linux-kernel - Re: [PATCH v4 23/42] dt-bindings: dma: Add Cirrus EP93xx

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Message-ID: <78167fd2-b4a0-6081-b994-101bbc8facc2@linaro.org>
Date:   Fri, 15 Sep 2023 12:58:58 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     nikita.shubin@...uefel.me, Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>
Cc:     dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v4 23/42] dt-bindings: dma: Add Cirrus EP93xx

On 15/09/2023 10:11, Nikita Shubin via B4 Relay wrote:
> From: Nikita Shubin <nikita.shubin@...uefel.me>
> 
> Add YAML bindings for ep93xx SoC DMA.
> 
> Signed-off-by: Nikita Shubin <nikita.shubin@...uefel.me>
> ---
>  .../bindings/dma/cirrus,ep9301-dma-m2m.yaml        |  69 ++++++++++++
>  .../bindings/dma/cirrus,ep9301-dma-m2p.yaml        | 121 +++++++++++++++++++++
>  include/dt-bindings/dma/cirrus,ep93xx-dma.h        |  26 +++++
>  include/linux/platform_data/dma-ep93xx.h           |  21 +---
>  4 files changed, 217 insertions(+), 20 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/dma/cirrus,ep9301-dma-m2m.yaml b/Documentation/devicetree/bindings/dma/cirrus,ep9301-dma-m2m.yaml
> new file mode 100644
> index 000000000000..80a4352bf8aa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/cirrus,ep9301-dma-m2m.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/cirrus,ep9301-dma-m2m.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cirrus Logick ep93xx SoC DMA controller
> +
> +maintainers:
> +  - Alexander Sverdlin <alexander.sverdlin@...il.com>
> +  - Nikita Shubin <nikita.shubin@...uefel.me>
> +

Missing $ref to dma-controller.yaml

> +properties:
> +  compatible:
> +    oneOf:
> +      - const: cirrus,ep9301-dma-m2m
> +      - items:
> +          - enum:
> +              - cirrus,ep9302-dma-m2m
> +              - cirrus,ep9307-dma-m2m
> +              - cirrus,ep9312-dma-m2m
> +              - cirrus,ep9315-dma-m2m
> +          - const: cirrus,ep9301-dma-m2m
> +
> +  reg:
> +    items:
> +      - description: m2m0 channel registers
> +      - description: m2m1 channel registers
> +
> +  clocks:
> +    items:
> +      - description: m2m0 channel gate clock
> +      - description: m2m1 channel gate clock
> +
> +  clock-names:
> +    items:
> +      - const: m2m0
> +      - const: m2m1
> +
> +  interrupts:
> +    items:
> +      - description: m2m0 channel interrupt
> +      - description: m2m1 channel interrupt
> +
> +  '#dma-cells': true

Rather:
const: 1

> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/cirrus,ep9301-clk.h>
> +    dma-controller@...00100 {
> +        compatible = "cirrus,ep9301-dma-m2m";
> +        reg = <0x80000100 0x0040>,
> +              <0x80000140 0x0040>;
> +        clocks = <&eclk EP93XX_CLK_M2M0>,
> +                 <&eclk EP93XX_CLK_M2M1>;
> +        clock-names = "m2m0", "m2m1";
> +        interrupt-parent = <&vic0>;
> +        interrupts = <17>, <18>;
> +        #dma-cells = <1>;
> +    };
> diff --git a/Documentation/devicetree/bindings/dma/cirrus,ep9301-dma-m2p.yaml b/Documentation/devicetree/bindings/dma/cirrus,ep9301-dma-m2p.yaml
> new file mode 100644
> index 000000000000..0236cc37233e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/cirrus,ep9301-dma-m2p.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/cirrus,ep9301-dma-m2p.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cirrus Logick ep93xx SoC M2P DMA controller
> +
> +maintainers:
> +  - Alexander Sverdlin <alexander.sverdlin@...il.com>
> +  - Nikita Shubin <nikita.shubin@...uefel.me>
> +

