From 5c8a521d447682037221535bd898a9d182d25c7d Mon Sep 17 00:00:00 2001 From: Matt Porter Date: Thu, 26 Feb 2015 10:38:45 -0500 Subject: Documentation: DT: omap_serial: document missing properties and add an example The omap_serial.txt binding documentation lacks a number of properties that are used in DTS files for platforms incorporating this peripheral. Fix this by documenting the missing required and optional fields and add an example. Signed-off-by: Matt Porter Signed-off-by: Tony Lindgren --- .../devicetree/bindings/serial/omap_serial.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'Documentation/devicetree/bindings/serial') diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt index 342eedd10050..54c2a155c783 100644 --- a/Documentation/devicetree/bindings/serial/omap_serial.txt +++ b/Documentation/devicetree/bindings/serial/omap_serial.txt @@ -4,7 +4,27 @@ 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 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>; + }; -- cgit v1.2.3-59-g8ed1b