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 <nobuhiro1.iwamatsu@xxxxxxxxxxxxx> > --- > .../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 000000000000..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 <nobuhiro1.iwamatsu@xxxxxxxxxxxxx> > + > +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 > > >
