1*4882a593Smuzhiyun* STMicroelectronics SAS. ST21NFCA NFC Controller 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired properties: 4*4882a593Smuzhiyun- compatible: Should be "st,st21nfca-i2c". 5*4882a593Smuzhiyun- clock-frequency: I²C work frequency. 6*4882a593Smuzhiyun- reg: address on the bus 7*4882a593Smuzhiyun- enable-gpios: Output GPIO pin used for enabling/disabling the ST21NFCA 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunOptional SoC Specific Properties: 10*4882a593Smuzhiyun- pinctrl-names: Contains only one value - "default". 11*4882a593Smuzhiyun- pintctrl-0: Specifies the pin control groups used for this controller. 12*4882a593Smuzhiyun- ese-present: Specifies that an ese is physically connected to the nfc 13*4882a593Smuzhiyuncontroller. 14*4882a593Smuzhiyun- uicc-present: Specifies that the uicc swp signal can be physically 15*4882a593Smuzhiyunconnected to the nfc controller. 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunExample (for ARM-based BeagleBoard xM with ST21NFCA on I2C2): 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun&i2c2 { 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun st21nfca: st21nfca@1 { 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun compatible = "st,st21nfca-i2c"; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun reg = <0x01>; 27*4882a593Smuzhiyun clock-frequency = <400000>; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun interrupt-parent = <&gpio5>; 30*4882a593Smuzhiyun interrupts = <2 IRQ_TYPE_LEVEL_LOW>; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun enable-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun ese-present; 35*4882a593Smuzhiyun uicc-present; 36*4882a593Smuzhiyun }; 37*4882a593Smuzhiyun}; 38