xref: /freebsd/sys/contrib/device-tree/Bindings/net/nfc/st-nci-spi.txt (revision 2e3507c25e42292b45a5482e116d278f5515d04d) 
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