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,rk3188-uart 30 - rockchip,rk3288-uart 31 - rockchip,rk3308-uart 32 - rockchip,rk3328-uart 33 - rockchip,rk3368-uart 34 - rockchip,rk3399-uart 35 - rockchip,rk3568-uart 36 - rockchip,rv1108-uart 37 - const: snps,dw-apb-uart 38 - items: 39 - enum: 40 - brcm,bcm11351-dw-apb-uart 41 - brcm,bcm21664-dw-apb-uart 42 - const: snps,dw-apb-uart 43 - items: 44 - enum: 45 - starfive,jh7100-hsuart 46 - starfive,jh7100-uart 47 - const: snps,dw-apb-uart 48 - const: snps,dw-apb-uart 49 50 reg: 51 maxItems: 1 52 53 interrupts: 54 maxItems: 1 55 56 clock-frequency: true 57 58 clocks: 59 minItems: 1 60 maxItems: 2 61 62 clock-names: 63 items: 64 - const: baudclk 65 - const: apb_pclk 66 67 snps,uart-16550-compatible: 68 description: reflects the value of UART_16550_COMPATIBLE configuration 69 parameter. Define this if your UART does not implement the busy functionality. 70 type: boolean 71 72 resets: 73 maxItems: 1 74 75 reg-shift: true 76 77 reg-io-width: true 78 79 dcd-override: 80 description: Override the DCD modem status signal. This signal will 81 always be reported as active instead of being obtained from the modem 82 status register. Define this if your serial port does not use this 83 pin. 84 type: boolean 85 86 dsr-override: 87 description: Override the DTS modem status signal. This signal will 88 always be reported as active instead of being obtained from the modem 89 status register. Define this if your serial port does not use this 90 pin. 91 type: boolean 92 93 cts-override: 94 description: Override the CTS modem status signal. This signal will 95 always be reported as active instead of being obtained from the modem 96 status register. Define this if your serial port does not use this 97 pin. 98 type: boolean 99 100 ri-override: 101 description: Override the RI modem status signal. This signal will always 102 be reported as inactive instead of being obtained from the modem status 103 register. Define this if your serial port does not use this pin. 104 type: boolean 105 106required: 107 - compatible 108 - reg 109 - interrupts 110 111unevaluatedProperties: false 112 113examples: 114 - | 115 serial@80230000 { 116 compatible = "snps,dw-apb-uart"; 117 reg = <0x80230000 0x100>; 118 clock-frequency = <3686400>; 119 interrupts = <10>; 120 reg-shift = <2>; 121 reg-io-width = <4>; 122 dcd-override; 123 dsr-override; 124 cts-override; 125 ri-override; 126 }; 127 128 - | 129 // Example with one clock: 130 serial@80230000 { 131 compatible = "snps,dw-apb-uart"; 132 reg = <0x80230000 0x100>; 133 clocks = <&baudclk>; 134 interrupts = <10>; 135 reg-shift = <2>; 136 reg-io-width = <4>; 137 }; 138 139 - | 140 // Example with two clocks: 141 serial@80230000 { 142 compatible = "snps,dw-apb-uart"; 143 reg = <0x80230000 0x100>; 144 clocks = <&baudclk>, <&apb_pclk>; 145 clock-names = "baudclk", "apb_pclk"; 146 interrupts = <10>; 147 reg-shift = <2>; 148 reg-io-width = <4>; 149 }; 150... 151