diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0471-net-ethernet-enc28j60-add-device-tree-support.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0471-net-ethernet-enc28j60-add-device-tree-support.patch | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0471-net-ethernet-enc28j60-add-device-tree-support.patch b/target/linux/brcm2708/patches-4.4/0471-net-ethernet-enc28j60-add-device-tree-support.patch new file mode 100644 index 0000000000..eab1286fc0 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0471-net-ethernet-enc28j60-add-device-tree-support.patch @@ -0,0 +1,143 @@ +From 55d0ce46f962a768dd358ca26158c8c195988645 Mon Sep 17 00:00:00 2001 +From: Michael Heimpold <mhei@heimpold.de> +Date: Thu, 28 Apr 2016 22:06:15 +0200 +Subject: [PATCH] net: ethernet: enc28j60: add device tree support + +(Upstream commit 2dd355a007e44960ec049c75920ddb6778fec9ee) + +The following patch adds the required match table for device tree support +(and while at, fix the indent). It's also possible to specify the +MAC address in the DT blob. + +Also add the corresponding binding documentation file. + +Signed-off-by: Michael Heimpold <mhei@heimpold.de> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + .../devicetree/bindings/net/microchip,enc28j60.txt | 59 ++++++++++++++++++++++ + drivers/net/ethernet/microchip/enc28j60.c | 21 +++++--- + 2 files changed, 73 insertions(+), 7 deletions(-) + create mode 100644 Documentation/devicetree/bindings/net/microchip,enc28j60.txt + +--- /dev/null ++++ b/Documentation/devicetree/bindings/net/microchip,enc28j60.txt +@@ -0,0 +1,59 @@ ++* Microchip ENC28J60 ++ ++This is a standalone 10 MBit ethernet controller with SPI interface. ++ ++For each device connected to a SPI bus, define a child node within ++the SPI master node. ++ ++Required properties: ++- compatible: Should be "microchip,enc28j60" ++- reg: Specify the SPI chip select the ENC28J60 is wired to ++- interrupt-parent: Specify the phandle of the source interrupt, see interrupt ++ binding documentation for details. Usually this is the GPIO bank ++ the interrupt line is wired to. ++- interrupts: Specify the interrupt index within the interrupt controller (referred ++ to above in interrupt-parent) and interrupt type. The ENC28J60 natively ++ generates falling edge interrupts, however, additional board logic ++ might invert the signal. ++- pinctrl-names: List of assigned state names, see pinctrl binding documentation. ++- pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line, ++ see also generic and your platform specific pinctrl binding ++ documentation. ++ ++Optional properties: ++- spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60. ++ According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however, ++ board designs may need to limit this value. ++- local-mac-address: See ethernet.txt in the same directory. ++ ++ ++Example (for NXP i.MX28 with pin control stuff for GPIO irq): ++ ++ ssp2: ssp@80014000 { ++ compatible = "fsl,imx28-spi"; ++ pinctrl-names = "default"; ++ pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>; ++ status = "okay"; ++ ++ enc28j60: ethernet@0 { ++ compatible = "microchip,enc28j60"; ++ pinctrl-names = "default"; ++ pinctrl-0 = <&enc28j60_pins>; ++ reg = <0>; ++ interrupt-parent = <&gpio3>; ++ interrupts = <3 IRQ_TYPE_EDGE_FALLING>; ++ spi-max-frequency = <12000000>; ++ }; ++ }; ++ ++ pinctrl@80018000 { ++ enc28j60_pins: enc28j60_pins@0 { ++ reg = <0>; ++ fsl,pinmux-ids = < ++ MX28_PAD_AUART0_RTS__GPIO_3_3 /* Interrupt */ ++ >; ++ fsl,drive-strength = <MXS_DRIVE_4mA>; ++ fsl,voltage = <MXS_VOLTAGE_HIGH>; ++ fsl,pull-up = <MXS_PULL_DISABLE>; ++ }; ++ }; +--- a/drivers/net/ethernet/microchip/enc28j60.c ++++ b/drivers/net/ethernet/microchip/enc28j60.c +@@ -28,11 +28,12 @@ + #include <linux/skbuff.h> + #include <linux/delay.h> + #include <linux/spi/spi.h> ++#include <linux/of_net.h> + + #include "enc28j60_hw.h" + + #define DRV_NAME "enc28j60" +-#define DRV_VERSION "1.01" ++#define DRV_VERSION "1.02" + + #define SPI_OPLEN 1 + +@@ -1544,6 +1545,7 @@ static int enc28j60_probe(struct spi_dev + { + struct net_device *dev; + struct enc28j60_net *priv; ++ const void *macaddr; + int ret = 0; + + if (netif_msg_drv(&debug)) +@@ -1575,7 +1577,12 @@ static int enc28j60_probe(struct spi_dev + ret = -EIO; + goto error_irq; + } +- eth_hw_addr_random(dev); ++ ++ macaddr = of_get_mac_address(spi->dev.of_node); ++ if (macaddr) ++ ether_addr_copy(dev->dev_addr, macaddr); ++ else ++ eth_hw_addr_random(dev); + enc28j60_set_hw_macaddr(dev); + + /* Board setup must set the relevant edge trigger type; +@@ -1630,16 +1637,16 @@ static int enc28j60_remove(struct spi_de + return 0; + } + +-static const struct of_device_id enc28j60_of_match[] = { +- { .compatible = "microchip,enc28j60", }, ++static const struct of_device_id enc28j60_dt_ids[] = { ++ { .compatible = "microchip,enc28j60" }, + { /* sentinel */ } + }; +-MODULE_DEVICE_TABLE(of, enc28j60_of_match); ++MODULE_DEVICE_TABLE(of, enc28j60_dt_ids); + + static struct spi_driver enc28j60_driver = { + .driver = { +- .name = DRV_NAME, +- .of_match_table = enc28j60_of_match, ++ .name = DRV_NAME, ++ .of_match_table = enc28j60_dt_ids, + }, + .probe = enc28j60_probe, + .remove = enc28j60_remove, |