1*c66ec88fSEmmanuel Vadot# SPDX-License-Identifier: GPL-2.0 2*c66ec88fSEmmanuel Vadot%YAML 1.2 3*c66ec88fSEmmanuel Vadot--- 4*c66ec88fSEmmanuel Vadot$id: http://devicetree.org/schemas/serial/samsung_uart.yaml# 5*c66ec88fSEmmanuel Vadot$schema: http://devicetree.org/meta-schemas/core.yaml# 6*c66ec88fSEmmanuel Vadot 7*c66ec88fSEmmanuel Vadottitle: Samsung S3C, S5P and Exynos SoC UART Controller 8*c66ec88fSEmmanuel Vadot 9*c66ec88fSEmmanuel Vadotmaintainers: 10*c66ec88fSEmmanuel Vadot - Krzysztof Kozlowski <krzk@kernel.org> 11*c66ec88fSEmmanuel Vadot - Greg Kroah-Hartman <gregkh@linuxfoundation.org> 12*c66ec88fSEmmanuel Vadot 13*c66ec88fSEmmanuel Vadotdescription: |+ 14*c66ec88fSEmmanuel Vadot Each Samsung UART should have an alias correctly numbered in the "aliases" 15*c66ec88fSEmmanuel Vadot node, according to serialN format, where N is the port number (non-negative 16*c66ec88fSEmmanuel Vadot decimal integer) as specified by User's Manual of respective SoC. 17*c66ec88fSEmmanuel Vadot 18*c66ec88fSEmmanuel Vadotproperties: 19*c66ec88fSEmmanuel Vadot compatible: 20*c66ec88fSEmmanuel Vadot items: 21*c66ec88fSEmmanuel Vadot - enum: 22*c66ec88fSEmmanuel Vadot - samsung,s3c2410-uart 23*c66ec88fSEmmanuel Vadot - samsung,s3c2412-uart 24*c66ec88fSEmmanuel Vadot - samsung,s3c2440-uart 25*c66ec88fSEmmanuel Vadot - samsung,s3c6400-uart 26*c66ec88fSEmmanuel Vadot - samsung,s5pv210-uart 27*c66ec88fSEmmanuel Vadot - samsung,exynos4210-uart 28*c66ec88fSEmmanuel Vadot 29*c66ec88fSEmmanuel Vadot reg: 30*c66ec88fSEmmanuel Vadot maxItems: 1 31*c66ec88fSEmmanuel Vadot 32*c66ec88fSEmmanuel Vadot reg-io-width: 33*c66ec88fSEmmanuel Vadot description: | 34*c66ec88fSEmmanuel Vadot The size (in bytes) of the IO accesses that should be performed 35*c66ec88fSEmmanuel Vadot on the device. 36*c66ec88fSEmmanuel Vadot $ref: /schemas/types.yaml#/definitions/uint32 37*c66ec88fSEmmanuel Vadot enum: [ 1, 4 ] 38*c66ec88fSEmmanuel Vadot 39*c66ec88fSEmmanuel Vadot clocks: 40*c66ec88fSEmmanuel Vadot minItems: 2 41*c66ec88fSEmmanuel Vadot maxItems: 5 42*c66ec88fSEmmanuel Vadot 43*c66ec88fSEmmanuel Vadot clock-names: 44*c66ec88fSEmmanuel Vadot description: N = 0 is allowed for SoCs without internal baud clock mux. 45*c66ec88fSEmmanuel Vadot minItems: 2 46*c66ec88fSEmmanuel Vadot maxItems: 5 47*c66ec88fSEmmanuel Vadot items: 48*c66ec88fSEmmanuel Vadot - const: uart 49*c66ec88fSEmmanuel Vadot - pattern: '^clk_uart_baud[0-3]$' 50*c66ec88fSEmmanuel Vadot - pattern: '^clk_uart_baud[0-3]$' 51*c66ec88fSEmmanuel Vadot - pattern: '^clk_uart_baud[0-3]$' 52*c66ec88fSEmmanuel Vadot - pattern: '^clk_uart_baud[0-3]$' 53*c66ec88fSEmmanuel Vadot 54*c66ec88fSEmmanuel Vadot interrupts: 55*c66ec88fSEmmanuel Vadot description: RX interrupt and optionally TX interrupt. 