tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* Marvell International Ltd. NCI NFC Controller
2
3Required properties:
4- compatible: Should be:
5 - "marvell,nfc-uart" or "mrvl,nfc-uart" for UART devices
6 - "marvell,nfc-i2c" for I2C devices
7 - "marvell,nfc-spi" for SPI devices
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- reset-n-io: Output GPIO pin used to reset the chip (active low).
13- hci-muxed: Specifies that the chip is muxing NCI over HCI frames.
14
15Optional UART-based chip specific properties:
16- flow-control: Specifies that the chip is using RTS/CTS.
17- break-control: Specifies that the chip needs specific break management.
18
19Optional I2C-based chip specific properties:
20- i2c-int-falling: Specifies that the chip read event shall be trigged on
21 falling edge.
22- i2c-int-rising: Specifies that the chip read event shall be trigged on
23 rising edge.
24
25Example (for ARM-based BeagleBoard Black with 88W8887 on UART5):
26
27&uart5 {
28
29 nfcmrvluart: nfcmrvluart@5 {
30 compatible = "marvell,nfc-uart";
31
32 reset-n-io = <&gpio3 16 0>;
33
34 hci-muxed;
35 flow-control;
36 }
37};
38
39
40Example (for ARM-based BeagleBoard Black with 88W8887 on I2C1):
41
42&i2c1 {
43 clock-frequency = <400000>;
44
45 nfcmrvli2c0: i2c@1 {
46 compatible = "marvell,nfc-i2c";
47
48 reg = <0x8>;
49
50 /* I2C INT configuration */
51 interrupt-parent = <&gpio3>;
52 interrupts = <21 0>;
53
54 /* I2C INT trigger configuration */
55 i2c-int-rising;
56
57 /* Reset IO */
58 reset-n-io = <&gpio3 19 0>;
59 };
60};
61
62
63Example (for ARM-based BeagleBoard Black on SPI0):
64
65&spi0 {
66
67 mrvlnfcspi0: spi@0 {
68 compatible = "marvell,nfc-spi";
69
70 reg = <0>;
71
72 /* SPI Bus configuration */
73 spi-max-frequency = <3000000>;
74 spi-cpha;
75 spi-cpol;
76
77 /* SPI INT configuration */
78 interrupt-parent = <&gpio1>;
79 interrupts = <17 0>;
80
81 /* Reset IO */
82 reset-n-io = <&gpio3 19 0>;
83 };
84};