -		"mediatek,mt2712-smi-larb"
> -		"mediatek,mt6779-smi-larb"
> -		"mediatek,mt7623-smi-larb", "mediatek,mt2701-smi-larb"
> -		"mediatek,mt8167-smi-larb"
> -		"mediatek,mt8173-smi-larb"
> -		"mediatek,mt8183-smi-larb"
> -- reg : the register and size of this local arbiter.
> -- mediatek,smi : a phandle to the smi_common node.
> -- power-domains : a phandle to the power domain of this local arbiter.
> -- clocks : Must contain an entry for each entry in clock-names.
> -- clock-names: must contain 2 entries, as follows:
> -  - "apb" : Advanced Peripheral Bus clock, It's the clock for setting
> -	    the register.
> -  - "smi" : It's the clock for transfer data and command.
> -  and this optional clock name:
> -  - "gals": the clock for GALS(Global Async Local Sync).
> -  Here is the list which has this GALS: mt8183.
> -
> -Required property for mt2701, mt2712, mt6779, mt7623 and mt8167:
> -- mediatek,larb-id :the hardware id of this larb.
> -
> -Example:
> -	larb1: larb@...10000 {
> -		compatible = "mediatek,mt8173-smi-larb";
> -		reg = <0 0x16010000 0 0x1000>;
> -		mediatek,smi = <&smi_common>;
> -		power-domains = <&scpsys MT8173_POWER_DOMAIN_VDEC>;
> -		clocks = <&vdecsys CLK_VDEC_CKEN>,
> -			 <&vdecsys CLK_VDEC_LARB_CKEN>;
> -		clock-names = "apb", "smi";
> -	};
> -
> -Example for mt2701:
> -	larb0: larb@...10000 {
> -		compatible = "mediatek,mt2701-smi-larb";
> -		reg = <0 0x14010000 0 0x1000>;
> -		mediatek,smi = <&smi_common>;
> -		mediatek,larb-id = <0>;
> -		clocks = <&mmsys CLK_MM_SMI_LARB0>,
> -			 <&mmsys CLK_MM_SMI_LARB0>;
> -		clock-names = "apb", "smi";
> -		power-domains = <&scpsys MT2701_POWER_DOMAIN_DISP>;
> -	};
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
> new file mode 100644
> index 000000000000..a11a105e872f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
> @@ -0,0 +1,129 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2020 MediaTek Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/memory-controllers/mediatek,smi-larb.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SMI (Smart Multimedia Interface) Local Arbiter
> +
> +maintainers:
> +  - Yong Wu <yong.wu@...iatek.com>
> +
> +description: |+
> +  The hardware block diagram please check bindings/iommu/mediatek,iommu.yaml
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - mediatek,mt2701-smi-larb
> +          - mediatek,mt2712-smi-larb
> +          - mediatek,mt6779-smi-larb
> +          - mediatek,mt8167-smi-larb
> +          - mediatek,mt8173-smi-larb
> +          - mediatek,mt8183-smi-larb
> +
> +      - description: for mt7623
> +        items:
> +          - const: mediatek,mt7623-smi-larb
> +          - const: mediatek,mt2701-smi-larb
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    description: |
> +      apb and smi are mandatory. gals(global async local sync) is optional.
> +    minItems: 2
> +    maxItems: 3
> +    items:
> +       - description: apb is Advanced Peripheral Bus clock, It's the clock for
> +           setting the register.
> +       - description: smi is the clock for transfer data and command.
> +       - description: the clock for gals.
> +
> +  clock-names:
> +    minItems: 2
> +    maxItems: 3
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  mediatek,smi:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: a phandle to the smi_common node.
> +
> +  mediatek,larb-id:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    minimum: 0
> +    maximum: 31
> +    description: the hardware id of this larb.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - power-domains
> +
> +allOf:
> +  - if: # HW has gals
> +      properties:
> +        compatible:
> +          enum:
> +            - mediatek,mt8183-smi-larb
> +
> +    then:
> +      properties:
> +        clock:
> +          items:
> +            minItems: 3
> +            maxItems: 3
> +        clock-names:
> +          items:
> +            - const: apb
> +            - const: smi
> +            - const: gals
> +
> +    else:
> +      properties:
> +        clock:
> +          items:
> +            minItems: 2
> +            maxItems: 2
> +        clock-names:
> +          items:
> +            - const: apb
> +            - const: smi
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt2701-smi-larb
> +              - mediatek,mt2712-smi-larb
> +              - mediatek,mt6779-smi-larb
> +              - mediatek,mt8167-smi-larb
> +
> +    then:
> +      required:
> +        - mediatek,larb-id
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8173-clk.h>
> +    #include <dt-bindings/power/mt8173-power.h>
> +
> +    larb1: larb@...10000 {
> +      compatible = "mediatek,mt8173-smi-larb";
> +      reg = <0x16010000 0x1000>;
> +      mediatek,smi = <&smi_common>;
> +      power-domains = <&scpsys MT8173_POWER_DOMAIN_VDEC>;
> +      clocks = <&vdecsys CLK_VDEC_CKEN>,
> +               <&vdecsys CLK_VDEC_LARB_CKEN>;
> +      clock-names = "apb", "smi";
> +    };
> -- 
> 2.18.0

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