Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livep...
[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / net / microchip,enc28j60.txt
1 * Microchip ENC28J60
2
3 This is a standalone 10 MBit ethernet controller with SPI interface.
4
5 For each device connected to a SPI bus, define a child node within
6 the SPI master node.
7
8 Required 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
23 Optional 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
30 Example (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
37                 enc28j60: ethernet@0 {
38                         compatible = "microchip,enc28j60";
39                         pinctrl-names = "default";
40                         pinctrl-0 = <&enc28j60_pins>;
41                         reg = <0>;
42                         interrupt-parent = <&gpio3>;
43                         interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
44                         spi-max-frequency = <12000000>;
45                 };
46         };
47
48         pinctrl@80018000 {
49                 enc28j60_pins: enc28j60_pins@0 {
50                         reg = <0>;
51                         fsl,pinmux-ids = <
52                                 MX28_PAD_AUART0_RTS__GPIO_3_3    /* Interrupt */
53                         >;
54                         fsl,drive-strength = <MXS_DRIVE_4mA>;
55                         fsl,voltage = <MXS_VOLTAGE_HIGH>;
56                         fsl,pull-up = <MXS_PULL_DISABLE>;
57                 };
58         };