This patch adds ST NFC binding doc that guides how to make SPI slave node entry of ST NFC transceiver in DT file of any platform.
Signed-off-by: Shikha Singh <[email protected]> --- .../devicetree/bindings/net/nfc/stnfc.txt | 50 ++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/nfc/stnfc.txt diff --git a/Documentation/devicetree/bindings/net/nfc/stnfc.txt b/Documentation/devicetree/bindings/net/nfc/stnfc.txt new file mode 100644 index 0000000..b050b3e --- /dev/null +++ b/Documentation/devicetree/bindings/net/nfc/stnfc.txt @@ -0,0 +1,50 @@ +* STMicroelectronics : NFC Transceiver + +ST NFC Transceiver can be attached with SPI bus. +ST NFC node should be defined in DT as SPI slave device of SPI +master with which transceiver is physically connected. +The properties defined below are required to be the part of DT +to include ST NFC transceiver over SPI into the platform. + +Required properties: +=================== +- reg: Address of SPI slave "ST NFC transceiver" on SPI master bus. + +- compatible: should be "st,stnfc" for ST NFC transceiver + +- spi-max-frequency: Max. operating SPI frequency for ST NFC + transceiver. + +- enable-gpio: GPIO line to enable ST NFC transceiver. + +- interrupt-parent : Standard way to specify the controller to which + transceiver's interrupt is routed. + +- interrupts : Standard way to define ST NFC transceiver's out + interrupt. + +Optional property: +================= +- nfcstvin : This is an optional property. It contains a + phandle to ST NFC transceiver's regulator supply node in DT. + +Example: +======= +spi@9840000 { + reg = <0x9840000 0x110>; + #address-cells = <1>; + #size-cells = <0>; + cs-gpios = <&pio0 4>; + status = "okay"; + + stnfc@0{ + reg = <0>; + compatible = "st,stnfc"; + status = "okay"; + spi-max-frequency = <1000000>; + enable-gpio = <&pio4 0>; + interrupt-parent = <&pio0>; + interrupts = <7 IRQ_TYPE_EDGE_FALLING>; + }; + +}; -- 1.8.2.1