Same comments in this file

> +properties:
> +  compatible:
> +    oneOf:
> +      - const: cirrus,ep9301-dma-m2p
> +      - items:
> +          - enum:
> +              - cirrus,ep9302-dma-m2p
> +              - cirrus,ep9307-dma-m2p
> +              - cirrus,ep9312-dma-m2p
> +              - cirrus,ep9315-dma-m2p
> +          - const: cirrus,ep9301-dma-m2p
> +
> +  reg:
> +    items:
> +      - description: m2p0 channel registers
> +      - description: m2p1 channel registers
> +      - description: m2p2 channel registers
> +      - description: m2p3 channel registers
> +      - description: m2p4 channel registers
> +      - description: m2p5 channel registers
> +      - description: m2p6 channel registers
> +      - description: m2p7 channel registers
> +      - description: m2p8 channel registers
> +      - description: m2p9 channel registers
> +

...

> diff --git a/include/dt-bindings/dma/cirrus,ep93xx-dma.h b/include/dt-bindings/dma/cirrus,ep93xx-dma.h
> new file mode 100644
> index 000000000000..21c7324eb27e
> --- /dev/null
> +++ b/include/dt-bindings/dma/cirrus,ep93xx-dma.h

Use same filename as bindings.

> @@ -0,0 +1,26 @@
> +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
> +#ifndef DT_BINDINGS_CIRRUS_EP93XX_DMA_H
> +#define DT_BINDINGS_CIRRUS_EP93XX_DMA_H
> +
> +/*
> + * M2P channels.
> + *
> + * Note that these values are also directly used for setting the PPALLOC
> + * register.
> + */
> +#define EP93XX_DMA_I2S1         0

Where is the user of these defines? IOW, who uses them? Only driver?


> +#define EP93XX_DMA_I2S2         1
> +#define EP93XX_DMA_AAC1         2
> +#define EP93XX_DMA_AAC2         3
> +#define EP93XX_DMA_AAC3         4
> +#define EP93XX_DMA_I2S3         5
> +#define EP93XX_DMA_UART1        6
> +#define EP93XX_DMA_UART2        7
> +#define EP93XX_DMA_UART3        8
> +#define EP93XX_DMA_IRDA         9
> +/* M2M channels */
> +#define EP93XX_DMA_SSP          10
> +#define EP93XX_DMA_IDE          11
> +
> +#endif /* DT_BINDINGS_CIRRUS_EP93XX_DMA_H */
> +
> diff --git a/include/linux/platform_data/dma-ep93xx.h b/include/linux/platform_data/dma-ep93xx.h> index eb9805bb3fe8..54b41d1468ef 100644
> --- a/include/linux/platform_data/dma-ep93xx.h
> +++ b/include/linux/platform_data/dma-ep93xx.h
> @@ -5,26 +5,7 @@
>  #include <linux/types.h>
>  #include <linux/dmaengine.h>
>  #include <linux/dma-mapping.h>
> -
> -/*
> - * M2P channels.
> - *
> - * Note that these values are also directly used for setting the PPALLOC
> - * register.
> - */
> -#define EP93XX_DMA_I2S1		0
> -#define EP93XX_DMA_I2S2		1
> -#define EP93XX_DMA_AAC1		2
> -#define EP93XX_DMA_AAC2		3
> -#define EP93XX_DMA_AAC3		4
> -#define EP93XX_DMA_I2S3		5
> -#define EP93XX_DMA_UART1	6
> -#define EP93XX_DMA_UART2	7
> -#define EP93XX_DMA_UART3	8
> -#define EP93XX_DMA_IRDA		9
> -/* M2M channels */
> -#define EP93XX_DMA_SSP		10
> -#define EP93XX_DMA_IDE		11
> +#include <dt-bindings/dma/cirrus,ep93xx-dma.h>

Your headers should not include bindings.


Best regards,
Krzysztof