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 16 - if: 17 properties: 18 compatible: 19 contains: 20 const: starfive,jh7110-uart 21 then: 22 properties: 23 resets: 24 minItems: 2 25 else: 26 properties: 27 resets: 28 maxItems: 1 29 30properties: 31 compatible: 32 oneOf: 33 - items: 34 - enum: 35 - renesas,r9a06g032-uart 36 - renesas,r9a06g033-uart 37 - const: renesas,rzn1-uart 38 - items: 39 - enum: 40 - rockchip,px30-uart 41 - rockchip,rk1808-uart 42 - rockchip,rk3036-uart 43 - rockchip,rk3066-uart 44 - rockchip,rk3128-uart 45 - rockchip,rk3188-uart 46 - rockchip,rk3288-uart 47 - rockchip,rk3308-uart 48 - rockchip,rk3328-uart 49 - rockchip,rk3368-uart 50 - rockchip,rk3399-uart 51 - rockchip,rk3568-uart 52 - rockchip,rk3588-uart 53 - rockchip,rv1108-uart 54 - rockchip,rv1126-uart 55 - const: snps,dw-apb-uart 56 - items: 57 - enum: 58 - brcm,bcm11351-dw-apb-uart 59 - brcm,bcm21664-dw-apb-uart 60 - const: snps,dw-apb-uart 61 - items: 62 - enum: 63 - starfive,jh7100-hsuart 64 - starfive,jh7100-uart 65 - starfive,jh7110-uart 66 - const: snps,dw-apb-uart 67 - const: snps,dw-apb-uart 68 69 reg: 70 maxItems: 1 71 72 interrupts: 73 maxItems: 1 74 75 clock-frequency: true 76 77 clocks: 78 minItems: 1 79 maxItems: 2 80 81 clock-names: 82 items: 83 - const: baudclk 84 - const: apb_pclk 85 86 dmas: 87 maxItems: 2 88 89 dma-names: 90 items: 91 - const: tx 92 - const: rx 93 94 snps,uart-16550-compatible: 95 description: reflects the value of UART_16550_COMPATIBLE configuration 96 parameter. Define this if your UART does not implement the busy functionality. 97 type: boolean 98 99 resets: 100 minItems: 1 101 maxItems: 2 102 103 reg-shift: true 104 105 reg-io-width: true 106 107 dcd-override: 108 description: Override the DCD modem status signal. This signal will 109 always be reported as active instead of being obtained from the modem 110 status register. Define this if your serial port does not use this 111 pin. 112 type: boolean 113 114 dsr-override: 115 description: Override the DTS modem status signal. This signal will 116 always be reported as active instead of being obtained from the modem 117 status register. Define this if your serial port does not use this 118 pin. 119 type: boolean 120 121 cts-override: 122 description: Override the CTS modem status signal. This signal will 123 always be reported as active instead of being obtained from the modem 124 status register. Define this if your serial port does not use this 125 pin. 126 type: boolean 127 128 ri-override: 129 description: Override the RI modem status signal. This signal will always 130 be reported as inactive instead of being obtained from the modem status 131 register. Define this if your serial port does not use this pin. 132 type: boolean 133 134required: 135 - compatible 136 - reg 137 138unevaluatedProperties: false 139 140examples: 141 - | 142 serial@80230000 { 143 compatible = "snps,dw-apb-uart"; 144 reg = <0x80230000 0x100>; 145 clock-frequency = <3686400>; 146 interrupts = <10>; 147 reg-shift = <2>; 148 reg-io-width = <4>; 149 dcd-override; 150 dsr-override; 151 cts-override; 152 ri-override; 153 }; 154 155 - | 156 // Example with one clock: 157 serial@80230000 { 158 compatible = "snps,dw-apb-uart"; 159 reg = <0x80230000 0x100>; 160 clocks = <&baudclk>; 161 interrupts = <10>; 162 reg-shift = <2>; 163 reg-io-width = <4>; 164 }; 165 166 - | 167 // Example with two clocks: 168 serial@80230000 { 169 compatible = "snps,dw-apb-uart"; 170 reg = <0x80230000 0x100>; 171 clocks = <&baudclk>, <&apb_pclk>; 172 clock-names = "baudclk", "apb_pclk"; 173 interrupts = <10>; 174 reg-shift = <2>; 175 reg-io-width = <4>; 176 }; 177... 178