From 4d28f38f64ef69ab27839069ef3346c3c878d137 Mon Sep 17 00:00:00 2001 From: Cosmin Tanislav Date: Wed, 28 Jan 2026 23:51:30 +0200 Subject: [PATCH] spi: dt-bindings: renesas,rzv2h-rspi: allow multiple DMAs All supported SoCs have multiple DMA controllers that can be used with the RSPI peripheral. The current bindings only allow a single pair of RX and TX DMAs. The DMA core allows specifying multiple DMAs with the same name, and it will pick the first available one. There is an exception in the base dt-schema rules specifically for allowing this behavior (dtschema/schemas/dma/dma.yaml). dma-names: anyOf: - uniqueItems: true - items: # Hack around Renesas bindings which repeat entries to support # multiple possible DMA providers enum: [rx, tx] Allow multiple DMAs to have the same name and only restrict the possible names of the DMA channels, not their count. For RZ/T2H and RZ/N2H SoCs, limit the number of DMA channels to 6, as they have 3 DMA controllers. For RZ/V2H and RZ/V2N SoCs, limit the number of DMA channels to 10, as they have 5 DMA controllers. Signed-off-by: Cosmin Tanislav Acked-by: Conor Dooley Link: https://patch.msgid.link/20260128215132.1353381-2-cosmin-gabriel.tanislav.xa@renesas.com Signed-off-by: Mark Brown --- .../bindings/spi/renesas,rzv2h-rspi.yaml | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/spi/renesas,rzv2h-rspi.yaml b/Documentation/devicetree/bindings/spi/renesas,rzv2h-rspi.yaml index a588b112e11e..cf8b733b766d 100644 --- a/Documentation/devicetree/bindings/spi/renesas,rzv2h-rspi.yaml +++ b/Documentation/devicetree/bindings/spi/renesas,rzv2h-rspi.yaml @@ -58,12 +58,16 @@ properties: - const: tresetn dmas: - maxItems: 2 + minItems: 2 + maxItems: 10 dma-names: + minItems: 2 + maxItems: 10 items: - - const: rx - - const: tx + enum: + - rx + - tx power-domains: maxItems: 1 @@ -121,6 +125,12 @@ allOf: resets: false reset-names: false + dmas: + maxItems: 6 + + dma-names: + maxItems: 6 + unevaluatedProperties: false examples: