On Sat, Jun 18, 2022 at 01:30:26PM +0100, Conor Dooley wrote: > From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> > > The Canaan k210 apparently has a Sysnopsys Designware AXI DMA > controller, but according to the documentation & devicetree it has 6 > interrupts rather than the standard one. Add a custom compatible that > supports the 6 interrupt configuration which falls back to the standard > binding which is currently the one in use in the devicetree entry. But it works with only 1 interrupt? > > Link: https://canaan-creative.com/wp-content/uploads/2020/03/kendryte_standalone_programming_guide_20190311144158_en.pdf #Page 58 > Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> > --- > .../bindings/dma/snps,dw-axi-dmac.yaml | 35 ++++++++++++++----- > 1 file changed, 26 insertions(+), 9 deletions(-) > > diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > index 4324a94b26b2..bc85598151ef 100644 > --- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > @@ -18,9 +18,13 @@ allOf: > > properties: > compatible: > - enum: > - - snps,axi-dma-1.01a > - - intel,kmb-axi-dma > + oneOf: > + - items: > + - const: canaan,k210-axi-dma > + - const: snps,axi-dma-1.01a I would drop this depending on your need for compatibility. Are you sure on the IP version? It's not really compatible if the number of interrupts is different. > + - enum: > + - snps,axi-dma-1.01a > + - intel,kmb-axi-dma > > reg: > minItems: 1 > @@ -33,9 +37,6 @@ properties: > - const: axidma_ctrl_regs > - const: axidma_apb_regs > > - interrupts: > - maxItems: 1 > - > clocks: > items: > - description: Bus Clock > @@ -92,6 +93,22 @@ properties: > minimum: 1 > maximum: 256 > > +if: > + properties: > + compatible: > + contains: > + const: canaan,k210-axi-dma > + > +then: > + properties: > + interrupts: > + maxItems: 6 > + > +else: > + properties: > + interrupts: > + maxItems: 1 > + > required: > - compatible > - reg > @@ -105,7 +122,7 @@ required: > - snps,priority > - snps,block-size > > -additionalProperties: false > +unevaluatedProperties: false > > examples: > - | > @@ -113,12 +130,12 @@ examples: > #include <dt-bindings/interrupt-controller/irq.h> > /* example with snps,dw-axi-dmac */ > dmac: dma-controller@80000 { > - compatible = "snps,axi-dma-1.01a"; > + compatible = "canaan,k210-axi-dma", "snps,axi-dma-1.01a"; > reg = <0x80000 0x400>; > clocks = <&core_clk>, <&cfgr_clk>; > clock-names = "core-clk", "cfgr-clk"; > interrupt-parent = <&intc>; > - interrupts = <27>; > + interrupts = <27>, <28>, <29>, <30>, <31>, <32>; Does the example really need changing? The old one was correct, right? > #dma-cells = <1>; > dma-channels = <4>; > snps,dma-masters = <2>; > -- > 2.36.1 > >
