* STMicroelectronics SAS. ST NCI NFC Controller Required properties: - compatible: Should be "st,st21nfcb-spi" - spi-max-frequency: Maximum SPI frequency (<= 4000000). - interrupts: GPIO interrupt to which the chip is connected - reset-gpios: Output GPIO pin used to reset the ST21NFCB Optional SoC Specific Properties: - pinctrl-names: Contains only one value - "default". - pintctrl-0: Specifies the pin control groups used for this controller. - ese-present: Specifies that an ese is physically connected to the nfc controller. - uicc-present: Specifies that the uicc swp signal can be physically connected to the nfc controller. Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4): &mcspi4 { st21nfcb: st21nfcb@0 { compatible = "st,st21nfcb-spi"; clock-frequency = <4000000>; interrupt-parent = <&gpio5>; interrupts = <2 IRQ_TYPE_EDGE_RISING>; reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; ese-present; uicc-present; }; };