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143 lines
5.1 KiB
143 lines
5.1 KiB
From 4f4509e88313b05862de58f529712bc20a164871 Mon Sep 17 00:00:00 2001
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From: Michael Heimpold <mhei@heimpold.de>
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Date: Thu, 28 Apr 2016 22:06:15 +0200
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Subject: [PATCH] net: ethernet: enc28j60: add device tree support
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(Upstream commit 2dd355a007e44960ec049c75920ddb6778fec9ee)
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The following patch adds the required match table for device tree support
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(and while at, fix the indent). It's also possible to specify the
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MAC address in the DT blob.
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Also add the corresponding binding documentation file.
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Signed-off-by: Michael Heimpold <mhei@heimpold.de>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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.../devicetree/bindings/net/microchip,enc28j60.txt | 59 ++++++++++++++++++++++
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drivers/net/ethernet/microchip/enc28j60.c | 21 +++++---
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2 files changed, 73 insertions(+), 7 deletions(-)
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create mode 100644 Documentation/devicetree/bindings/net/microchip,enc28j60.txt
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/net/microchip,enc28j60.txt
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@@ -0,0 +1,59 @@
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+* Microchip ENC28J60
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+
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+This is a standalone 10 MBit ethernet controller with SPI interface.
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+
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+For each device connected to a SPI bus, define a child node within
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+the SPI master node.
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+
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+Required properties:
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+- compatible: Should be "microchip,enc28j60"
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+- reg: Specify the SPI chip select the ENC28J60 is wired to
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+- interrupt-parent: Specify the phandle of the source interrupt, see interrupt
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+ binding documentation for details. Usually this is the GPIO bank
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+ the interrupt line is wired to.
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+- interrupts: Specify the interrupt index within the interrupt controller (referred
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+ to above in interrupt-parent) and interrupt type. The ENC28J60 natively
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+ generates falling edge interrupts, however, additional board logic
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+ might invert the signal.
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+- pinctrl-names: List of assigned state names, see pinctrl binding documentation.
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+- pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line,
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+ see also generic and your platform specific pinctrl binding
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+ documentation.
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+
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+Optional properties:
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+- spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60.
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+ According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however,
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+ board designs may need to limit this value.
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+- local-mac-address: See ethernet.txt in the same directory.
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+
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+
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+Example (for NXP i.MX28 with pin control stuff for GPIO irq):
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+
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+ ssp2: ssp@80014000 {
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+ compatible = "fsl,imx28-spi";
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>;
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+ status = "okay";
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+
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+ enc28j60: ethernet@0 {
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+ compatible = "microchip,enc28j60";
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&enc28j60_pins>;
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+ reg = <0>;
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+ interrupt-parent = <&gpio3>;
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+ interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
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+ spi-max-frequency = <12000000>;
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+ };
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+ };
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+
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+ pinctrl@80018000 {
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+ enc28j60_pins: enc28j60_pins@0 {
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+ reg = <0>;
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+ fsl,pinmux-ids = <
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+ MX28_PAD_AUART0_RTS__GPIO_3_3 /* Interrupt */
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+ >;
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+ fsl,drive-strength = <MXS_DRIVE_4mA>;
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+ fsl,voltage = <MXS_VOLTAGE_HIGH>;
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+ fsl,pull-up = <MXS_PULL_DISABLE>;
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+ };
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+ };
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--- a/drivers/net/ethernet/microchip/enc28j60.c
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+++ b/drivers/net/ethernet/microchip/enc28j60.c
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@@ -28,11 +28,12 @@
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#include <linux/skbuff.h>
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#include <linux/delay.h>
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#include <linux/spi/spi.h>
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+#include <linux/of_net.h>
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#include "enc28j60_hw.h"
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#define DRV_NAME "enc28j60"
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-#define DRV_VERSION "1.01"
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+#define DRV_VERSION "1.02"
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#define SPI_OPLEN 1
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@@ -1544,6 +1545,7 @@ static int enc28j60_probe(struct spi_dev
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{
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struct net_device *dev;
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struct enc28j60_net *priv;
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+ const void *macaddr;
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int ret = 0;
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if (netif_msg_drv(&debug))
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@@ -1575,7 +1577,12 @@ static int enc28j60_probe(struct spi_dev
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ret = -EIO;
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goto error_irq;
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}
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- eth_hw_addr_random(dev);
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+
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+ macaddr = of_get_mac_address(spi->dev.of_node);
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+ if (macaddr)
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+ ether_addr_copy(dev->dev_addr, macaddr);
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+ else
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+ eth_hw_addr_random(dev);
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enc28j60_set_hw_macaddr(dev);
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/* Board setup must set the relevant edge trigger type;
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@@ -1630,16 +1637,16 @@ static int enc28j60_remove(struct spi_de
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return 0;
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}
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-static const struct of_device_id enc28j60_of_match[] = {
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- { .compatible = "microchip,enc28j60", },
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+static const struct of_device_id enc28j60_dt_ids[] = {
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+ { .compatible = "microchip,enc28j60" },
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{ /* sentinel */ }
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};
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-MODULE_DEVICE_TABLE(of, enc28j60_of_match);
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+MODULE_DEVICE_TABLE(of, enc28j60_dt_ids);
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static struct spi_driver enc28j60_driver = {
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.driver = {
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- .name = DRV_NAME,
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- .of_match_table = enc28j60_of_match,
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+ .name = DRV_NAME,
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+ .of_match_table = enc28j60_dt_ids,
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},
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.probe = enc28j60_probe,
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.remove = enc28j60_remove,
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