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Diffstat (limited to 'Documentation/devicetree/bindings/serial')
36 files changed, 1205 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/8250.txt b/Documentation/devicetree/bindings/serial/8250.txt new file mode 100644 index 000000000..91d5ab0e6 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/8250.txt @@ -0,0 +1,66 @@ +* UART (Universal Asynchronous Receiver/Transmitter) + +Required properties: +- compatible : one of: + - "ns8250" + - "ns16450" + - "ns16550a" + - "ns16550" + - "ns16750" + - "ns16850" + - For Tegra20, must contain "nvidia,tegra20-uart" + - For other Tegra, must contain '"nvidia,<chip>-uart", + "nvidia,tegra20-uart"' where <chip> is tegra30, tegra114, tegra124, + tegra132, or tegra210. + - "nxp,lpc3220-uart" + - "ralink,rt2880-uart" + - "ibm,qpace-nwp-serial" + - "altr,16550-FIFO32" + - "altr,16550-FIFO64" + - "altr,16550-FIFO128" + - "fsl,16550-FIFO64" + - "fsl,ns16550" + - "serial" if the port type is unknown. +- reg : offset and length of the register set for the device. +- interrupts : should contain uart interrupt. +- clock-frequency : the input clock frequency for the UART + or + clocks phandle to refer to the clk used as per Documentation/devicetree + /bindings/clock/clock-bindings.txt + +Optional properties: +- current-speed : the current active speed of the UART. +- reg-offset : offset to apply to the mapbase from the start of the registers. +- reg-shift : quantity to shift the register offsets by. +- reg-io-width : the size (in bytes) of the IO accesses that should be + performed on the device. There are some systems that require 32-bit + accesses to the UART (e.g. TI davinci). +- used-by-rtas : set to indicate that the port is in use by the OpenFirmware + RTAS and should not be registered. +- no-loopback-test: set to indicate that the port does not implements loopback + test mode +- fifo-size: the fifo size of the UART. +- auto-flow-control: one way to enable automatic flow control support. The + driver is allowed to detect support for the capability even without this + property. + +Note: +* fsl,ns16550: + ------------ + Freescale DUART is very similar to the PC16552D (and to a + pair of NS16550A), albeit with some nonstandard behavior such as + erratum A-004737 (relating to incorrect BRK handling). + + Represents a single port that is compatible with the DUART found + on many Freescale chips (examples include mpc8349, mpc8548, + mpc8641d, p4080 and ls2085a). + +Example: + + uart@80230000 { + compatible = "ns8250"; + reg = <0x80230000 0x100>; + clock-frequency = <3686400>; + interrupts = <10>; + reg-shift = <2>; + }; diff --git a/Documentation/devicetree/bindings/serial/altera_jtaguart.txt b/Documentation/devicetree/bindings/serial/altera_jtaguart.txt new file mode 100644 index 000000000..55a901051 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/altera_jtaguart.txt @@ -0,0 +1,5 @@ +Altera JTAG UART + +Required properties: +- compatible : should be "ALTR,juart-1.0" <DEPRECATED> +- compatible : should be "altr,juart-1.0" diff --git a/Documentation/devicetree/bindings/serial/altera_uart.txt b/Documentation/devicetree/bindings/serial/altera_uart.txt new file mode 100644 index 000000000..81bf7ffb1 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/altera_uart.txt @@ -0,0 +1,8 @@ +Altera UART + +Required properties: +- compatible : should be "ALTR,uart-1.0" <DEPRECATED> +- compatible : should be "altr,uart-1.0" + +Optional properties: +- clock-frequency : frequency of the clock input to the UART diff --git a/Documentation/devicetree/bindings/serial/arc-uart.txt b/Documentation/devicetree/bindings/serial/arc-uart.txt new file mode 100644 index 000000000..5cae2eb68 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/arc-uart.txt @@ -0,0 +1,26 @@ +* Synopsys ARC UART : Non standard UART used in some of the ARC FPGA boards + +Required properties: +- compatible : "snps,arc-uart" +- reg : offset and length of the register set for the device. +- interrupts : device interrupt +- clock-frequency : the input clock frequency for the UART +- current-speed : baud rate for UART + +e.g. + +arcuart0: serial@c0fc1000 { + compatible = "snps,arc-uart"; + reg = <0xc0fc1000 0x100>; + interrupts = <5>; + clock-frequency = <80000000>; + current-speed = <115200>; + status = "okay"; +}; + +Note: Each port should have an alias correctly numbered in "aliases" node. + +e.g. +aliases { + serial0 = &arcuart0; +}; diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt new file mode 100644 index 000000000..90787aa2e --- /dev/null +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt @@ -0,0 +1,60 @@ +* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART) + +Required properties: +- compatible: Should be "atmel,<chip>-usart" or "atmel,<chip>-dbgu" + The compatible <chip> indicated will be the first SoC to support an + additional mode or an USART new feature. + For the dbgu UART, use "atmel,<chip>-dbgu", "atmel,<chip>-usart" +- reg: Should contain registers location and length +- interrupts: Should contain interrupt +- clock-names: tuple listing input clock names. + Required elements: "usart" +- clocks: phandles to input clocks. + +Optional properties: +- atmel,use-dma-rx: use of PDC or DMA for receiving data +- atmel,use-dma-tx: use of PDC or DMA for transmitting data +- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD line respectively. + It will use specified PIO instead of the peripheral function pin for the USART feature. + If unsure, don't