1* STMicroelectronics SAS. ST NCI NFC Controller 2 3Required properties: 4- compatible: Should be "st,st21nfcb-spi" 5- spi-max-frequency: Maximum SPI frequency (<= 4000000). 6- interrupts: GPIO interrupt to which the chip is connected 7- reset-gpios: Output GPIO pin used to reset the ST21NFCB 8 9Optional SoC Specific Properties: 10- pinctrl-names: Contains only one value - "default". 11- pintctrl-0: Specifies the pin control groups used for this controller. 12- ese-present: Specifies that an ese is physically connected to the nfc 13controller. 14- uicc-present: Specifies that the uicc swp signal can be physically 15connected to the nfc controller. 16 17Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4): 18 19&mcspi4 { 20 21 22 st21nfcb: st21nfcb@0 { 23 24 compatible = "st,st21nfcb-spi"; 25 26 clock-frequency = <4000000>; 27 28 interrupt-parent = <&gpio5>; 29 interrupts = <2 IRQ_TYPE_EDGE_RISING>; 30 31 reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; 32 33 ese-present; 34 uicc-present; 35 }; 36}; 37