linux-kernel - Re: [PATCH v5 1/3] media: dt-bindings: media: Document Rockchip VIP bindings

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Date:   Mon, 11 Jan 2021 15:26:49 -0600
From:   Rob Herring <robh@...nel.org>
To:     Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Heiko Stuebner <heiko@...ech.de>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: Re: [PATCH v5 1/3] media: dt-bindings: media: Document Rockchip VIP
 bindings

On Tue, Dec 29, 2020 at 05:17:22PM +0100, Maxime Chevallier wrote:
> Add a documentation for the Rockchip Camera Interface controller
> binding.
> 
> This controller can be found on platforms such as the PX30 or the
> RK3288, the PX30 being the only platform supported so far.
> 
> Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
> ---
> v3: Renamed the controller to "vip"
> 
> v4: fixed the binding to get a compiling example
> 
> v5: Fixed the binding even more, the 'endpoint' description was missing
> 
>  .../bindings/media/rockchip-vip.yaml          | 101 ++++++++++++++++++
>  1 file changed, 101 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/rockchip-vip.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/rockchip-vip.yaml b/Documentation/devicetree/bindings/media/rockchip-vip.yaml
> new file mode 100644
> index 000000000000..93055273b32f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/rockchip-vip.yaml
> @@ -0,0 +1,101 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/rockchip-vip.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Rockchip VIP Camera Interface
> +
> +maintainers:
> +  - Maxime Chevallier <maxime.chevallier@...tlin.com>
> +
> +description: |-
> +  Camera Interface for Rockchip platforms
> +
> +properties:
> +  compatible:
> +    const: rockchip,px30-vip
> +
> +  reg:
> +    maxItems: 2

Need to define what each 'reg' entry represents.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: ACLK
> +      - description: HCLK
> +      - description: PCLK IN
> +
> +  clock-names:
> +    items:
> +      - const: aclk
> +      - const: hclk
> +      - const: pclkin
> +
> +  resets:
> +    items:
> +      - description: AXI
> +      - description: AHB
> +      - description: PCLK IN
> +
> +  reset-names:
> +    items:
> +      - const: axi
> +      - const: ahb
> +      - const: pclkin
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  # See ./video-interfaces.txt for details
> +  port:
> +    type: object
> +    additionalProperties: false
> +    description: A connection to a sensor or decoder
> +
> +    properties:
> +      endpoint:
> +        type: object
> +
> +        properties:
> +          remote-endpoint: true
> +
> +        required:
> +          - remote-endpoint
> +
> +    required:
> +      - endpoint

You can drop everything for 'endpoint'. Just need 'port'.

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - port
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/px30-cru.h>
> +    #include <dt-bindings/power/px30-power.h>
> +
> +    vip: vip@...90000 {
> +        compatible = "rockchip,px30-vip";
> +        reg = <0x0 0xff490000>, <0x0 0x200>;
> +        interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&cru ACLK_CIF>, <&cru HCLK_CIF>, <&cru PCLK_CIF>;
> +        clock-names = "aclk", "hclk", "pclkin";
> +        resets = <&cru SRST_CIF_A>, <&cru SRST_CIF_H>, <&cru SRST_CIF_PCLKIN>;
> +        reset-names = "axi", "ahb", "pclkin";
> +        power-domains = <&power PX30_PD_VI>;
> +        port {
> +            vip_in: endpoint {
> +                remote-endpoint = <&tw9900_out>;
> +            };
> +        };
> +    };
> +...
> -- 
> 2.25.4
>