| Message ID | 20200923063410.3431917-2-vkoul@kernel.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | dmaengine: Add support for QCOM GSI dma controller | expand |
On Wed, Sep 23, 2020 at 12:04:08PM +0530, Vinod Koul wrote: > Add devicetree binding documentation for GPI DMA controller > implemented on Qualcomm SoCs > > Signed-off-by: Vinod Koul <vkoul@kernel.org> > --- > .../devicetree/bindings/dma/qcom,gpi.yaml | 86 +++++++++++++++++++ > include/dt-bindings/dma/qcom-gpi.h | 11 +++ > 2 files changed, 97 insertions(+) > create mode 100644 Documentation/devicetree/bindings/dma/qcom,gpi.yaml > create mode 100644 include/dt-bindings/dma/qcom-gpi.h > > diff --git a/Documentation/devicetree/bindings/dma/qcom,gpi.yaml b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml > new file mode 100644 > index 000000000000..82f404bc8745 > --- /dev/null > +++ b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml > @@ -0,0 +1,86 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/dma/qcom,gpi.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm Technologies Inc GPI DMA controller > + > +maintainers: > + - Vinod Koul <vkoul@kernel.org> > + > +description: | > + QCOM GPI DMA controller provides DMA capabilities for > + peripheral buses such as I2C, UART, and SPI. > + > +allOf: > + - $ref: "dma-controller.yaml#" > + > +properties: > + compatible: > + enum: > + - qcom,gpi-dma Should be SoC specific. > + > + reg: > + maxItems: 1 > + > + interrupts: > + description: > + Interrupt lines for each GPII instance GPII or GPI? > + maxItems: 13 > + > + "#dma-cells": > + const: 3 > + description: > > + DMA clients must use the format described in dma.txt, giving a phandle > + to the DMA controller plus the following 3 integer cells: > + - channel: if set to 0xffffffff, any available channel will be allocated > + for the client. Otherwise, the exact channel specified will be used. > + - seid: serial id of the client as defined in the SoC documentation. > + - client: type of the client as defined in dt-bindings/dma/qcom-gpi.h > + > + iommus: > + maxItems: 1 > + > + dma-channels: > + maxItems: 1 Not an array. Is there a maximum number of channels or 2^32 is valid? > + > + dma-channel-mask: > + maxItems: 1 So up to 32 channels? > + > +required: > + - compatible > + - reg > + - interrupts > + - "#dma-cells" > + - iommus > + - dma-channels > + - dma-channel-mask > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/dma/qcom-gpi.h> > + gpi_dma0: dma-controller@800000 { > + compatible = "qcom,gpi-dma"; > + #dma-cells = <3>; > + reg = <0x00800000 0x60000>; > + iommus = <&apps_smmu 0x0016 0x0>; > + dma-channels = <13>; > + dma-channel-mask = <0xfa>; > + interrupts = <GIC_SPI 244 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 246 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 249 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 250 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 253 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 254 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 255 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>; > + }; > + > +... > diff --git a/include/dt-bindings/dma/qcom-gpi.h b/include/dt-bindings/dma/qcom-gpi.h > new file mode 100644 > index 000000000000..71f79eb7614c > --- /dev/null > +++ b/include/dt-bindings/dma/qcom-gpi.h > @@ -0,0 +1,11 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* Copyright (c) 2020, Linaro Ltd. */ > + > +#ifndef __DT_BINDINGS_DMA_QCOM_GPI_H__ > +#define __DT_BINDINGS_DMA_QCOM_GPI_H__ > + > +#define QCOM_GPI_SPI 1 > +#define QCOM_GPI_UART 2 > +#define QCOM_GPI_I2C 3 > + > +#endif /* __DT_BINDINGS_DMA_QCOM_GPI_H__ */ > -- > 2.26.2 >
Hi Rob, On 29-09-20, 13:44, Rob Herring wrote: > > +description: | > > + QCOM GPI DMA controller provides DMA capabilities for > > + peripheral buses such as I2C, UART, and SPI. > > + > > +allOf: > > + - $ref: "dma-controller.yaml#" > > + > > +properties: > > + compatible: > > + enum: > > + - qcom,gpi-dma > > Should be SoC specific. Okay, will add > > + > > + reg: > > + maxItems: 1 > > + > > + interrupts: > > + description: > > + Interrupt lines for each GPII instance > > GPII or GPI? Hw uses GPII as "GPI Instance" :) so will update this > > + maxItems: 13 > > + > > + "#dma-cells": > > + const: 3 > > + description: > > > + DMA clients must use the format described in dma.txt, giving a phandle > > + to the DMA controller plus the following 3 integer cells: > > + - channel: if set to 0xffffffff, any available channel will be allocated > > + for the client. Otherwise, the exact channel specified will be used. > > + - seid: serial id of the client as defined in the SoC documentation. > > + - client: type of the client as defined in dt-bindings/dma/qcom-gpi.h > > + > > + iommus: > > + maxItems: 1 > > + > > + dma-channels: > > + maxItems: 1 > > Not an array. Is there a maximum number of channels or 2^32 is valid? I have not seen any max limit put, but we can be assured that it will not go to 2^32, we can put a reasonable limit .. Will add maximum :) > > + > > + dma-channel-mask: > > + maxItems: 1 > > So up to 32 channels? yep!