specify this property. +- add dma bindings for dma transfer: + - dmas: DMA specifier, consisting of a phandle to DMA controller node, + memory peripheral interface and USART DMA channel ID, FIFO configuration. + Refer to dma.txt and atmel-dma.txt for details. + - dma-names: "rx" for RX channel, "tx" for TX channel. + +<chip> compatible description: +- at91rm9200: legacy USART support +- at91sam9260: generic USART implementation for SAM9 SoCs + +Example: +- use PDC: + usart0: serial@fff8c000 { + compatible = "atmel,at91sam9260-usart"; + reg = <0xfff8c000 0x4000>; + interrupts = <7>; + clocks = <&usart0_clk>; + clock-names = "usart"; + atmel,use-dma-rx; + atmel,use-dma-tx; + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; + cts-gpios = <&pioD 16 GPIO_ACTIVE_LOW>; + dtr-gpios = <&pioD 17 GPIO_ACTIVE_LOW>; + dsr-gpios = <&pioD 18 GPIO_ACTIVE_LOW>; + dcd-gpios = <&pioD 20 GPIO_ACTIVE_LOW>; + rng-gpios = <&pioD 19 GPIO_ACTIVE_LOW>; + }; + +- use DMA: + usart0: serial@f001c000 { + compatible = "atmel,at91sam9260-usart"; + reg = <0xf001c000 0x100>; + interrupts = <12 4 5>; + clocks = <&usart0_clk>; + clock-names = "usart"; + atmel,use-dma-rx; + atmel,use-dma-tx; + dmas = <&dma0 2 0x3>, + <&dma0 2 0x204>; + dma-names = "tx", "rx"; + }; diff --git a/Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt b/Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt new file mode 100644 index 000000000..ebcbb62c0 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt @@ -0,0 +1,19 @@ +ETRAX FS UART + +Required properties: +- compatible : "axis,etraxfs-uart" +- reg: offset and length of the register set for the device. +- interrupts: device interrupt + +Optional properties: +- {dtr,dsr,ri,cd}-gpios: specify a GPIO for DTR/DSR/RI/CD + line respectively. + +Example: + +serial@b00260000 { + compatible = "axis,etraxfs-uart"; + reg = <0xb0026000 0x1000>; + interrupts = <68>; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm6345-uart.txt b/Documentation/devicetree/bindings/serial/brcm,bcm6345-uart.txt new file mode 100644 index 000000000..5c52e5eef --- /dev/null +++ b/Documentation/devicetree/bindings/serial/brcm,bcm6345-uart.txt @@ -0,0 +1,30 @@ +* BCM63xx UART + +Required properties: + +- compatible: "brcm,bcm6345-uart" + +- reg: The base address of the UART register bank. + +- interrupts: A single interrupt specifier. + +- clocks: Clock driving the hardware; used to figure out the baud rate + divisor. + +Example: + + uart0: serial@14e00520 { + compatible = "brcm,bcm6345-uart"; + reg = <0x14e00520 0x18>; + interrupt-parent = <&periph_intc>; + interrupts = <2>; + clocks = <&periph_clk>; + }; + + clocks { + periph_clk: periph_clk@0 { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <54000000>; + }; + }; diff --git a/Documentation/devicetree/bindings/serial/cavium-uart.txt b/Documentation/devicetree/bindings/serial/cavium-uart.txt new file mode 100644 index 000000000..87a6c375c --- /dev/null +++ b/Documentation/devicetree/bindings/serial/cavium-uart.txt @@ -0,0 +1,19 @@ +* Universal Asynchronous Receiver/Transmitter (UART) + +- compatible: "cavium,octeon-3860-uart" + + Compatibility with all cn3XXX, cn5XXX and cn6XXX SOCs. + +- reg: The base address of the UART register bank. + +- interrupts: A single interrupt specifier. + +- current-speed: Optional, the current bit rate in bits per second. + +Example: + uart1: serial@1180000000c00 { + compatible = "cavium,octeon-3860-uart","ns16550"; + reg = <0x11800 0x00000c00 0x0 0x400>; + current-speed = <115200>; + interrupts = <0 35>; + }; diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.txt b/Documentation/devicetree/bindings/serial/cdns,uart.txt new file mode 100644 index 000000000..a3eb154c3 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/cdns,uart.txt @@ -0,0 +1,20 @@ +Binding for Cadence UART Controller + +Required properties: +- compatible : should be "cdns,uart-r1p8", or "xlnx,xuartps" +- reg: Should contain UART controller registers location and length. +- interrupts: Should contain UART controller interrupts. +- clocks: Must contain phandles to the UART clocks + See ../clocks/clock-bindings.txt for details. +- clock-names: Tuple to identify input clocks, must contain "uart_clk" and "pclk" + See ../clocks/clock-bindings.txt for details. + + +Example: + uart@e0000000 { + compatible = "cdns,uart-r1p8"; + clocks = <&clkc 23>, <&clkc 40>; + clock-names = "uart_clk", "pclk"; + reg = <0xE0000000 0x1000>; + interrupts = <0 27 4>; + }; diff --git a/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt b/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt new file mode 100644 index 000000000..caaeb2583 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/cirrus,clps711x-uart.txt @@ -0,0 +1,31 @@ +* Cirrus Logic CLPS711X Universal Asynchronous Receiver/Transmitter (UART) + +Required properties: +- compatible: Should be "cirrus,clps711x-uart". +- reg: Address and length of the register set for the device. +- interrupts: Should contain UART TX and RX interrupt. +- clocks: Should contain UART core clock number. +- syscon: Phandle to SYSCON node, which contain UART control bits. + +Optional properties: +- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD + line respectively. + +Note: Each UART port should have an alias correctly numbered +in "aliases" node. + +Example: + aliases { + serial0 = &uart1; + }; + + uart1: uart@80000480 { + compatible = "cirrus,clps711x-uart"; + reg = <0x80000480 0x80>; + interrupts = <12 13>; + clocks = <&clks 11>; + syscon = <&syscon1>; + cts-gpios = <&sysgpio 0 GPIO_ACTIVE_LOW>; + dsr-gpios = <&sysgpio 1 GPIO_ACTIVE_LOW>; + dcd-gpios = <&sysgpio 2 GPIO_ACTIVE_LOW>; + }; diff --git a/Documentation/devicetree/bindings/serial/digicolor-usart.txt b/Documentation/devicetree/bindings/serial/digicolor-usart.txt new file mode 100644 index 000000000..2d3ede668 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/digicolor-usart.txt @@ -0,0 +1,27 @@ +Binding for Conexant Digicolor USART + +Note: this binding is only applicable for using the USART peripheral as +UART. USART also support synchronous serial protocols like SPI and I2S. Use +the binding that matches the wiring of your system. + +Required properties: +- compatible : should be "cnxt,cx92755-usart". +- reg: Should contain USART controller registers location and length. +- interrupts: Should contain a single USART controller interrupt. +- clocks: Must contain phandles to the USART clock + See ../clocks/clock-bindings.txt for details. + +Note: Each UART port should have an alias correctly numbered +in "aliases" node. + +Example: + aliases { + serial0 = &uart0; + }; + + uart0: uart@f0000740 { + compatible = "cnxt,cx92755-usart"; + reg = <0xf0000740 0x20>; + clocks = <&main_clk>; + interrupts = <44>; + }; diff --git a/Documentation/devicetree/bindings/serial/efm32-uart.txt b/Documentation/devicetree/bindings/serial/efm32-uart.txt new file mode 100644 index 000000000..8adbab268 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/efm32-uart.txt @@ -0,0 +1,20 @@ +* Energymicro efm32 UART + +Required properties: +- compatible : Should be "energymicro,efm32-uart" +- reg : Address and length of the register set +- interrupts : Should contain uart interrupt + +Optional properties: +- energymicro,location : Decides the location of the USART I/O pins. + Allowed range : [0 .. 5] + Default: 0 + +Example: + +uart@0x4000c400 { + compatible = "energymicro,efm32-uart"; + reg = <0x4000c400 0x400>; + interrupts = <15>; + energymicro,location = <0>; +}; diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt new file mode 100644 index 000000000..35ae1fb35 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt @@ -0,0 +1,29 @@ +* Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART) + +Required properties: +- compatible : Should be "fsl,<soc>-uart" +- reg : Address and length of the register set for the device +- interrupts : Should contain uart interrupt + +Optional properties: +- fsl,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 + is DCE mode by default. + +Note: Each uart controller should have an alias correctly numbered +in "aliases" node. + +Example: + +aliases { + serial0 = &uart1; +}; + +uart1: serial@73fbc000 { + compatible = "fsl,imx51-uart", "fsl,imx21-uart"; + reg = <0x73fbc000 0x4000>; + interrupts = <31>; + fsl,uart-has-rtscts; + fsl,dte-mode; +}; diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt new file mode 100644 index 000000000..c95005efb --- /dev/null +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt @@ -0,0 +1,31 @@ +* Freescale low power universal asynchronous receiver/transmitter (lpuart) + +Required properties: +- compatible : + - "fsl,vf610-lpuart" for lpuart compatible with the one integrated + on Vybrid vf610 SoC with 8-bit register organization + - "fsl,ls1021a-lpuart" for lpuart compatible with the one integrated + on LS1021A SoC with 32-bit big-endian register organization +- reg : Address and length of the register set for the device +- interrupts : Should contain uart interrupt +- clocks : phandle + clock specifier pairs, one for each entry in clock-names +- clock-names : should contain: "ipg" - the uart clock + +Optional properties: +- dmas: A list of two dma specifiers, one for each entry in dma-names. +- dma-names: should contain "tx" and "rx". + +Note: Optional properties for DMA support. Write them both or both not. + +Example: + +uart0: serial@40027000 { + compatible = "fsl,vf610-lpuart"; + reg = <0x40027000 0x1000>; + interrupts = <0 61 0x00>; + clocks = <&clks VF610_CLK_UART0>; + clock-names = "ipg"; + dmas = <&edma0 0 2>, + <&edma0 0 3>; + dma-names = "rx","tx"; + }; diff --git a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt new file mode 100644 index 000000000..7c408c87e --- /dev/null +++ b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt @@ -0,0 +1,45 @@ +* Freescale MXS Application UART (AUART) + +Required properties: +- compatible : Should be "fsl,<soc>-auart". The supported SoCs include + imx23 and imx28. +- 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 + and AUART DMA channel ID. + Refer to dma.txt and fsl-mxs-dma.txt for details. +- dma-names: "rx" for RX channel, "tx" for TX channel. + +Optional properties: +- fsl,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 + line respectively. It will use specified PIO instead of the peripheral + function pin for the USART feature. + If unsure, don't specify this property. + +Example: +auart0: serial@8006a000 { + compatible = "fsl,imx28-auart", "fsl,imx23-auart"; + reg = <0x8006a000 0x2000>; + interrupts = <112>; + dmas = <&dma_apbx 8>, <&dma_apbx 9>; + dma-names = "rx", "tx"; + cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>; + dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>; + dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>; +}; + +Note: Each auart port should have an alias correctly numbered in "aliases" +node. + +Example: + +aliases { + serial0 = &auart0; + serial1 = &auart1; + serial2 = &auart2; + serial3 = &auart3; + serial4 = &auart4; +}; diff --git