56*c66ec88fSEmmanuel Vadot minItems: 1 57*c66ec88fSEmmanuel Vadot maxItems: 2 58*c66ec88fSEmmanuel Vadot 59*c66ec88fSEmmanuel Vadot samsung,uart-fifosize: 60*c66ec88fSEmmanuel Vadot description: The fifo size supported by the UART channel. 61*c66ec88fSEmmanuel Vadot $ref: /schemas/types.yaml#/definitions/uint32 62*c66ec88fSEmmanuel Vadot enum: [16, 64, 256] 63*c66ec88fSEmmanuel Vadot 64*c66ec88fSEmmanuel Vadotrequired: 65*c66ec88fSEmmanuel Vadot - compatible 66*c66ec88fSEmmanuel Vadot - clocks 67*c66ec88fSEmmanuel Vadot - clock-names 68*c66ec88fSEmmanuel Vadot - interrupts 69*c66ec88fSEmmanuel Vadot - reg 70*c66ec88fSEmmanuel Vadot 71*c66ec88fSEmmanuel VadotallOf: 72*c66ec88fSEmmanuel Vadot - if: 73*c66ec88fSEmmanuel Vadot properties: 74*c66ec88fSEmmanuel Vadot compatible: 75*c66ec88fSEmmanuel Vadot contains: 76*c66ec88fSEmmanuel Vadot enum: 77*c66ec88fSEmmanuel Vadot - samsung,s3c2410-uart 78*c66ec88fSEmmanuel Vadot - samsung,s5pv210-uart 79*c66ec88fSEmmanuel Vadot then: 80*c66ec88fSEmmanuel Vadot properties: 81*c66ec88fSEmmanuel Vadot clocks: 82*c66ec88fSEmmanuel Vadot minItems: 2 83*c66ec88fSEmmanuel Vadot maxItems: 3 84*c66ec88fSEmmanuel Vadot clock-names: 85*c66ec88fSEmmanuel Vadot minItems: 2 86*c66ec88fSEmmanuel Vadot maxItems: 3 87*c66ec88fSEmmanuel Vadot items: 88*c66ec88fSEmmanuel Vadot - const: uart 89*c66ec88fSEmmanuel Vadot - pattern: '^clk_uart_baud[0-1]$' 90*c66ec88fSEmmanuel Vadot - pattern: '^clk_uart_baud[0-1]$' 91*c66ec88fSEmmanuel Vadot 92*c66ec88fSEmmanuel Vadot - if: 93*c66ec88fSEmmanuel Vadot properties: 94*c66ec88fSEmmanuel Vadot compatible: 95*c66ec88fSEmmanuel Vadot contains: 96*c66ec88fSEmmanuel Vadot enum: 97*c66ec88fSEmmanuel Vadot - samsung,exynos4210-uart 98*c66ec88fSEmmanuel Vadot then: 99*c66ec88fSEmmanuel Vadot properties: 100*c66ec88fSEmmanuel Vadot clocks: 101*c66ec88fSEmmanuel Vadot minItems: 2 102*c66ec88fSEmmanuel Vadot maxItems: 2 103*c66ec88fSEmmanuel Vadot clock-names: 104*c66ec88fSEmmanuel Vadot minItems: 2 105*c66ec88fSEmmanuel Vadot maxItems: 2 106*c66ec88fSEmmanuel Vadot items: 107*c66ec88fSEmmanuel Vadot - const: uart 108*c66ec88fSEmmanuel Vadot - const: clk_uart_baud0 109*c66ec88fSEmmanuel Vadot 110*c66ec88fSEmmanuel Vadotexamples: 111*c66ec88fSEmmanuel Vadot - | 112*c66ec88fSEmmanuel Vadot #include <dt-bindings/clock/samsung,s3c64xx-clock.h> 113*c66ec88fSEmmanuel Vadot 114*c66ec88fSEmmanuel Vadot uart0: serial@7f005000 { 115*c66ec88fSEmmanuel Vadot compatible = "samsung,s3c6400-uart"; 116*c66ec88fSEmmanuel Vadot reg = <0x7f005000 0x100>; 117*c66ec88fSEmmanuel Vadot interrupt-parent = <&vic1>; 118*c66ec88fSEmmanuel Vadot interrupts = <5>; 119*c66ec88fSEmmanuel Vadot clock-names = "uart", "clk_uart_baud2", 120*c66ec88fSEmmanuel Vadot "clk_uart_baud3"; 121*c66ec88fSEmmanuel Vadot clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>, 122*c66ec88fSEmmanuel Vadot <&clocks SCLK_UART>; 123*c66ec88fSEmmanuel Vadot samsung,uart-fifosize = <16>; 124*c66ec88fSEmmanuel Vadot }; 125