1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/serial/samsung_uart.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Samsung S3C, S5P and Exynos SoC UART Controller 8 9maintainers: 10 - Krzysztof Kozlowski <krzk@kernel.org> 11 - Greg Kroah-Hartman <gregkh@linuxfoundation.org> 12 13description: |+ 14 Each Samsung UART should have an alias correctly numbered in the "aliases" 15 node, according to serialN format, where N is the port number (non-negative 16 decimal integer) as specified by User's Manual of respective SoC. 17 18properties: 19 compatible: 20 items: 21 - enum: 22 - samsung,s3c2410-uart 23 - samsung,s3c2412-uart 24 - samsung,s3c2440-uart 25 - samsung,s3c6400-uart 26 - samsung,s5pv210-uart 27 - samsung,exynos4210-uart 28 29 reg: 30 maxItems: 1 31 32 clocks: 33 minItems: 2 34 maxItems: 5 35 36 clock-names: 37 description: N = 0 is allowed for SoCs without internal baud clock mux. 38 minItems: 2 39 maxItems: 5 40 items: 41 - const: uart 42 - pattern: '^clk_uart_baud[0-3]$' 43 - pattern: '^clk_uart_baud[0-3]$' 44 - pattern: '^clk_uart_baud[0-3]$' 45 - pattern: '^clk_uart_baud[0-3]$' 46 47 interrupts: 48 description: RX interrupt and optionally TX interrupt. 49 minItems: 1 50 maxItems: 2 51 52 samsung,uart-fifosize: 53 description: The fifo size supported by the UART channel. 54 $ref: /schemas/types.yaml#/definitions/uint32 55 enum: [16, 64, 256] 56 57required: 58 - compatible 59 - clocks 60 - clock-names 61 - interrupts 62 - reg 63 64allOf: 65 - if: 66 properties: 67 compatible: 68 contains: 69 enum: 70 - samsung,s3c2410-uart 71 - samsung,s5pv210-uart 72 then: 73 properties: 74 clocks: 75 minItems: 2 76 maxItems: 3 77 clock-names: 78 minItems: 2 79 maxItems: 3 80 items: 81 - const: uart 82 - pattern: '^clk_uart_baud[0-1]$' 83 - pattern: '^clk_uart_baud[0-1]$' 84 85 - if: 86 properties: 87 compatible: 88 contains: 89 enum: 90 - samsung,exynos4210-uart 91 then: 92 properties: 93 clocks: 94 minItems: 2 95 maxItems: 2 96 clock-names: 97 minItems: 2 98 maxItems: 2 99 items: 100 - const: uart 101 - const: clk_uart_baud0 102 103examples: 104 - | 105 #include <dt-bindings/clock/samsung,s3c64xx-clock.h> 106 107 uart0: serial@7f005000 { 108 compatible = "samsung,s3c6400-uart"; 109 reg = <0x7f005000 0x100>; 110 interrupt-parent = <&vic1>; 111 interrupts = <5>; 112 clock-names = "uart", "clk_uart_baud2", 113 "clk_uart_baud3"; 114 clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>, 115 <&clocks SCLK_UART>; 116 samsung,uart-fifosize = <16>; 117 }; 118