Hey, On Tue, Jul 14, 2026 at 12:11:43PM +0200, Leander Kieweg wrote: > Add Device Tree binding documentation for GlandaGPU, a custom > FPGA-based 2D display controller. > > Signed-off-by: Leander Kieweg <[email protected]> > --- > .../bindings/display/glanda,gpu.yaml | 49 +++++++++++++++++++ > .../devicetree/bindings/vendor-prefixes.yaml | 2 + > 2 files changed, 51 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/glanda,gpu.yaml > > diff --git a/Documentation/devicetree/bindings/display/glanda,gpu.yaml > b/Documentation/devicetree/bindings/display/glanda,gpu.yaml > new file mode 100644 > index 000000000..40304e773 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/glanda,gpu.yaml > @@ -0,0 +1,49 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/display/glanda,gpu.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: GlandaGPU 2D Hardware Accelerated Display Controller > + > +maintainers: > + - Leander Kieweg <[email protected]> > + > +description: | > + GlandaGPU is a custom FPGA soft-IP core providing a simple
Sadly googling this device only shows up Phoronix and other copy-paste
reporting sites. I think it'd probably be good to include a link to your
project either here or in the commit message.
> + 2D hardware-accelerated drawing engine (clear/rect/line) with a
> + VGA-compatible display output. The register window covers a
> + combined VRAM + MMIO region, with MMIO registers at a fixed
> + offset within it.
> +
> +properties:
> + compatible:
> + const: glanda,gpu-1.0
> +
> + reg:
> + maxItems: 1
> + description:
> + Combined VRAM + MMIO register window (VRAM at offset 0,
> + MMIO registers at offset 0x00200000 within this range).
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> + description: Bus and pixel clock provided to the FPGA IP.
This clock sounds like it is actually required? Doubt the device works
without it!
pw-bot: changes-requested
> +
> +required:
> + - compatible
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + gpu@c0000000 {
> + compatible = "glanda,gpu-1.0";
> + reg = <0xc0000000 0x1000000>;
> + interrupts = <0 43 4>;
Usually I would say do not include things if you don't have to, but I
would much rather you did if the alternative is an interrupts property
like this that doesn't resemble anything used in devicetrees.
> + clocks = <&osc1>;
> + };
> \ No newline at end of file
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index b1af9deac..b8b7a5401 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -666,6 +666,8 @@ patternProperties:
> description: Giantplus Technology Co., Ltd.
> "^gira,.*":
> description: Gira Giersiepen GmbH & Co. KG
> + "^glanda,.*":
> + description: GlandaGPU
> "^glinet,.*":
> description: GL Intelligence, Inc.
> "^globalscale,.*":
> --
> 2.43.0
>
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