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Date: Wed, 5 Jan 2022 13:43:59 +0800 From: Zong Li <zong.li@...ive.com> To: robh+dt@...nel.org, paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu, krzysztof.kozlowski@...onical.com, conor.dooley@...rochip.com, geert@...ux-m68k.org, bin.meng@...driver.com, green.wan@...ive.com, vkoul@...nel.org, dmaengine@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org Cc: Zong Li <zong.li@...ive.com> Subject: [PATCH 2/3] dt-bindings: Add dma-channels for pdma device node Add dma-channels property, then we can determine how many channels there by device tree, rather than statically defines it in PDMA driver Signed-off-by: Zong Li <zong.li@...ive.com> --- .../devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml index d32a71b975fe..256bcb111d57 100644 --- a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml +++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml @@ -34,12 +34,17 @@ properties: minItems: 1 maxItems: 8 + dma-channels: + minimum: 1 + maximum: 4 + '#dma-cells': const: 1 required: - compatible - reg + - dma-channels - interrupts - '#dma-cells' @@ -50,6 +55,7 @@ examples: dma@...0000 { compatible = "sifive,fu540-c000-pdma"; reg = <0x3000000 0x8000>; + dma-channels = <4>; interrupts = <23 24 25 26 27 28 29 30>; #dma-cells = <1>; }; -- 2.31.1
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