tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* Microchip ENC28J60
2
3This is a standalone 10 MBit ethernet controller with SPI interface.
4
5For each device connected to a SPI bus, define a child node within
6the SPI master node.
7
8Required properties:
9- compatible: Should be "microchip,enc28j60"
10- reg: Specify the SPI chip select the ENC28J60 is wired to
11- interrupt-parent: Specify the phandle of the source interrupt, see interrupt
12 binding documentation for details. Usually this is the GPIO bank
13 the interrupt line is wired to.
14- interrupts: Specify the interrupt index within the interrupt controller (referred
15 to above in interrupt-parent) and interrupt type. The ENC28J60 natively
16 generates falling edge interrupts, however, additional board logic
17 might invert the signal.
18- pinctrl-names: List of assigned state names, see pinctrl binding documentation.
19- pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line,
20 see also generic and your platform specific pinctrl binding
21 documentation.
22
23Optional properties:
24- spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60.
25 According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however,
26 board designs may need to limit this value.
27- local-mac-address: See ethernet.txt in the same directory.
28
29
30Example (for NXP i.MX28 with pin control stuff for GPIO irq):
31
32 ssp2: ssp@80014000 {
33 compatible = "fsl,imx28-spi";
34 pinctrl-names = "default";
35 pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>;
36 status = "okay";
37
38 enc28j60: ethernet@0 {
39 compatible = "microchip,enc28j60";
40 pinctrl-names = "default";
41 pinctrl-0 = <&enc28j60_pins>;
42 reg = <0>;
43 interrupt-parent = <&gpio3>;
44 interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
45 spi-max-frequency = <12000000>;
46 };
47 };
48
49 pinctrl@80018000 {
50 enc28j60_pins: enc28j60_pins@0 {
51 reg = <0>;
52 fsl,pinmux-ids = <
53 MX28_PAD_AUART0_RTS__GPIO_3_3 /* Interrupt */
54 >;
55 fsl,drive-strength = <MXS_DRIVE_4mA>;
56 fsl,voltage = <MXS_VOLTAGE_HIGH>;
57 fsl,pull-up = <MXS_PULL_DISABLE>;
58 };
59 };