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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 28/06/2022 00:29, Rob Herring wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On Sat, Jun 18, 2022 at 01:30:26PM +0100, Conor Dooley wrote: >> From: Conor Dooley >> >> 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? Seemingly... > >> >> Link: https://canaan-creative.com/wp-content/uploads/2020/03/kendryte_standalone_programming_guide_20190311144158_en.pdf #Page 58 >> Signed-off-by: Conor Dooley >> --- >> .../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. That's what it has been using until now. Am I sure? No. Do I have docs to go check against? Unfortunately, also no. Does it not qualify as a fallback compatible if it supports a subset of what the hardware does? > >> + - 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 >> /* 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? :facepalm:, committed my dt_binding_check test Thanks Rob, Conor. > >> #dma-cells = <1>; >> dma-channels = <4>; >> snps,dma-masters = <2>; >> -- >> 2.36.1 >> >> _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv