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dt/bindings: Add a serial/UART attached device binding
Add a common binding for describing serial/UART attached devices. Common examples are Bluetooth, WiFi, NFC and GPS devices. Serial attached devices are represented as child nodes of a UART node. This may need to be extended for more complex devices with multiple interfaces, but for the simple cases a child node is sufficient. Tested-By: Sebastian Reichel <sre@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Documentation/devicetree/bindings/serial/slave-device.txt
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Documentation/devicetree/bindings/serial/slave-device.txt
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Serial Slave Device DT binding
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This documents the binding structure and common properties for serial
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attached devices. Common examples include Bluetooth, WiFi, NFC and GPS
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devices.
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Serial attached devices shall be a child node of the host UART device the
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slave device is attached to. It is expected that the attached device is
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the only child node of the UART device. The slave device node name shall
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reflect the generic type of device for the node.
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Required Properties:
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- compatible : A string reflecting the vendor and specific device the node
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represents.
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Optional Properties:
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- max-speed : The maximum baud rate the device operates at. This should
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only be present if the maximum is less than the slave device
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can support. For example, a particular board has some signal
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quality issue or the host processor can't support higher
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baud rates.
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Example:
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serial@1234 {
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compatible = "ns16550a";
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interrupts = <1>;
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bluetooth {
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compatible = "brcm,bcm43341-bt";
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interrupt-parent = <&gpio>;
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interrupts = <10>;
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};
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};
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