| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | - interrupts: Specify the interrupt index within the interrupt controller (referred |
| 12 | to above in interrupt-parent) and interrupt type. The ENC28J60 natively |
| 13 | generates falling edge interrupts, however, additional board logic |
| 14 | might invert the signal. |
| 15 | - pinctrl-names: List of assigned state names, see pinctrl binding documentation. |
| 16 | - pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line, |
| 17 | see also generic and your platform specific pinctrl binding |
| 18 | documentation. |
| 19 | |
| 20 | Optional properties: |
| 21 | - spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60. |
| 22 | According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however, |
| 23 | board designs may need to limit this value. |
| 24 | |
| 25 | The MAC address will be determined using the optional properties |
| 26 | defined in ethernet.txt. |
| 27 | |
| 28 | Example (for NXP i.MX28 with pin control stuff for GPIO irq): |
| 29 | |
| 30 | ssp2: ssp@80014000 { |
| 31 | compatible = "fsl,imx28-spi"; |
| 32 | pinctrl-names = "default"; |
| 33 | pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>; |
| 34 | |
| 35 | enc28j60: ethernet@0 { |
| 36 | compatible = "microchip,enc28j60"; |
| 37 | pinctrl-names = "default"; |
| 38 | pinctrl-0 = <&enc28j60_pins>; |
| 39 | reg = <0>; |
| 40 | interrupt-parent = <&gpio3>; |
| 41 | interrupts = <3 IRQ_TYPE_EDGE_FALLING>; |
| 42 | spi-max-frequency = <12000000>; |
| 43 | }; |
| 44 | }; |
| 45 | |
| 46 | pinctrl@80018000 { |
| 47 | enc28j60_pins: enc28j60_pins@0 { |
| 48 | reg = <0>; |
| 49 | fsl,pinmux-ids = < |
| 50 | MX28_PAD_AUART0_RTS__GPIO_3_3 /* Interrupt */ |
| 51 | >; |
| 52 | fsl,drive-strength = <MXS_DRIVE_4mA>; |
| 53 | fsl,voltage = <MXS_VOLTAGE_HIGH>; |
| 54 | fsl,pull-up = <MXS_PULL_DISABLE>; |
| 55 | }; |
| 56 | }; |