a/Documentation/devicetree/bindings/serial/lantiq_asc.txt b/Documentation/devicetree/bindings/serial/lantiq_asc.txt new file mode 100644 index 000000000..5b78591aa --- /dev/null +++ b/Documentation/devicetree/bindings/serial/lantiq_asc.txt @@ -0,0 +1,16 @@ +Lantiq SoC ASC serial controller + +Required properties: +- compatible : Should be "lantiq,asc" +- reg : Address and length of the register set for the device +- interrupts: the 3 (tx rx err) interrupt numbers. The interrupt specifier + depends on the interrupt-parent interrupt controller. + +Example: + +asc1: serial@E100C00 { + compatible = "lantiq,asc"; + reg = <0xE100C00 0x400>; + interrupt-parent = <&icu0>; + interrupts = <112 113 114>; +}; diff --git a/Documentation/devicetree/bindings/serial/maxim,max310x.txt b/Documentation/devicetree/bindings/serial/maxim,max310x.txt new file mode 100644 index 000000000..83a919c24 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/maxim,max310x.txt @@ -0,0 +1,36 @@ +* Maxim MAX310X advanced Universal Asynchronous Receiver-Transmitter (UART) + +Required properties: +- compatible: Should be one of the following: + - "maxim,max3107" for Maxim MAX3107, + - "maxim,max3108" for Maxim MAX3108, + - "maxim,max3109" for Maxim MAX3109, + - "maxim,max14830" for Maxim MAX14830. +- reg: SPI chip select number. +- interrupt-parent: The phandle for the interrupt controller that + services interrupts for this IC. +- interrupts: Specifies the interrupt source of the parent interrupt + controller. The format of the interrupt specifier depends on the + parent interrupt controller. +- clocks: phandle to the IC source clock. +- clock-names: Should be "xtal" if clock is an external crystal or + "osc" if an external clock source is used. + +Optional properties: +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells: Should be two. The first cell is the GPIO number and + the second cell is used to specify the GPIO polarity: + 0 = active high, + 1 = active low. + +Example: + max14830: max14830@0 { + compatible = "maxim,max14830"; + reg = <0>; + clocks = <&clk20m>; + clock-names = "osc"; + interrupt-parent = <&gpio3>; + interrupts = <7 IRQ_TYPE_EDGE_FALLING>; + gpio-controller; + #gpio-cells = <2>; + }; diff --git a/Documentation/devicetree/bindings/serial/mrvl,pxa-ssp.txt b/Documentation/devicetree/bindings/serial/mrvl,pxa-ssp.txt new file mode 100644 index 000000000..669b8140d --- /dev/null +++ b/Documentation/devicetree/bindings/serial/mrvl,pxa-ssp.txt @@ -0,0 +1,65 @@ +Device tree bindings for Marvell PXA SSP ports + +Required properties: + + - compatible: Must be one of + mrvl,pxa25x-ssp + mvrl,pxa25x-nssp + mrvl,pxa27x-ssp + mrvl,pxa3xx-ssp + mvrl,pxa168-ssp + mrvl,pxa910-ssp + mrvl,ce4100-ssp + mrvl,lpss-ssp + + - reg: The memory base + - dmas: Two dma phandles, one for rx, one for tx + - dma-names: Must be "rx", "tx" + + +Example for PXA3xx: + + ssp0: ssp@41000000 { + compatible = "mrvl,pxa3xx-ssp"; + reg = <0x41000000 0x40>; + ssp-id = <1>; + interrupts = <24>; + clock-names = "pxa27x-ssp.0"; + dmas = <&dma 13 + &dma 14>; + dma-names = "rx", "tx"; + }; + + ssp1: ssp@41700000 { + compatible = "mrvl,pxa3xx-ssp"; + reg = <0x41700000 0x40>; + ssp-id = <2>; + interrupts = <16>; + clock-names = "pxa27x-ssp.1"; + dmas = <&dma 15 + &dma 16>; + dma-names = "rx", "tx"; + }; + + ssp2: ssp@41900000 { + compatibl3 = "mrvl,pxa3xx-ssp"; + reg = <0x41900000 0x40>; + ssp-id = <3>; + interrupts = <0>; + clock-names = "pxa27x-ssp.2"; + dmas = <&dma 66 + &dma 67>; + dma-names = "rx", "tx"; + }; + + ssp3: ssp@41a00000 { + compatible = "mrvl,pxa3xx-ssp"; + reg = <0x41a00000 0x40>; + ssp-id = <4>; + interrupts = <13>; + clock-names = "pxa27x-ssp.3"; + dmas = <&dma 2 + &dma 3>; + dma-names = "rx", "tx"; + }; + diff --git a/Documentation/devicetree/bindings/serial/mrvl-serial.txt b/Documentation/devicetree/bindings/serial/mrvl-serial.txt new file mode 100644 index 000000000..d744340de --- /dev/null +++ b/Documentation/devicetree/bindings/serial/mrvl-serial.txt @@ -0,0 +1,4 @@ +PXA UART controller + +Required properties: +- compatible : should be "mrvl,mmp-uart" or "mrvl,pxa-uart". diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt new file mode 100644 index 000000000..44152261e --- /dev/null +++ b/Documentation/devicetree/bindings/serial/mtk-uart.txt @@ -0,0 +1,26 @@ +* Mediatek Universal Asynchronous Receiver/Transmitter (UART) + +Required properties: +- compatible should contain: + * "mediatek,mt8135-uart" for MT8135 compatible UARTS + * "mediatek,mt8127-uart" for MT8127 compatible UARTS + * "mediatek,mt8173-uart" for MT8173 compatible UARTS + * "mediatek,mt6589-uart" for MT6589 compatible UARTS + * "mediatek,mt6582-uart" for MT6582 compatible UARTS + * "mediatek,mt6577-uart" for all compatible UARTS (MT8173, MT6589, MT6582, + MT6577) + +- reg: The base address of the UART register bank. + +- interrupts: A single interrupt specifier. + +- clocks: Clock driving the hardware. + +Example: + + uart0: serial@11006000 { + compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart"; + reg = <0x11006000 0x400>; + interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>; + clocks = <&uart_clk>; + }; diff --git a/Documentation/devicetree/bindings/serial/nvidia,tegra20-hsuart.txt b/Documentation/devicetree/bindings/serial/nvidia,tegra20-hsuart.txt new file mode 100644 index 000000000..845850caf --- /dev/null +++ b/Documentation/devicetree/bindings/serial/nvidia,tegra20-hsuart.txt @@ -0,0 +1,37 @@ +NVIDIA Tegra20/Tegra30 high speed (DMA based) UART controller driver. + +Required