| Message ID | 20220405081911.1349563-2-miquel.raynal@bootlin.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | RZN1 DMA support | expand |
On Tue, Apr 5, 2022 at 3:19 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote: > > The Renesas RZN1 DMA IP is based on a DW core, with eg. an additional > dmamux register located in the system control area which can take up to > 32 requests (16 per DMA controller). Each DMA channel can be wired to > two different peripherals. > > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> > Reviewed-by: Rob Herring <robh@kernel.org> > --- > .../bindings/dma/renesas,rzn1-dmamux.yaml | 51 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 52 insertions(+) > create mode 100644 Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml Please send to the DT list so checks run. I've already reviewed this, but what passes does change over time. Such as RiscV cpuidle patches that were picked up after 2 months on Thurs and sent to Linus on Fri... :( Rob
Hi Rob, robh@kernel.org wrote on Tue, 5 Apr 2022 13:12:19 -0500: > On Tue, Apr 5, 2022 at 3:19 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote: > > > > The Renesas RZN1 DMA IP is based on a DW core, with eg. an additional > > dmamux register located in the system control area which can take up to > > 32 requests (16 per DMA controller). Each DMA channel can be wired to > > two different peripherals. > > > > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> > > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> > > Reviewed-by: Rob Herring <robh@kernel.org> > > --- > > .../bindings/dma/renesas,rzn1-dmamux.yaml | 51 +++++++++++++++++++ > > MAINTAINERS | 1 + > > 2 files changed, 52 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml > > Please send to the DT list so checks run. I've already reviewed this, > but what passes does change over time. Such as RiscV cpuidle patches > that were picked up after 2 months on Thurs and sent to Linus on > Fri... :( Oh, ok, no problem. Thanks, Miquèl
diff --git a/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml b/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml new file mode 100644 index 000000000000..d83013b0dd74 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/renesas,rzn1-dmamux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/N1 DMA mux + +maintainers: + - Miquel Raynal <miquel.raynal@bootlin.com> + +allOf: + - $ref: "dma-router.yaml#" + +properties: + compatible: + const: renesas,rzn1-dmamux + + reg: + maxItems: 1 + description: DMA mux first register offset within the system control parent. + + '#dma-cells': + const: 6 + description: + The first four cells are dedicated to the master DMA controller. The fifth + cell gives the DMA mux bit index that must be set starting from 0. The + sixth cell gives the binary value that must be written there, ie. 0 or 1. + + dma-masters: + minItems: 1 + maxItems: 2 + + dma-requests: + const: 32 + +required: + - reg + - dma-requests + +additionalProperties: false + +examples: + - | + dma-router@a0 { + compatible = "renesas,rzn1-dmamux"; + reg = <0xa0 4>; + #dma-cells = <6>; + dma-masters = <&dma0 &dma1>; + dma-requests = <32>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index fd768d43e048..120d3ae57a4b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19040,6 +19040,7 @@ SYNOPSYS DESIGNWARE DMAC DRIVER M: Viresh Kumar <vireshk@kernel.org> R: Andy Shevchenko <andriy.shevchenko@linux.intel.com> S: Maintained +F: Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml F: Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml F: drivers/dma/dw/ F: include/dt-bindings/dma/dw-dmac.h