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Date: Sun, 16 Apr 2023 09:26:01 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: forbidden405@...look.com, Ulf Hansson <ulf.hansson@...aro.org>,
Jaehoon Chung <jh80.chung@...sung.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org
Subject: Re: [PATCH RFC 3/3] binding: mmc: hi3798cv200-dw-mshc: convert to
YAML and rename to histb-dw-mshc, add compatible of hi3798mv200
On 15/04/2023 16:18, Yang Xiwen via B4 Relay wrote:
> From: Yang Xiwen <forbidden405@...look.com>
>
> Hi3798MV200 has an extra clock, also document it here.
Use subject prefixes matching the subsystem (which you can get for
example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
your patch is touching).
Subject: it is way too long. It should be just conversion. Don't
introduce new compatibles.
>
> Signed-off-by: Yang Xiwen <forbidden405@...look.com>
> ---
> .../bindings/mmc/hi3798cv200-dw-mshc.txt | 40 ----------
> .../devicetree/bindings/mmc/histb-dw-mshc.yaml | 90 ++++++++++++++++++++++
> 2 files changed, 90 insertions(+), 40 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt
> deleted file mode 100644
> index a0693b7145f2a..0000000000000
> --- a/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt
> +++ /dev/null
> @@ -1,40 +0,0 @@
> -* Hisilicon Hi3798CV200 specific extensions to the Synopsys Designware Mobile
> - Storage Host Controller
> -
> -Read synopsys-dw-mshc.txt for more details
> -
> -The Synopsys designware mobile storage host controller is used to interface
> -a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
> -differences between the core Synopsys dw mshc controller properties described
> -by synopsys-dw-mshc.txt and the properties used by the Hisilicon Hi3798CV200
> -specific extensions to the Synopsys Designware Mobile Storage Host Controller.
> -
> -Required Properties:
> -- compatible: Should contain "hisilicon,hi3798cv200-dw-mshc".
> -- clocks: A list of phandle + clock-specifier pairs for the clocks listed
> - in clock-names.
> -- clock-names: Should contain the following:
> - "ciu" - The ciu clock described in synopsys-dw-mshc.txt.
> - "biu" - The biu clock described in synopsys-dw-mshc.txt.
> - "ciu-sample" - Hi3798CV200 extended phase clock for ciu sampling.
> - "ciu-drive" - Hi3798CV200 extended phase clock for ciu driving.
> -
> -Example:
> -
> - emmc: mmc@...0000 {
> - compatible = "hisilicon,hi3798cv200-dw-mshc";
> - reg = <0x9830000 0x10000>;
> - interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
> - clocks = <&crg HISTB_MMC_CIU_CLK>,
> - <&crg HISTB_MMC_BIU_CLK>,
> - <&crg HISTB_MMC_SAMPLE_CLK>,
> - <&crg HISTB_MMC_DRV_CLK>;
> - clock-names = "ciu", "biu", "ciu-sample", "ciu-drive";
> - fifo-depth = <256>;
> - clock-frequency = <200000000>;
> - cap-mmc-highspeed;
> - mmc-ddr-1_8v;
> - mmc-hs200-1_8v;
> - non-removable;
> - bus-width = <8>;
> - };
> diff --git a/Documentation/devicetree/bindings/mmc/histb-dw-mshc.yaml b/Documentation/devicetree/bindings/mmc/histb-dw-mshc.yaml
> new file mode 100644
> index 0000000000000..05a435185e9da
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/histb-dw-mshc.yaml
> @@ -0,0 +1,90 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mmc/histb-dw-mshc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title:
> + Hisilicon Hi3798CV200 specific extensions to the Synopsys Designware Mobile
> + Storage Host Controller
> +
> +maintainers:
> + - Yang Xiwen <forbidden405@...look.com>
> +
> +description:
> + The Synopsys designware mobile storage host controller is used to interface
> + a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
> + differences between the core Synopsys dw mshc controller properties described
> + by synopsys-dw-mshc.txt and the properties used by the Hisilicon Hi3798CV200
> + specific extensions to the Synopsys Designware Mobile Storage Host Controller.
Drop the last sentence.
> +
> +allOf:
> + - $ref: "synopsys-dw-mshc-common.yaml#"
Drop quotes.
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: hisilicon,hi3798mv200-dw-mshc
> + then:
> + properties:
> + clocks:
> + minItems: 5
> +
> + clock-names:
> + minItems: 5
Entire allOf goes after required:.
> +
> +properties:
> + compatible:
> + enum:
> + - hisilicon,hi3798cv200-dw-mshc
> + - hisilicon,hi3798mv200-dw-mshc
New compatibles are not related to conversion.
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + minItems: 4
> + maxItems: 5
> + description: A list of phandles for the clocks listed in clock-names
Drop description.
> +
> + clock-names:
> + minItems: 4
> + items:
> + - const: ciu
> + - const: biu
> + - const: ciu-sample
> + - const: ciu-drive
> + - const: sap-dll-mode
Only four clocks were in original document. Don't mix different changes
in one patch.
> +
> +unevaluatedProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> + - clock-names
> +
> +examples:
> + - |
> + emmc: mmc@...0000 {
> + compatible = "hisilicon,hi3798cv200-dw-mshc";
> + reg = <0x9830000 0x10000>;
Wrong indentation. Use 4 spaces for example indentation.
> + interrupts = <35>;
> + clocks = <&crg 1>,
> +
>
Best regards,
Krzysztof
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