On Wed, May 25, 2022 at 10:31:46AM +0900, Nobuhiro Iwamatsu wrote:
> Add documentation for the binding of Toshiba Visconti5 SoC's IOMMU.
>
> Signed-off-by: Nobuhiro Iwamatsu
> ---
> .../bindings/iommu/toshiba,visconti-atu.yaml | 62 +++
> 1 file changed, 62 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml
>
> diff --git
> a/Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml
> b/Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml
> new file mode 100644
> index ..af8d6688fa70
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml
> @@ -0,0 +1,62 @@
> +# SPDX-License-Identifier: GPL-2.0-only
Dual license: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iommu/toshiba,visconti-atu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Toshiba ARM SoC Visconti5 IOMMU (ATU)
> +
> +maintainers:
> + - Nobuhiro Iwamatsu
> +
> +description: |+
> + IOMMU (ATU) driver can bse used for Visconti5's multimedia IPs, such as
Bindings are for hardware, not drivers.
> + DCNN (Deep Convolutional Neural Network), VIIF(Video Input), VOIF(Video
> + output), and others.
> +
> +properties:
> + compatible:
> +const: toshiba,visconti-atu
> +
> + reg:
> +maxItems: 1
> +
> + "#iommu-cells":
> +const: 0
> +
> + toshiba,max-entry:
> +$ref: /schemas/types.yaml#/definitions/uint32
> +description: The size of entry for address
> +enum:
> + - 16
> + - 32
> +
> + toshiba,reserved-entry:
> +$ref: /schemas/types.yaml#/definitions/uint32
> +description: The reserve number of entry address.
> +default: 0
> +minimum: 0
> +maximum: 32
These 2 need a better description of what they are for.
> +
> +required:
> + - compatible
> + - reg
> + - "#iommu-cells"
> + - toshiba,max-entry
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> +soc {
> +#address-cells = <2>;
> +#size-cells = <2>;
> +
> +atu_affine0: iommu@1400f000 {
Drop unused labels.
> +compatible = "toshiba,visconti-atu";
> +reg = <0 0x1400F000 0 0x1000>;
> +toshiba,max-entry = <16>;
> +toshiba,reserved-entry = <1>;
> +#iommu-cells = <0>;
> +};
> +};
> --
> 2.36.0
>
>
>
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