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| author | Jamie Iles <jamie@jamieiles.com> | 2011-06-27 13:32:33 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-27 13:30:59 -0600 |
| commit | 61ab1a90d81b5b8a53fc221a3665715c61614fb7 (patch) | |
| tree | 34041ae7560d087cc7b239488438e0edfb41e2af /Documentation/devicetree | |
| parent | 15c3597d6ea47e8f3caf068887c4666165df63ad (diff) | |
| download | lwn-61ab1a90d81b5b8a53fc221a3665715c61614fb7.tar.gz lwn-61ab1a90d81b5b8a53fc221a3665715c61614fb7.zip | |
dt: document the of_serial bindings
The of_serial bindings can be used to register a number of serial
devices. Document this binding with all of the others.
v3: remove device-type and clarify used-by-rtas
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/tty/serial/of-serial.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt new file mode 100644 index 000000000000..35e53ae85eec --- /dev/null +++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt @@ -0,0 +1,33 @@ +* UART (Universal Asynchronous Receiver/Transmitter) + +Required properties: +- compatible : one of: + - "ns8250" + - "ns16450" + - "ns16550a" + - "ns16550" + - "ns16750" + - "ns16850" + - "nvidia,tegra250-uart" + - "ibm,qpace-nwp-serial" + - "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. + +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. +- used-by-rtas : set to indicate that the port is in use by the OpenFirmware + RTAS and should not be registered. + +Example: + + uart@80230000 { + compatible = "ns8250"; + reg = <0x80230000 0x100>; + clock-frequency = <3686400>; + interrupts = <10>; + reg-shift = <2>; + }; |