properties: +- compatible : should be "nvidia,tegra30-hsuart", "nvidia,tegra20-hsuart". +- reg: Should contain UART controller registers location and length. +- interrupts: Should contain UART controller interrupts. +- clocks: Must contain one entry, for the module clock. + See ../clocks/clock-bindings.txt for details. +- resets : Must contain an entry for each entry in reset-names. + See ../reset/reset.txt for details. +- reset-names : Must include the following entries: + - serial +- dmas : Must contain an entry for each entry in clock-names. + See ../dma/dma.txt for details. +- dma-names : Must include the following entries: + - rx + - tx + +Optional properties: +- nvidia,enable-modem-interrupt: Enable modem interrupts. Should be enable + only if all 8 lines of UART controller are pinmuxed. + +Example: + +serial@70006000 { + compatible = "nvidia,tegra30-hsuart", "nvidia,tegra20-hsuart"; + reg = <0x70006000 0x40>; + reg-shift = <2>; + interrupts = <0 36 0x04>; + nvidia,enable-modem-interrupt; + clocks = <&tegra_car 6>; + resets = <&tegra_car 6>; + reset-names = "serial"; + dmas = <&apbdma 8>, <&apbdma 8>; + dma-names = "rx", "tx"; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt new file mode 100644 index 000000000..246c79566 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt @@ -0,0 +1,33 @@ +* NXP SC16IS7xx advanced Universal Asynchronous Receiver-Transmitter (UART) + +Required properties: +- compatible: Should be one of the following: + - "nxp,sc16is740" for NXP SC16IS740, + - "nxp,sc16is741" for NXP SC16IS741, + - "nxp,sc16is750" for NXP SC16IS750, + - "nxp,sc16is752" for NXP SC16IS752, + - "nxp,sc16is760" for NXP SC16IS760, + - "nxp,sc16is762" for NXP SC16IS762. +- reg: I2C address of the SC16IS7xx device. +- interrupt-parent: The phandle for the interrupt controller that + services interrupts for this IC. +- interrupts: Should contain the UART interrupt +- clocks: Reference to the IC source clock. + +Optional properties: +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells: Should be two. The first cell is the GPIO number and + the second cell is used to specify the GPIO polarity: + 0 = active high, + 1 = active low. + +Example: + sc16is750: sc16is750@51 { + compatible = "nxp,sc16is750"; + reg = <0x51>; + clocks = <&clk20m>; + interrupt-parent = <&gpio3>; + interrupts = <7 IRQ_TYPE_EDGE_FALLING>; + gpio-controller; + #gpio-cells = <2>; + }; diff --git a/Documentation/devicetree/bindings/serial/nxp-lpc32xx-hsuart.txt b/Documentation/devicetree/bindings/serial/nxp-lpc32xx-hsuart.txt new file mode 100644 index 000000000..0d439dfc1 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/nxp-lpc32xx-hsuart.txt @@ -0,0 +1,14 @@ +* NXP LPC32xx SoC High Speed UART + +Required properties: +- compatible: Should be "nxp,lpc3220-hsuart" +- reg: Should contain registers location and length +- interrupts: Should contain interrupt + +Example: + + uart1: serial@40014000 { + compatible = "nxp,lpc3220-hsuart"; + reg = <0x40014000 0x1000>; + interrupts = <26 0>; + }; diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt new file mode 100644 index 000000000..54c2a155c --- /dev/null +++ b/Documentation/devicetree/bindings/serial/omap_serial.txt @@ -0,0 +1,30 @@ +OMAP UART controller + +Required properties: +- compatible : should be "ti,omap2-uart" for OMAP2 controllers +- compatible : should be "ti,omap3-uart" for OMAP3 controllers +- compatible : should be "ti,omap4-uart" for OMAP4 controllers +- reg : address and length of the register space +- interrupts or interrupts-extended : Should contain the uart interrupt + specifier or both the interrupt + controller phandle and interrupt + specifier. +- ti,hwmods : Must be "uart<n>", n being the instance number (1-based) + +Optional properties: +- clock-frequency : frequency of the clock input to the UART +- dmas : DMA specifier, consisting of a phandle to the DMA controller + node and a DMA channel number. +- dma-names : "rx" for receive channel, "tx" for transmit channel. + +Example: + + uart4: serial@49042000 { + compatible = "ti,omap3-uart"; + reg = <0x49042000 0x400>; + interrupts = <80>; + dmas = <&sdma 81 &sdma 82>; + dma-names = "tx", "rx"; + ti,hwmods = "uart4"; + clock-frequency = <48000000>; + }; diff --git a/Documentation/devicetree/bindings/serial/pl011.txt b/Documentation/devicetree/bindings/serial/pl011.txt new file mode 100644 index 000000000..ba3ecb8cb --- /dev/null +++ b/Documentation/devicetree/bindings/serial/pl011.txt @@ -0,0 +1,51 @@ +* ARM AMBA Primecell PL011 serial UART + +Required properties: +- compatible: must be "arm,primecell", "arm,pl011" +- reg: exactly one register range with length 0x1000 +- interrupts: exactly one interrupt specifier + +Optional properties: +- pinctrl: + When present, must have one state named "default", + and may contain a second name named "sleep". The former + state sets up pins for ordinary operation whereas + the latter state will put the associated pins to sleep + when the UART is unused +- clocks: + When present, the first clock listed must correspond to + the clock named UARTCLK on the IP block, i.e. the clock + to the external serial line, whereas the second clock + must correspond to the PCLK clocking the internal logic + of the block. Just listing one clock (the first one) is + deprecated. +- clocks-names: + When present, the first clock listed must be named + "uartclk" and the second clock listed must be named + "apb_pclk" +- dmas: + When present, may have one or two dma channels. + The first one must