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From:   Conor Dooley <conor@kernel.org>
To:     David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
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        Vinod Koul <vkoul@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Serge Semin <fancer.lancer@gmail.com>,
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Cc:     Paul Walmsley <paul.walmsley@sifive.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Conor Dooley <conor.dooley@microchip.com>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Damien Le Moal <damien.lemoal@opensource.wdc.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
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        Dillon Min <dillon.minfei@gmail.com>,
        Jose Abreu <joabreu@synopsys.com>,
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        linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
        alsa-devel@alsa-project.org, linux-riscv@lists.infradead.org
Subject: [PATCH v4 04/14] dt-bindings: dma: dw-axi-dmac: extend the number of interrupts
Date:   Fri,  1 Jul 2022 20:22:50 +0100
Message-Id: <20220701192300.2293643-5-conor@kernel.org>
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From: Conor Dooley <conor.dooley@microchip.com>

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. Support the 6 interrupt
configuration by unconditionally extending the binding to a maximum of
8 per-channel interrupts thereby matching the number of possible
channels.

Link: https://canaan-creative.com/wp-content/uploads/2020/03/kendryte_standalone_programming_guide_20190311144158_en.pdf #Page 51
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../devicetree/bindings/dma/snps,dw-axi-dmac.yaml          | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
index 4324a94b26b2..98c2ab18d04f 100644
--- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
+++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
@@ -34,7 +34,12 @@ properties:
       - const: axidma_apb_regs
 
   interrupts:
-    maxItems: 1
+    description: |
+      If the IP-core synthesis parameter DMAX_INTR_IO_TYPE is set to 1, this
+      will be per-channel interrupts. Otherwise, this is a single combined IRQ
+      for all channels.
+    minItems: 1
+    maxItems: 8
 
   clocks:
     items:
-- 
2.37.0