[PATCH v4 04/14] dt-bindings: dma: dw-axi-dmac: extend the number of interrupts

Conor Dooley
2022-07-01T19:24:08Z

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