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Diffstat (limited to 'Documentation/devicetree/bindings/serial/samsung_uart.txt')
-rw-r--r-- | Documentation/devicetree/bindings/serial/samsung_uart.txt | 56 |
1 files changed, 50 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.txt b/Documentation/devicetree/bindings/serial/samsung_uart.txt index 2c8a17c..e85f37e 100644 --- a/Documentation/devicetree/bindings/serial/samsung_uart.txt +++ b/Documentation/devicetree/bindings/serial/samsung_uart.txt @@ -1,14 +1,58 @@ * Samsung's UART Controller -The Samsung's UART controller is used for interfacing SoC with serial communicaion -devices. +The Samsung's UART controller is used for interfacing SoC with serial +communicaion devices. Required properties: -- compatible: should be - - "samsung,exynos4210-uart", for UART's compatible with Exynos4210 uart ports. +- compatible: should be one of following: + - "samsung,exynos4210-uart" - Exynos4210 SoC, + - "samsung,s3c2410-uart" - compatible with ports present on S3C2410 SoC, + - "samsung,s3c2412-uart" - compatible with ports present on S3C2412 SoC, + - "samsung,s3c2440-uart" - compatible with ports present on S3C2440 SoC, + - "samsung,s3c6400-uart" - compatible with ports present on S3C6400 SoC, + - "samsung,s5pv210-uart" - compatible with ports present on S5PV210 SoC. - reg: base physical address of the controller and length of memory mapped region. -- interrupts: interrupt number to the cpu. The interrupt specifier format depends - on the interrupt controller parent. +- interrupts: a single interrupt signal to SoC interrupt controller, + according to interrupt bindings documentation [1]. + +- clock-names: input names of clocks used by the controller: + - "uart" - controller bus clock, + - "clk_uart_baudN" - Nth baud base clock input (N = 0, 1, ...), + according to SoC User's Manual (only N = 0 is allowedfor SoCs without + internal baud clock mux). +- clocks: phandles and specifiers for all clocks specified in "clock-names" + property, in the same order, according to clock bindings documentation [2]. + +[1] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt +[2] Documentation/devicetree/bindings/clock/clock-bindings.txt + +Optional properties: +- samsung,uart-fifosize: The fifo size supported by the UART channel + +Note: 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. + +Example: + aliases { + serial0 = &uart0; + serial1 = &uart1; + serial2 = &uart2; + }; + +Example: + uart1: serial@7f005400 { + compatible = "samsung,s3c6400-uart"; + reg = <0x7f005400 0x100>; + interrupt-parent = <&vic1>; + interrupts = <6>; + clock-names = "uart", "clk_uart_baud2", + "clk_uart_baud3"; + clocks = <&clocks PCLK_UART1>, <&clocks PCLK_UART1>, + <&clocks SCLK_UART>; + samsung,uart-fifosize = <16>; + }; |