linux-kernel - Re: [PATCH 12/16] dt-bindings: media: Add DT bindings for TI CSI2RX driver

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Message-ID: <20210401155201.GA488101@robh.at.kernel.org>
Date:   Thu, 1 Apr 2021 10:52:01 -0500
From:   Rob Herring <robh@...nel.org>
To:     Pratyush Yadav <p.yadav@...com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Benoit Parrot <bparrot@...com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Alexandre Courbot <acourbot@...omium.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Helen Koike <helen.koike@...labora.com>,
        Michael Tretter <m.tretter@...gutronix.de>,
        Peter Chen <peter.chen@....com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
        dmaengine@...r.kernel.org, Vignesh Raghavendra <vigneshr@...com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: Re: [PATCH 12/16] dt-bindings: media: Add DT bindings for TI CSI2RX
 driver

On Tue, Mar 30, 2021 at 11:03:44PM +0530, Pratyush Yadav wrote:
> TI's J721E uses the Cadence CSI2RX and DPHY peripherals to facilitate
> capture over a CSI-2 bus. The TI CSI2RX platform driver glues all the
> parts together.
> 
> Signed-off-by: Pratyush Yadav <p.yadav@...com>
> ---
>  .../devicetree/bindings/media/ti,csi2rx.yaml  | 70 +++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/ti,csi2rx.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/ti,csi2rx.yaml b/Documentation/devicetree/bindings/media/ti,csi2rx.yaml
> new file mode 100644
> index 000000000000..ebd894364391
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/ti,csi2rx.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/ti,csi2rx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI CSI2RX Wrapper Device Tree Bindings
> +
> +maintainers:
> +  - Pratyush Yadav <p.yadav@...com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: ti,csi2rx
> +
> +  dmas:
> +    description: RX DMA Channel 0

items:
  - description: RX DMA Channel 0

Or just 'maxItems: 1'

> +
> +  dma-names:
> +    items:
> +      - const: rx0
> +
> +  reg:
> +    maxItems: 1
> +    description: Base address and size of the TI wrapper registers.

That's all 'reg' properties, drop 'description'.

> +
> +  power-domains:
> +    maxItems: 1
> +    description:
> +      PM domain provider node and an args specifier containing
> +      the device id value.

Drop.

> +
> +  ranges: true
> +
> +  "#address-cells":
> +    const: 2
> +
> +  "#size-cells":
> +    const: 2
> +
> +patternProperties:
> +  "csi-bridge@":

"^csi-bridge@"

> +    type: object
> +    description: CSI2 bridge node.

Just an empty node?

> +
> +required:
> +  - compatible
> +  - reg
> +  - dmas
> +  - dma-names
> +  - power-domains
> +  - "#address-cells"
> +  - "#size-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +
> +    ti_csi2rx0: ticsi2rx {
> +        compatible = "ti,csi2rx";
> +        dmas = <&main_udmap 0x4940>;
> +        dma-names = "rx0";
> +        reg = <0x0 0x4500000 0x0 0x1000>;
> +        power-domains = <&k3_pds 26 TI_SCI_PD_EXCLUSIVE>;
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +    };
> -- 
> 2.30.0
>