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- interrupt-parent: phandle for the interrupt gpio controller 7- interrupts: GPIO interrupt to which the chip is connected 8- reset-gpios: Output GPIO pin used to reset the ST21NFCB 9 10Optional SoC Specific Properties: 11- pinctrl-names: Contains only one value - "default". 12- pintctrl-0: Specifies the pin control groups used for this controller. 13- ese-present: Specifies that an ese is physically connected to the nfc 14controller. 15- uicc-present: Specifies that the uicc swp signal can be physically 16connected to the nfc controller. 17 18Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4): 19 20&mcspi4 { 21 22 status = "okay"; 23 24 st21nfcb: st21nfcb@0 { 25 26 compatible = "st,st21nfcb-spi"; 27 28 clock-frequency = <4000000>; 29 30 interrupt-parent = <&gpio5>; 31 interrupts = <2 IRQ_TYPE_EDGE_RISING>; 32 33 reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; 34 35 ese-present; 36 uicc-present; 37 }; 38}; 39