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48147b9768
Add devicetree binding for SPI devices. Signed-off-by: Andrew Duggan <aduggan@synaptics.com> Acked-by: Rob Herring <robh@kernel.org> Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
Synaptics RMI4 SPI Device Binding
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The Synaptics RMI4 core is able to support RMI4 devices using different
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transports and different functions. This file describes the device tree
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bindings for devices using the SPI transport driver. Complete documentation
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for other transports and functions can be found in
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Documentation/devicetree/bindings/input/rmi4.
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Required Properties:
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- compatible: syna,rmi4-spi
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- reg: Chip select address for the device
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- #address-cells: Set to 1 to indicate that the function child nodes
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consist of only on uint32 value.
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- #size-cells: Set to 0 to indicate that the function child nodes do not
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have a size property.
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Optional Properties:
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- interrupts: interrupt which the rmi device is connected to.
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- interrupt-parent: The interrupt controller.
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See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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- spi-rx-delay-us: microsecond delay after a read transfer.
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- spi-tx-delay-us: microsecond delay after a write transfer.
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Function Parameters:
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Parameters specific to RMI functions are contained in child nodes of the rmi device
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node. Documentation for the parameters of each function can be found in:
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Documentation/devicetree/bindings/input/rmi4/rmi_f*.txt.
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Example:
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spi@7000d800 {
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rmi4-spi-dev@0 {
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compatible = "syna,rmi4-spi";
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reg = <0x0>;
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#address-cells = <1>;
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#size-cells = <0>;
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spi-max-frequency = <4000000>;
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spi-cpha;
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spi-cpol;
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interrupt-parent = <&gpio>;
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interrupts = <TEGRA_GPIO(K, 2) 0x2>;
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spi-rx-delay-us = <30>;
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rmi4-f01@1 {
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reg = <0x1>;
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syna,nosleep-mode = <1>;
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};
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rmi4-f11@11 {
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reg = <0x11>;
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touchscreen-inverted-y;
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syna,sensor-type = <2>;
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};
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};
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};
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