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| author |   Matt Porter <mporter@konsulko.com> | 2015-02-26 10:38:45 -0500 |
|---|---|---|
| committer |   Tony Lindgren <tony@atomide.com> | 2015-03-16 14:59:43 -0700 |
| commit | 5c8a521d447682037221535bd898a9d182d25c7d (patch) | |
| tree | 575cd9abdc28e903592f0dccd867eb1a821391ef /Documentation/devicetree/bindings/serial | |
| parent | ARM: dts: am437x-idk: enable i2c2 (diff) | |
| download | linux-dev-5c8a521d447682037221535bd898a9d182d25c7d.tar.xz linux-dev-5c8a521d447682037221535bd898a9d182d25c7d.zip | |
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 <mporter@konsulko.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'Documentation/devicetree/bindings/serial')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/omap_serial.txt | 20 |
1 files changed, 20 insertions, 0 deletions
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>", 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>; + }; |