be named "rx", the second one + must be named "tx". +- auto-poll: + Enables polling when using RX DMA. +- poll-rate-ms: + Rate at which poll occurs when auto-poll is set, + default 100ms. +- poll-timeout-ms: + Poll timeout when auto-poll is set, default + 3000ms. + +See also bindings/arm/primecell.txt + +Example: + +uart@80120000 { + compatible = "arm,pl011", "arm,primecell"; + reg = <0x80120000 0x1000>; + interrupts = <0 11 IRQ_TYPE_LEVEL_HIGH>; + dmas = <&dma 13 0 0x2>, <&dma 13 0 0x0>; + dma-names = "rx", "tx"; + clocks = <&foo_clk>, <&bar_clk>; + clock-names = "uartclk", "apb_pclk"; +}; diff --git a/Documentation/devicetree/bindings/serial/qca,ar9330-uart.txt b/Documentation/devicetree/bindings/serial/qca,ar9330-uart.txt new file mode 100644 index 000000000..c5e032c85 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/qca,ar9330-uart.txt @@ -0,0 +1,34 @@ +* Qualcomm Atheros AR9330 High-Speed UART + +Required properties: + +- compatible: Must be "qca,ar9330-uart" + +- reg: Specifies the physical base address of the controller and + the length of the memory mapped region. + +- interrupt-parent: The phandle for the interrupt controller that + services interrupts for this device. + +- interrupts: Specifies the interrupt source of the parent interrupt + controller. The format of the interrupt specifier depends on the + parent interrupt controller. + +Additional requirements: + + Each UART port must have an alias correctly numbered in "aliases" + node. + +Example: + + aliases { + serial0 = &uart0; + }; + + uart0: uart@18020000 { + compatible = "qca,ar9330-uart"; + reg = <0x18020000 0x14>; + + interrupt-parent = <&intc>; + interrupts = <3>; + }; diff --git a/Documentation/devicetree/bindings/serial/qcom,msm-uart.txt b/Documentation/devicetree/bindings/serial/qcom,msm-uart.txt new file mode 100644 index 000000000..ce8c90161 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/qcom,msm-uart.txt @@ -0,0 +1,25 @@ +* MSM Serial UART + +The MSM serial UART hardware is designed for low-speed use cases where a +dma-engine isn't needed. From a software perspective it's mostly compatible +with the MSM serial UARTDM except that it only supports reading and writing one +character at a time. + +Required properties: +- compatible: Should contain "qcom,msm-uart" +- reg: Should contain UART register location and length. +- interrupts: Should contain UART interrupt. +- clocks: Should contain the core clock. +- clock-names: Should be "core". + +Example: + +A uart device at 0xa9c00000 with interrupt 11. + +serial@a9c00000 { + compatible = "qcom,msm-uart"; + reg = <0xa9c00000 0x1000>; + interrupts = <11>; + clocks = <&uart_cxc>; + clock-names = "core"; +}; diff --git a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt new file mode 100644 index 000000000..a2114c217 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt @@ -0,0 +1,78 @@ +* MSM Serial UARTDM + +The MSM serial UARTDM hardware is designed for high-speed use cases where the +transmit and/or receive channels can be offloaded to a dma-engine. From a +software perspective it's mostly compatible with the MSM serial UART except +that it supports reading and writing multiple characters at a time. + +Required properties: +- compatible: Should contain at least "qcom,msm-uartdm". + A more specific property should be specified as follows depending + on the version: + "qcom,msm-uartdm-v1.1" + "qcom,msm-uartdm-v1.2" + "qcom,msm-uartdm-v1.3" + "qcom,msm-uartdm-v1.4" +- reg: Should contain UART register locations and lengths. The first + register shall specify the main control registers. An optional second + register location shall specify the GSBI control region. + "qcom,msm-uartdm-v1.3" is the only compatible value that might + need the GSBI control region. +- interrupts: Should contain UART interrupt. +- clocks: Should contain the core clock and the AHB clock. +- clock-names: Should be "core" for the core clock and "iface" for the + AHB clock. + +Optional properties: +- dmas: Should contain dma specifiers for transmit and receive channels +- dma-names: Should contain "tx" for transmit and "rx" for receive channels + +Note: Aliases may be defined to ensure the correct ordering of the UARTs. +The alias serialN will result in the UART being assigned port N. If any +serialN alias exists, then an alias must exist for each enabled UART. The +serialN aliases should be in a .dts file instead of in a .dtsi file. + +Examples: + +- A uartdm v1.4 device with dma capabilities. + + serial@f991e000 { + compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm"; + reg = <0xf991e000 0x1000>; + interrupts = <0 108 0x0>; + clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>; + clock-names = "core", "iface"; + dmas = <&dma0 0>, <&dma0 1>; + dma-names = "tx", "rx"; + }; + +- A uartdm v1.3 device without dma capabilities and part of a GSBI complex. + + serial@19c40000 { + compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm"; + reg = <0x19c40000 0x1000>, + <0x19c00000 0x1000>; + interrupts = <0 195 0x0>; + clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>; + clock-names = "core", "iface"; + }; + +- serialN alias. + + aliases { + serial0 = &uarta; + serial1 = &uartc; + serial2 = &uartb; + }; + + uarta: serial@12490000 { + status = "ok"; + }; + + uartb: serial@16340000 { + status = "ok"; + }; + + uartc: serial@1a240000 { + status = "ok"; + }; diff --git a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt new file mode 100644 index 000000000..ae73bb0e9 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt @@ -0,0 +1,59 @@ +* Renesas SH-Mobile Serial Communication Interface + +Required properties: + + - compatible: Must contain one of the following: + + - "renesas,scif-r7s72100" for R7S72100 (RZ/A1H) SCIF compatible UART. + - "renesas,scifa-r8a73a4" for R8A73A4 (R-Mobile APE6) SCIFA compatible UART. + - "renesas,scifb-r8a73a4" for R8A73A4 (R-Mobile APE6) SCIFB compatible UART. + - "renesas,scifa-r8a7740" for R8A7740 (R-Mobile A1) SCIFA compatible UART. + - "renesas,scifb-r8a7740" for R8A7740 (R-Mobile A1) SCIFB compatible UART. + - "renesas,scif-r8a7778" for R8A7778 (R-Car M1) SCIF compatible UART. + - "renesas,scif-r8a7779" for R8A7779 (R-Car H1) SCIF compatible UART. + - "renesas,scif-r8a7790" for R8A7790 (R-Car H2) SCIF compatible UART. + - "renesas,scifa-r8a7790" for R8A7790 (R-Car H2) SCIFA compatible UART. + - "renesas,scifb-r8a7790" for R8A7790 (R-Car H2) SCIFB compatible UART. + - "renesas,hscif-r8a7790" for R8A7790 (R-Car H2) HSCIF compatible UART. + - "renesas,scif-r8a7791" for R8A7791 (R-Car M2) SCIF compatible UART. + - "renesas,scifa-r8a7791" for R8A7791 (R-Car M2) SCIFA compatible UART. + - "renesas,scifb-r8a7791" for R8A7791 (R-Car M2) SCIFB compatible UART. + - "renesas,hscif-r8a7791" for R8A7791 (R-Car M2) HSCIF compatible UART. + - "renesas,scif-r8a7794" for R8A7794 (R-Car E2) SCIF compatible UART. + - "renesas,scifa-r8a7794" for R8A7794 (R-Car E2) SCIFA compatible UART. + - "renesas,scifb-r8a7794" for R8A7794 (R-Car E2) SCIFB compatible UART. + - "renesas,hscif-r8a7794" for R8A7794 (R-Car E2) HSCIF compatible UART. + - "renesas,scifa-sh73a0" for SH73A0 (SH-Mobile AG5) SCIFA compatible UART. + - "renesas,scifb-sh73a0" for SH73A0 (SH-Mobile AG5) SCIFB compatible UART. + - "renesas,scif" for generic SCIF compatible UART. + - "renesas,scifa" for generic SCIFA compatible UART. + - "renesas,scifb" for generic SCIFB compatible UART. + - "renesas,hscif" for generic HSCIF compatible UART. + + When compatible with the generic version, nodes must list the + SoC-specific version corresponding to the platform first followed by the + generic version. + + - reg: Base address and length of the I/O registers used by the UART. + - interrupts: Must contain an interrupt-specifier for the SCIx interrupt. + + - clocks: Must contain a phandle and clock-specifier pair for each entry + in clock-names. + - clock-names: Must contain "sci_ick" for the SCIx UART interface clock. + +Note: Each enabled SCIx UART should have an alias correctly numbered in the +"aliases" node. + +Example: + aliases { + serial0 = &scifa0; + }; + + scifa0: serial@e6c40000 { + compatible = "renesas,scifa-r8a7790", "renesas,scifa"; + reg = <0 0xe6c40000 0 64>; + interrupt-parent = <&gic>; + interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp2_clks R8A7790_CLK_SCIFA0>; + clock-names = "sci_ick"; + }; diff --git a/Documentation/devicetree/bindings/serial/rs485.txt b/Documentation/devicetree/bindings/serial/rs485.txt new file mode 100644 index 000000000..32b1fa1f2 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/rs485.txt @@ -0,0 +1,31 @@ +* RS485 serial communications + +The RTS signal is capable of automatically controlling line direction for +the built-in half-duplex mode. +The properties described hereafter shall be given to a half-duplex capable +UART node. + +Required properties: +- rs485-rts-delay: prop-encoded-array <a b> where: + * a is the delay between rts signal and beginning of data sent in milliseconds. + it corresponds to the delay before sending data. + * b is the delay between end of data sent and rts signal in milliseconds + it corresponds to the delay after sending data and actual release of the line. + +Optional properties: +- linux,rs485-enabled-at-boot-time: empty property telling to enable the rs485 + feature at boot time. It can be disabled later with proper ioctl. +- rs485-rx-during-tx: empty property that enables the receiving of data even + whilst sending data. + +RS485 example for Atmel USART: + usart0: serial@fff8c000 { + compatible = "atmel,at91sam9260-usart"; + reg = <0xfff8c000 0x4000>; + interrupts = <7>; + atmel,use-dma-rx; + atmel,use-dma-tx; + linux,rs485-enabled-at-boot-time; + rs485-rts-delay = <0 200>; // in milliseconds + }; + diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.txt b/Documentation/devicetree/bindings/serial/samsung_uart.txt new file mode 100644 index 000000000..e85f37ec3 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/samsung_uart.txt @@ -0,0 +1,58 @@ +* Samsung's UART Controller + +The Samsung's UART controller is used for interfacing SoC with serial +communicaion devices. + +Required properties: +- 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: 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>; + }; diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt new file mode 100644 index 000000000..f0c39261c --- /dev/null +++ b/Documentation/devicetree/bindings/serial/sirf-uart.txt @@ -0,0 +1,47 @@ +* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter * + +Required properties: +- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart", + "sirf,atlas7-uart" or "sirf,atlas7-bt-uart" which means + uart located in BT module and used for BT. +- reg : Offset and length of the register set for the device +- interrupts : Should contain uart interrupt +- fifosize : Should define hardware rx/tx fifo size +- 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 + +Example: + +uart0: uart@b0050000 { + cell-index = <0>; + compatible = "sirf,prima2-uart"; + reg = <0xb0050000 0x1000>; + interrupts = <17>; + fifosize = <128>; + clocks = <&clks 13>; +}; + +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; + rts-gpios = <&gpio 15 0>; + cts-gpios = <&gpio 46 0>; +}; + +for uart use in BT module, +uart6: uart@11000000 { + cell-index = <6>; + compatible = "sirf,atlas7-bt-uart", "sirf,atlas7-uart"; + reg = <0x11000000 0x1000>; + interrupts = <0 100 0>; + clocks = <&clks 138>, <&clks 140>, <&clks 141>; + clock-names = "uart", "general", "noc"; + fifosize = <128>; + status = "disabled"; +} diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt new file mode 100644 index 000000000..289c40ed7 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt @@ -0,0 +1,73 @@ +* Synopsys DesignWare ABP UART + +Required properties: +- compatible : "snps,dw-apb-uart" +- reg : offset and length of the register set for the device. +- interrupts : should contain uart interrupt. + +Clock handling: +The clock rate of the input clock needs to be supplied by one of +- clock-frequency : the input clock frequency for the UART. +- clocks : phandle to the input clock + +The supplying peripheral clock can also be handled, needing a second property +- clock-names: tuple listing input clock names. + Required elements: "baudclk", "apb_pclk" + +Optional properties: +- resets : phandle to the parent reset controller. +- reg-shift : quantity to shift the register offsets by. If this property is + not present then the register offsets are not shifted. +- reg-io-width : the size (in bytes) of the IO accesses that should be + performed on the device. If this property is not present then single byte + accesses are used. +- dcd-override : Override the DCD modem status signal. This signal will always + be reported as active instead of being obtained from the modem status + register. Define this if your serial port does not use this pin. +- dsr-override : Override the DTS modem status signal. This signal will always + be reported as active instead of being obtained from the modem status + register. Define this if your serial port does not use this pin. +- cts-override : Override the CTS modem status signal. This signal will always + be reported as active instead of being obtained from the modem status + register. Define this if your serial port does not use this pin. +- ri-override : Override the RI modem status signal. This signal will always be + reported as inactive instead of being obtained from the modem status register. + Define this if your serial port does not use this pin. + +Example: + + uart@80230000 { + compatible = "snps,dw-apb-uart"; + reg = <0x80230000 0x100>; + clock-frequency = <3686400>; + interrupts = <10>; + reg-shift = <2>; + reg-io-width = <4>; + dcd-override; + dsr-override; + cts-override; + ri-override; + }; + +Example with one clock: + + uart@80230000 { + compatible = "snps,dw-apb-uart"; + reg = <0x80230000 0x100>; + clocks = <&baudclk>; + interrupts = <10>; + reg-shift = <2>; + reg-io-width = <4>; + }; + +Example with two clocks: + + uart@80230000 { + compatible = "snps,dw-apb-uart"; + reg = <0x80230000 0x100>; + clocks = <&baudclk>, <&apb_pclk>; + clock-names = "baudclk", "apb_pclk"; + interrupts = <10>; + reg-shift = <2>; + reg-io-width = <4>; + }; diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt b/Documentation/devicetree/bindings/serial/sprd-uart.txt new file mode 100644 index 000000000..2aff0f22c --- /dev/null +++ b/Documentation/devicetree/bindings/serial/sprd-uart.txt @@ -0,0 +1,7 @@ +* Spreadtrum serial UART + +Required properties: +- compatible: must be "sprd,sc9836-uart" +- reg: offset and length of the register set for the device +- interrupts: exactly one interrupt specifier +- clocks: phandles to input clocks. diff --git a/Documentation/devicetree/bindings/serial/st-asc.txt b/Documentation/devicetree/bindings/serial/st-asc.txt new file mode 100644 index 000000000..75d877f59 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/st-asc.txt @@ -0,0 +1,18 @@ +*st-asc(Serial Port) + +Required properties: +- compatible : Should be "st,asc". +- reg, reg-names, interrupts, interrupt-names : Standard way to define device + resources with names. look in + Documentation/devicetree/bindings/resource-names.txt + +Optional properties: +- st,hw-flow-ctrl bool flag to enable hardware flow control. +- st,force-m1 bool flat to force asc to be in Mode-1 recommeded + for high bit rates (above 19.2K) +Example: +serial@fe440000{ + compatible = "st,asc"; + reg = <0xfe440000 0x2c>; + interrupts = <0 209 0>; +}; diff --git a/Documentation/devicetree/bindings/serial/vt8500-uart.txt b/Documentation/devicetree/bindings/serial/vt8500-uart.txt new file mode 100644 index 000000000..2b64e6107 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/vt8500-uart.txt @@ -0,0 +1,27 @@ +* VIA VT8500 and WonderMedia WM8xxx UART Controller + +Required properties: +- compatible: should be "via,vt8500-uart" (for VIA/WonderMedia chips up to and + including WM8850/WM8950), or "wm,wm8880-uart" (for WM8880 and later) + +- reg: base physical address of the controller and length of memory mapped + region. + +- interrupts: hardware interrupt number + +- clocks: shall be the input parent clock phandle for the clock. This should + be the 24Mhz reference clock. + +Aliases may be defined to ensure the correct ordering of the uarts. + +Example: + aliases { + serial0 = &uart0; + }; + + uart0: serial@d8200000 { + compatible = "via,vt8500-uart"; + reg = <0xd8200000 0x1040>; + interrupts = <32>; + clocks = <&clkuart0>; + }; |