tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1* STMicroelectronics SAS. ST21NFCA NFC Controller
2
3Required properties:
4- compatible: Should be "st,st21nfca-i2c".
5- clock-frequency: I²C work frequency.
6- reg: address on the bus
7- interrupt-parent: phandle for the interrupt gpio controller
8- interrupts: GPIO interrupt to which the chip is connected
9- enable-gpios: Output GPIO pin used for enabling/disabling the ST21NFCA
10
11Optional SoC Specific Properties:
12- pinctrl-names: Contains only one value - "default".
13- pintctrl-0: Specifies the pin control groups used for this controller.
14- ese-present: Specifies that an ese is physically connected to the nfc
15controller.
16- uicc-present: Specifies that the uicc swp signal can be physically
17connected to the nfc controller.
18
19Example (for ARM-based BeagleBoard xM with ST21NFCA on I2C2):
20
21&i2c2 {
22
23 status = "okay";
24
25 st21nfca: st21nfca@1 {
26
27 compatible = "st,st21nfca-i2c";
28
29 reg = <0x01>;
30 clock-frequency = <400000>;
31
32 interrupt-parent = <&gpio5>;
33 interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
34
35 enable-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
36
37 ese-present;
38 uicc-present;
39 };
40};