diff --git a/Documentation/devicetree/bindings/dma/qcom,gpi.yaml b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml new file mode 100644 index 000000000000..82f404bc8745 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml @@ -0,0 +1,86 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/qcom,gpi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Technologies Inc GPI DMA controller + +maintainers: + - Vinod Koul <vkoul@kernel.org> + +description: | + QCOM GPI DMA controller provides DMA capabilities for + peripheral buses such as I2C, UART, and SPI. + +allOf: + - $ref: "dma-controller.yaml#" + +properties: + compatible: + enum: + - qcom,gpi-dma + + reg: + maxItems: 1 + + interrupts: + description: + Interrupt lines for each GPII instance + maxItems: 13 + + "#dma-cells": + const: 3 + description: > + DMA clients must use the format described in dma.txt, giving a phandle + to the DMA controller plus the following 3 integer cells: + - channel: if set to 0xffffffff, any available channel will be allocated + for the client. Otherwise, the exact channel specified will be used. + - seid: serial id of the client as defined in the SoC documentation. + - client: type of the client as defined in dt-bindings/dma/qcom-gpi.h + + iommus: + maxItems: 1 + + dma-channels: + maxItems: 1 + + dma-channel-mask: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - "#dma-cells" + - iommus + - dma-channels + - dma-channel-mask + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/dma/qcom-gpi.h> + gpi_dma0: dma-controller@800000 { + compatible = "qcom,gpi-dma"; + #dma-cells = <3>; + reg = <0x00800000 0x60000>; + iommus = <&apps_smmu 0x0016 0x0>; + dma-channels = <13>; + dma-channel-mask = <0xfa>; + interrupts = <GIC_SPI 244 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 246 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 249 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 250 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 253 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 254 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 255 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>; + }; + +... diff --git a/include/dt-bindings/dma/qcom-gpi.h b/include/dt-bindings/dma/qcom-gpi.h new file mode 100644 index 000000000000..71f79eb7614c --- /dev/null +++ b/include/dt-bindings/dma/qcom-gpi.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2020, Linaro Ltd. */ + +#ifndef __DT_BINDINGS_DMA_QCOM_GPI_H__ +#define __DT_BINDINGS_DMA_QCOM_GPI_H__ + +#define QCOM_GPI_SPI 1 +#define QCOM_GPI_UART 2 +#define QCOM_GPI_I2C 3 + +#endif /* __DT_BINDINGS_DMA_QCOM_GPI_H__ */
Add devicetree binding documentation for GPI DMA controller implemented on Qualcomm SoCs Signed-off-by: Vinod Koul <vkoul@kernel.org> --- .../devicetree/bindings/dma/qcom,gpi.yaml | 86 +++++++++++++++++++ include/dt-bindings/dma/qcom-gpi.h | 11 +++ 2 files changed, 97 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/qcom,gpi.yaml create mode 100644 include/dt-bindings/dma/qcom-gpi.h