0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 # Copyright 2019 Unisoc Inc.
0003 %YAML 1.2
0004 ---
0005 $id: "http://devicetree.org/schemas/serial/sprd-uart.yaml#"
0006 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
0007
0008 title: Spreadtrum serial UART
0009
0010 maintainers:
0011 - Orson Zhai <orsonzhai@gmail.com>
0012 - Baolin Wang <baolin.wang7@gmail.com>
0013 - Chunyan Zhang <zhang.lyra@gmail.com>
0014
0015 properties:
0016 compatible:
0017 oneOf:
0018 - items:
0019 - enum:
0020 - sprd,sc9860-uart
0021 - sprd,sc9863a-uart
0022 - sprd,ums512-uart
0023 - const: sprd,sc9836-uart
0024 - const: sprd,sc9836-uart
0025
0026 reg:
0027 maxItems: 1
0028
0029 interrupts:
0030 maxItems: 1
0031
0032 clocks:
0033 minItems: 1
0034 maxItems: 3
0035
0036 clock-names:
0037 description: |
0038 "enable" for UART module enable clock, "uart" for UART clock, "source"
0039 for UART source (parent) clock.
0040 items:
0041 - const: enable
0042 - const: uart
0043 - const: source
0044
0045 dmas:
0046 minItems: 1
0047 maxItems: 2
0048
0049 dma-names:
0050 minItems: 1
0051 items:
0052 - const: rx
0053 - const: tx
0054
0055 required:
0056 - compatible
0057 - reg
0058 - interrupts
0059
0060 additionalProperties: false
0061
0062 examples:
0063 - |
0064 #include <dt-bindings/interrupt-controller/arm-gic.h>
0065 serial@0 {
0066 compatible = "sprd,sc9860-uart", "sprd,sc9836-uart";
0067 reg = <0x0 0x100>;
0068 interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
0069 dma-names = "rx", "tx";
0070 dmas = <&ap_dma 19>, <&ap_dma 20>;
0071 clock-names = "enable", "uart", "source";
0072 clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>;
0073 };
0074
0075 ...
