On Sun, Mar 17, 2024 at 10:40 PM Conor Dooley <conor@xxxxxxxxxx> wrote: > > On Sat, Mar 16, 2024 at 07:33:53PM +0800, Keguang Zhang via B4 Relay wrote: > > From: Keguang Zhang <keguang.zhang@xxxxxxxxx> > > > > Add devicetree binding document for Loongson-1 DMA. > > > > Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx> > > --- > > V5 -> V6: > > Change the compatible to the fallback > > Some minor fixes > > V4 -> V5: > > A newly added patch > > --- > > .../devicetree/bindings/dma/loongson,ls1x-dma.yaml | 66 ++++++++++++++++++++++ > > 1 file changed, 66 insertions(+) > > > > 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..06358df725c6 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml > > @@ -0,0 +1,66 @@ > > +# 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@xxxxxxxxx> > > + > > +description: > > + Loongson-1 DMA controller provides 3 independent channels for > > + peripherals such as NAND and AC97. > > + > > +properties: > > + compatible: > > + oneOf: > > + - const: loongson,ls1b-dma > > + - items: > > + - enum: > > + - loongson,ls1c-dma > > + - const: loongson,ls1b-dma > > Aren't there several more devices in this family? Do they not have DMA > controllers? > You are right. Loongson1 is a SoC family. However, only 1A/1B/1C have DMA controller. > > + > > + reg: > > + maxItems: 1 > > + > > + interrupts: > > + description: Each channel has a dedicated interrupt line. > > + minItems: 1 > > + maxItems: 3 > > Is this number not fixed for each SoC? > Yes. Actually, it's fixed for the whole family. > > + interrupt-names: > > + minItems: 1 > > + items: > > + - pattern: ch0 > > + - pattern: ch1 > > + - pattern: ch2 > > Why have you made these a pattern? There's no regex being used here at > all. > Will change items to the following regex. interrupt-names: minItems: 1 items: - pattern: "^ch[0-2]$" Thanks! > Cheers, > Cono4. -- Best regards, Keguang Zhang
