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Diffstat (limited to 'Documentation/devicetree/bindings/serial/8250.txt')
-rw-r--r-- | Documentation/devicetree/bindings/serial/8250.txt | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/Documentation/devicetree/bindings/serial/8250.txt b/Documentation/devicetree/bindings/serial/8250.txt deleted file mode 100644 index 55700f20f6ee..000000000000 --- a/Documentation/devicetree/bindings/serial/8250.txt +++ /dev/null @@ -1,100 +0,0 @@ -* 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" - - For MediaTek BTIF, must contain '"mediatek,<chip>-btif", - "mediatek,mtk-btif"' where <chip> is mt7622, mt7623. - - "altr,16550-FIFO32" - - "altr,16550-FIFO64" - - "altr,16550-FIFO128" - - "fsl,16550-FIFO64" - - "fsl,ns16550" - - "intel,xscale-uart" - - "ti,da830-uart" - - "aspeed,ast2400-vuart" - - "aspeed,ast2500-vuart" - - "nuvoton,npcm750-uart" - - "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. -- tx-threshold: Specify the TX FIFO low water indication for parts with - programmable TX FIFO thresholds. -- resets : phandle + reset specifier pairs -- overrun-throttle-ms : how long to pause uart rx when input overrun is encountered. -- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD - line respectively. It will use specified GPIO instead of the peripheral - function pin for the UART feature. If unsure, don't specify this property. -- aspeed,sirq-polarity-sense: Only applicable to aspeed,ast2500-vuart. - phandle to aspeed,ast2500-scu compatible syscon alongside register offset - and bit number to identify how the SIRQ polarity should be configured. - One possible data source is the LPC/eSPI mode bit. - Example: aspeed,sirq-polarity-sense = <&syscon 0x70 25> - -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>; - }; - -Example for OMAP UART using GPIO-based modem control signals: - - uart4: serial@49042000 { - compatible = "ti,omap3-uart"; - reg = <0x49042000 0x400>; - interrupts = <80>; - ti,hwmods = "uart4"; - clock-frequency = <48000000>; - cts-gpios = <&gpio3 5 GPIO_ACTIVE_LOW>; - rts-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>; - dtr-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>; - dsr-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>; - dcd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>; - rng-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>; - }; |