diff options
Diffstat (limited to 'Documentation/devicetree')
5 files changed, 94 insertions, 10 deletions
diff --git a/Documentation/devicetree/bindings/serial/arm,mps2-uart.txt b/Documentation/devicetree/bindings/serial/arm,mps2-uart.txt new file mode 100644 index 000000000000..128cc6aed001 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/arm,mps2-uart.txt @@ -0,0 +1,19 @@ +ARM MPS2 UART + +Required properties: +- compatible : Should be "arm,mps2-uart" +- reg : Address and length of the register set +- interrupts : Reference to the UART RX, TX and overrun interrupts + +Required clocking property: +- clocks : The input clock of the UART + + +Examples: + +uart0: serial@40004000 { + compatible = "arm,mps2-uart"; + reg = <0x40004000 0x1000>; + interrupts = <0 1 12>; + clocks = <&sysclk>; +}; diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt index ed94c217c98d..1e82802d8e32 100644 --- a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt +++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt @@ -6,7 +6,7 @@ Required properties: - interrupts : Should contain uart interrupt Optional properties: -- fsl,uart-has-rtscts : Indicate the uart has rts and cts +- uart-has-rtscts : Indicate the uart has rts and cts - fsl,irda-mode : Indicate the uart supports irda mode - fsl,dte-mode : Indicate the uart works in DTE mode. The uart works in DCE mode by default. @@ -24,6 +24,6 @@ uart1: serial@73fbc000 { compatible = "fsl,imx51-uart", "fsl,imx21-uart"; reg = <0x73fbc000 0x4000>; interrupts = <31>; - fsl,uart-has-rtscts; + uart-has-rtscts; fsl,dte-mode; }; diff --git a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt index 7c408c87e613..5c96d41899f1 100644 --- a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt +++ b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt @@ -1,8 +1,10 @@ * Freescale MXS Application UART (AUART) -Required properties: -- compatible : Should be "fsl,<soc>-auart". The supported SoCs include - imx23 and imx28. +Required properties for all SoCs: +- compatible : Should be one of fallowing variants: + "fsl,imx23-auart" - Freescale i.MX23 + "fsl,imx28-auart" - Freescale i.MX28 + "alphascale,asm9260-auart" - Alphascale ASM9260 - reg : Address and length of the register set for the device - interrupts : Should contain the auart interrupt numbers - dmas: DMA specifier, consisting of a phandle to DMA controller node @@ -10,8 +12,14 @@ Required properties: Refer to dma.txt and fsl-mxs-dma.txt for details. - dma-names: "rx" for RX channel, "tx" for TX channel. +Required properties for "alphascale,asm9260-auart": +- clocks : the clocks feeding the watchdog timer. See clock-bindings.txt +- clock-names : should be set to + "mod" - source for tick counter. + "ahb" - ahb gate. + Optional properties: -- fsl,uart-has-rtscts : Indicate the UART has RTS and CTS lines +- uart-has-rtscts : Indicate the UART has RTS and CTS lines for hardware flow control, it also means you enable the DMA support for this UART. - {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD diff --git a/Documentation/devicetree/bindings/serial/serial.txt b/Documentation/devicetree/bindings/serial/serial.txt new file mode 100644 index 000000000000..fd970f76a7b8 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/serial.txt @@ -0,0 +1,57 @@ +Generic Serial DT Bindings + +This document lists a set of generic properties for describing UARTs in a +device tree. Whether these properties apply to a particular device depends on +the DT bindings for the actual device. + +Optional properties: + - cts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be + used as the UART's CTS line. + - dcd-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be + used as the UART's DCD line. + - dsr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be + used as the UART's DSR line. + - dtr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be + used as the UART's DTR line. + - rng-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be + used as the UART's RNG line. + - rts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be + used as the UART's RTS line. + + - uart-has-rtscts: The presence of this property indicates that the + UART has dedicated lines for RTS/CTS hardware flow control, and that + they are available for use (wired and enabled by pinmux configuration). + This depends on both the UART hardware and the board wiring. + Note that this property is mutually-exclusive with "cts-gpios" and + "rts-gpios" above. + + +Examples: + + uart1: serial@48022000 { + compatible = "ti,am3352-uart", "ti,omap3-uart"; + ti,hwmods = "uart2"; + clock-frequency = <48000000>; + reg = <0x48022000 0x2000>; + interrupts = <73>; + dmas = <&edma 28 0>, <&edma 29 0>; + dma-names = "tx", "rx"; + dtr-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>; + dsr-gpios = <&gpio2 23 GPIO_ACTIVE_LOW>; + dcd-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>; + rng-gpios = <&gpio2 25 GPIO_ACTIVE_LOW>; + cts-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>; + rts-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>; + status = "okay"; + }; + + scifa4: serial@e6c80000 { + compatible = "renesas,scifa-sh73a0", "renesas,scifa"; + reg = <0xe6c80000 0x100>; + interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp2_clks SH73A0_CLK_SCIFA4>; + clock-names = "fck"; + power-domains = <&pd_a3sp>; + uart-has-rtscts; + status = "okay"; + }; diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt index 67e2a0aeb042..1e48bbbeecc6 100644 --- a/Documentation/devicetree/bindings/serial/sirf-uart.txt +++ b/Documentation/devicetree/bindings/serial/sirf-uart.txt @@ -9,9 +9,9 @@ Required properties: - clocks : Should contain uart clock number Optional properties: -- sirf,uart-has-rtscts: we have hardware flow controller pins in hardware -- rts-gpios: RTS pin for USP-based UART if sirf,uart-has-rtscts is true -- cts-gpios: CTS pin for USP-based UART if sirf,uart-has-rtscts is true +- uart-has-rtscts: we have hardware flow controller pins in hardware +- rts-gpios: RTS pin for USP-based UART if uart-has-rtscts is true +- cts-gpios: CTS pin for USP-based UART if uart-has-rtscts is true Example: @@ -28,7 +28,7 @@ On the board-specific dts, we can put rts-gpios and cts-gpios like usp@b0090000 { compatible = "sirf,prima2-usp-uart"; - sirf,uart-has-rtscts; + uart-has-rtscts; rts-gpios = <&gpio 15 0>; cts-gpios = <&gpio 46 0>; }; |