Re: [PATCH v5 1/2] dt-bindings: dma: Add Loongson-1 DMA

Keguang Zhang
2023-10-07T05:46:06Z

On Fri, Sep 29, 2023 at 12:42 AM Conor Dooley <conor@kernel.org> wrote:
>
> Hey,
>
> On Thu, Sep 28, 2023 at 08:19:52PM +0800, Keguang Zhang wrote:
> > Add devicetree binding document for Loongson-1 DMA.
> >
> > Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
> > ---
> > V4 -> V5:
> > A newly added patch
> >
> > .../bindings/dma/loongson,ls1x-dma.yaml | 64 +++++++++++++++++++
> > 1 file changed, 64 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml b/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml
> > new file mode 100644
> > index 000000000000..51b45d998a58
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml
> > @@ -0,0 +1,64 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/dma/loongson,ls1x-dma.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Loongson-1 DMA Controller
> > +
> > +maintainers:
> > + - Keguang Zhang <keguang.zhang@gmail.com>
> > +
> > +description: |
>
> This | isn't required as you have no formatting to preserve here.
>
Will remove '|'.

> > + Loongson-1 DMA controller provides 3 independent channels for
> > + peripherals such as NAND and AC97.
> > +
> > +properties:
> > + compatible:
> > + enum:
> > + - loongson,ls1b-dma
> > + - loongson,ls1c-dma
>
> From a skim of the driver, these two devices seem to be compatible,
> and therefore one should fall back to the other.
>
Got it. How about changing to one const?
compatible:
const: loongson,ls1-dma

> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + description: Each channel has a dedicated interrupt line.
> > + minItems: 1
> > + maxItems: 3
> > +
> > + interrupt-names:
> > + minItems: 1
> > + items:
> > + - pattern: ch0
> > + - pattern: ch1
> > + - pattern: ch2
> > +
> > + '#dma-cells':
> > + description: The single cell represents the channel index.
>
> This description is unnecessary.
>
Will delete the description.

> > + const: 1
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - interrupt-names
> > + - '#dma-cells'
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > + dma: dma-controller@1fd01160 {
>
> This label is unused.
>
Will delete the lablel.

> > + compatible = "loongson,ls1b-dma";
> > + reg = <0x1fd01160 0x18>;
> > +
> > + interrupt-parent = <&intc0>;
> > + interrupts = <13 IRQ_TYPE_EDGE_RISING>,
> > + <14 IRQ_TYPE_EDGE_RISING>,
> > + <15 IRQ_TYPE_EDGE_RISING>;
>
> Odd mixed indentation here. Bindings use spaces only.
>
Will fix the indentation.

> Thanks,
> Conor.
>
> > + interrupt-names = "ch0", "ch1", "ch2";
> > +
> > + #dma-cells = <1>;
> > + };
> > --
> > 2.39.2
> >

--
Best regards,

Keguang Zhang