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,rk3588-uart 37 - rockchip,rv1108-uart 38 - rockchip,rv1126-uart 39 - const: snps,dw-apb-uart 40 - items: 41 - enum: 42 - brcm,bcm11351-dw-apb-uart 43 - brcm,bcm21664-dw-apb-uart 44 - const: snps,dw-apb-uart 45 - items: 46 - enum: 47 - starfive,jh7100-hsuart 48 - starfive,jh7100-uart 49 - const: snps,dw-apb-uart 50 - const: snps,dw-apb-uart 51 52 reg: 53 maxItems: 1 54 55 interrupts: 56 maxItems: 1 57 58 clock-frequency: true 59 60 clocks: 61 minItems: 1 62 maxItems: 2 63 64 clock-names: 65 items: 66 - const: baudclk 67 - const: apb_pclk 68 69 snps,uart-16550-compatible: 70 description: reflects the value of UART_16550_COMPATIBLE configuration 71 parameter. Define this if your UART does not implement the busy functionality. 72 type: boolean 73 74 resets: 75 maxItems: 1 76 77 reg-shift: true 78 79 reg-io-width: true 80 81 dcd-override: 82 description: Override the DCD modem status signal. This signal will 83 always be reported as active instead of being obtained from the modem 84 status register. Define this if your serial port does not use this 85 pin. 86 type: boolean 87 88 dsr-override: 89 description: Override the DTS modem status signal. This signal will 90 always be reported as active instead of being obtained from the modem 91 status register. Define this if your serial port does not use this 92 pin. 93 type: boolean 94 95 cts-override: 96 description: Override the CTS modem status signal. This signal will 97 always be reported as active instead of being obtained from the modem 98 status register. Define this if your serial port does not use this 99 pin. 100 type: boolean 101 102 ri-override: 103 description: Override the RI modem status signal. This signal will always 104 be reported as inactive instead of being obtained from the modem status 105 register. Define this if your serial port does not use this pin. 106 type: boolean 107 108required: 109 - compatible 110 - reg 111 - interrupts 112 113unevaluatedProperties: false 114 115examples: 116 - | 117 serial@80230000 { 118 compatible = "snps,dw-apb-uart"; 119 reg = <0x80230000 0x100>; 120 clock-frequency = <3686400>; 121 interrupts = <10>; 122 reg-shift = <2>; 123 reg-io-width = <4>; 124 dcd-override; 125 dsr-override; 126 cts-override; 127 ri-override; 128 }; 129 130 - | 131 // Example with one clock: 132 serial@80230000 { 133 compatible = "snps,dw-apb-uart"; 134 reg = <0x80230000 0x100>; 135 clocks = <&baudclk>; 136 interrupts = <10>; 137 reg-shift = <2>; 138 reg-io-width = <4>; 139 }; 140 141 - | 142 // Example with two clocks: 143 serial@80230000 { 144 compatible = "snps,dw-apb-uart"; 145 reg = <0x80230000 0x100>; 146 clocks = <&baudclk>, <&apb_pclk>; 147 clock-names = "baudclk", "apb_pclk"; 148 interrupts = <10>; 149 reg-shift = <2>; 150 reg-io-width = <4>; 151 }; 152... 153