1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/serial/snps-dw-apb-uart.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Synopsys DesignWare ABP UART 8 9maintainers: 10 - Rob Herring <robh@kernel.org> 11 12allOf: 13 - $ref: serial.yaml# 14 - $ref: rs485.yaml# 15 16properties: 17 compatible: 18 oneOf: 19 - items: 20 - enum: 21 - renesas,r9a06g032-uart 22 - renesas,r9a06g033-uart 23 - const: renesas,rzn1-uart 24 - items: 25 - enum: 26 - rockchip,px30-uart 27 - rockchip,rk1808-uart 28 - rockchip,rk3036-uart 29 - rockchip,rk3066-uart 30 - rockchip,rk3128-uart 31 - rockchip,rk3188-uart 32 - rockchip,rk3288-uart 33 - rockchip,rk3308-uart 34 - rockchip,rk3328-uart 35 - rockchip,rk3368-uart 36 - rockchip,rk3399-uart 37 - rockchip,rk3568-uart 38 - rockchip,rk3588-uart 39 - rockchip,rv1108-uart 40 - rockchip,rv1126-uart 41 - const: snps,dw-apb-uart 42 - items: 43 - enum: 44 - brcm,bcm11351-dw-apb-uart 45 - brcm,bcm21664-dw-apb-uart 46 - const: snps,dw-apb-uart 47 - items: 48 - enum: 49 - starfive,jh7100-hsuart 50 - starfive,jh7100-uart 51 - const: snps,dw-apb-uart 52 - const: snps,dw-apb-uart 53 54 reg: 55 maxItems: 1 56 57 interrupts: 58 maxItems: 1 59 60 clock-frequency: true 61 62 clocks: 63 minItems: 1 64 maxItems: 2 65 66 clock-names: 67 items: 68 - const: baudclk 69 - const: apb_pclk 70 71 dmas: 72 maxItems: 2 73 74 dma-names: 75 items: 76 - const: tx 77 - const: rx 78 79 snps,uart-16550-compatible: 80 description: reflects the value of UART_16550_COMPATIBLE configuration 81 parameter. Define this if your UART does not implement the busy functionality. 82 type: boolean 83 84 resets: 85 maxItems: 1 86 87 reg-shift: true 88 89 reg-io-width: true 90 91 dcd-override: 92 description: Override the DCD modem status signal. This signal will 93 always be reported as active instead of being obtained from the modem 94 status register. Define this if your serial port does not use this 95 pin. 96 type: boolean 97 98 dsr-override: 99 description: Override the DTS modem status signal. This signal will 100 always be reported as active instead of being obtained from the modem 101 status register. Define this if your serial port does not use this 102 pin. 103 type: boolean 104 105 cts-override: 106 description: Override the CTS modem status signal. This signal will 107 always be reported as active instead of being obtained from the modem 108 status register. Define this if your serial port does not use this 109 pin. 110 type: boolean 111 112 ri-override: 113 description: Override the RI modem status signal. This signal will always 114 be reported as inactive instead of being obtained from the modem status 115 register. Define this if your serial port does not use this pin. 116 type: boolean 117 118required: 119 - compatible 120 - reg 121 122unevaluatedProperties: false 123 124examples: 125 - | 126 serial@80230000 { 127 compatible = "snps,dw-apb-uart"; 128 reg = <0x80230000 0x100>; 129 clock-frequency = <3686400>; 130 interrupts = <10>; 131 reg-shift = <2>; 132 reg-io-width = <4>; 133 dcd-override; 134 dsr-override; 135 cts-override; 136 ri-override; 137 }; 138 139 - | 140 // Example with one clock: 141 serial@80230000 { 142 compatible = "snps,dw-apb-uart"; 143 reg = <0x80230000 0x100>; 144 clocks = <&baudclk>; 145 interrupts = <10>; 146 reg-shift = <2>; 147 reg-io-width = <4>; 148 }; 149 150 - | 151 // Example with two clocks: 152 serial@80230000 { 153 compatible = "snps,dw-apb-uart"; 154 reg = <0x80230000 0x100>; 155 clocks = <&baudclk>, <&apb_pclk>; 156 clock-names = "baudclk", "apb_pclk"; 157 interrupts = <10>; 158 reg-shift = <2>; 159 reg-io-width = <4>; 160 }; 161... 162