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 15properties: 16 compatible: 17 oneOf: 18 - items: 19 - enum: 20 - renesas,r9a06g032-uart 21 - renesas,r9a06g033-uart 22 - const: renesas,rzn1-uart 23 - items: 24 - enum: 25 - rockchip,px30-uart 26 - rockchip,rk1808-uart 27 - rockchip,rk3036-uart 28 - rockchip,rk3066-uart 29 - rockchip,rk3128-uart 30 - rockchip,rk3188-uart 31 - rockchip,rk3288-uart 32 - rockchip,rk3308-uart 33 - rockchip,rk3328-uart 34 - rockchip,rk3368-uart 35 - rockchip,rk3399-uart 36 - rockchip,rk3568-uart 37 - rockchip,rk3588-uart 38 - rockchip,rv1108-uart 39 - rockchip,rv1126-uart 40 - const: snps,dw-apb-uart 41 - items: 42 - enum: 43 - brcm,bcm11351-dw-apb-uart 44 - brcm,bcm21664-dw-apb-uart 45 - const: snps,dw-apb-uart 46 - items: 47 - enum: 48 - starfive,jh7100-hsuart 49 - starfive,jh7100-uart 50 - const: snps,dw-apb-uart 51 - const: snps,dw-apb-uart 52 53 reg: 54 maxItems: 1 55 56 interrupts: 57 maxItems: 1 58 59 clock-frequency: true 60 61 clocks: 62 minItems: 1 63 maxItems: 2 64 65 clock-names: 66 items: 67 - const: baudclk 68 - const: apb_pclk 69 70 dmas: 71 maxItems: 2 72 73 dma-names: 74 items: 75 - const: tx 76 - const: rx 77 78 snps,uart-16550-compatible: 79 description: reflects the value of UART_16550_COMPATIBLE configuration 80 parameter. Define this if your UART does not implement the busy functionality. 81 type: boolean 82 83 resets: 84 maxItems: 1 85 86 reg-shift: true 87 88 reg-io-width: true 89 90 dcd-override: 91 description: Override the DCD modem status signal. This signal will 92 always be reported as active instead of being obtained from the modem 93 status register. Define this if your serial port does not use this 94 pin. 95 type: boolean 96 97 dsr-override: 98 description: Override the DTS modem status signal. This signal will 99 always be reported as active instead of being obtained from the modem 100 status register. Define this if your serial port does not use this 101 pin. 102 type: boolean 103 104 cts-override: 105 description: Override the CTS modem status signal. This signal will 106 always be reported as active instead of being obtained from the modem 107 status register. Define this if your serial port does not use this 108 pin. 109 type: boolean 110 111 ri-override: 112 description: Override the RI modem status signal. This signal will always 113 be reported as inactive instead of being obtained from the modem status 114 register. Define this if your serial port does not use this pin. 115 type: boolean 116 117required: 118 - compatible 119 - reg 120 - interrupts 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