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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/serial/samsung_uart.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Samsung S3C, S5P, Exynos, and S5L (Apple SoC) SoC UART Controller
maintainers:
- Krzysztof Kozlowski <krzk@kernel.org>
- Greg Kroah-Hartman <gregkh@linuxfoundation.org>
description: |+
Each Samsung UART should have an alias correctly numbered in the "aliases"
node, according to serialN format, where N is the port number (non-negative
decimal integer) as specified by User's Manual of respective SoC.
properties:
compatible:
items:
- enum:
- apple,s5l-uart
- axis,artpec8-uart
- samsung,s3c2410-uart
- samsung,s3c2412-uart
- samsung,s3c2440-uart
- samsung,s3c6400-uart
- samsung,s5pv210-uart
- samsung,exynos4210-uart
- samsung,exynos5433-uart
- samsung,exynos850-uart
reg:
maxItems: 1
reg-io-width:
description: |
The size (in bytes) of the IO accesses that should be performed
on the device.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [ 1, 4 ]
clocks:
minItems: 2
maxItems: 5
clock-names:
description: N = 0 is allowed for SoCs without internal baud clock mux.
minItems: 2
items:
- const: uart
- pattern: '^clk_uart_baud[0-3]$'
- pattern: '^clk_uart_baud[0-3]$'
- pattern: '^clk_uart_baud[0-3]$'
- pattern: '^clk_uart_baud[0-3]$'
dmas:
items:
- description: DMA controller phandle and request line for RX
- description: DMA controller phandle and request line for TX
dma-names:
items:
- const: rx
- const: tx
interrupts:
description: RX interrupt and optionally TX interrupt.
minItems: 1
maxItems: 2
samsung,uart-fifosize:
description: The fifo size supported by the UART channel.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [16, 64, 256]
required:
- compatible
- clocks
- clock-names
- interrupts
- reg
unevaluatedProperties: false
allOf:
- $ref: serial.yaml#
- if:
properties:
compatible:
contains:
enum:
- samsung,s3c2410-uart
- samsung,s5pv210-uart
then:
properties:
clocks:
minItems: 2
maxItems: 3
clock-names:
minItems: 2
maxItems: 3
items:
- const: uart
- pattern: '^clk_uart_baud[0-1]$'
- pattern: '^clk_uart_baud[0-1]$'
- if:
properties:
compatible:
contains:
enum:
- apple,s5l-uart
- axis,artpec8-uart
- samsung,exynos4210-uart
- samsung,exynos5433-uart
then:
properties:
clocks:
minItems: 2
maxItems: 2
clock-names:
minItems: 2
maxItems: 2
items:
- const: uart
- const: clk_uart_baud0
examples:
- |
#include <dt-bindings/clock/samsung,s3c64xx-clock.h>
uart0: serial@7f005000 {
compatible = "samsung,s3c6400-uart";
reg = <0x7f005000 0x100>;
interrupt-parent = <&vic1>;
interrupts = <5>;
clock-names = "uart", "clk_uart_baud2",
"clk_uart_baud3";
clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>,
<&clocks SCLK_UART>;
samsung,uart-fifosize = <16>;
};
|
