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113 lines
2.8 KiB
YAML
113 lines
2.8 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/serial/qcom,msm-uartdm.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm MSM Serial UARTDM
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maintainers:
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- Andy Gross <agross@kernel.org>
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- Bjorn Andersson <bjorn.andersson@linaro.org>
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- Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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description: |
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The MSM serial UARTDM hardware is designed for high-speed use cases where the
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transmit and/or receive channels can be offloaded to a dma-engine. From a
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software perspective it's mostly compatible with the MSM serial UART except
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that it supports reading and writing multiple characters at a time.
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Note:: Aliases may be defined to ensure the correct ordering of the UARTs.
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The alias serialN will result in the UART being assigned port N. If any
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serialN alias exists, then an alias must exist for each enabled UART. The
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serialN aliases should be in a .dts file instead of in a .dtsi file.
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properties:
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compatible:
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items:
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- enum:
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- qcom,msm-uartdm-v1.1
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- qcom,msm-uartdm-v1.2
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- qcom,msm-uartdm-v1.3
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- qcom,msm-uartdm-v1.4
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- const: qcom,msm-uartdm
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clocks:
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maxItems: 2
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clock-names:
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items:
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- const: core
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- const: iface
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dmas:
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maxItems: 2
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dma-names:
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items:
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- const: tx
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- const: rx
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interrupts:
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maxItems: 1
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qcom,rx-crci:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Identificator for Client Rate Control Interface to be used with RX DMA
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channel. Required when using DMA for reception with UARTDM v1.3 and
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below.
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qcom,tx-crci:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Identificator for Client Rate Control Interface to be used with TX DMA
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channel. Required when using DMA for transmission with UARTDM v1.3 and
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below.
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reg:
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minItems: 1
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items:
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- description: Main control registers
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- description: An optional second register location shall specify the GSBI control region.
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required:
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- compatible
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- clock-names
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- clocks
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- interrupts
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- reg
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unevaluatedProperties: false
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allOf:
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- $ref: /schemas/serial/serial.yaml#
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- if:
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properties:
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compatible:
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contains:
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const: qcom,msm-uartdm-v1.3
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then:
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properties:
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reg:
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minItems: 2
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else:
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properties:
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reg:
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maxItems: 1
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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serial@f991e000 {
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compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
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reg = <0xf991e000 0x1000>;
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interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>;
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clock-names = "core", "iface";
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dmas = <&dma0 0>, <&dma0 1>;
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dma-names = "tx", "rx";
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};
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