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From cb9a896a799393b3cb5947bef3c95eb5ffb44776 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Thu, 10 Oct 2019 09:08:47 +0100
Subject: [PATCH] overlays: Add w5500 overlay
Add an overlay to configure the Wiznet W5500 Ethernet controller on
SPI0. The 'cs' parameter chooses the Chip Select (default 0).
See: https://github.com/raspberrypi/linux/issues/3276
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 10 ++++
arch/arm/boot/dts/overlays/w5500-overlay.dts | 63 ++++++++++++++++++++
3 files changed, 74 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/w5500-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -183,6 +183,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
vga666.dtbo \
w1-gpio.dtbo \
w1-gpio-pullup.dtbo \
+ w5500.dtbo \
wittypi.dtbo
targets += dtbs dtbs_install
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2538,6 +2538,16 @@ Params: gpiopin GPIO for
pullup Now enabled by default (ignored)
+Name: w5500
+Info: Overlay for the Wiznet W5500 Ethernet Controller on SPI0
+Load: dtoverlay=w5500,<param>=<val>
+Params: int_pin GPIO used for INT (default 25)
+
+ speed SPI bus speed (default 30000000)
+
+ cs SPI bus Chip Select (default 0)
+
+
Name: wittypi
Info: Configures the wittypi RTC module.
Load: dtoverlay=wittypi,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/w5500-overlay.dts
@@ -0,0 +1,63 @@
+// Overlay for the Wiznet w5500 Ethernet Controller
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&spidev0>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@1 {
+ target = <&spidev1>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@2 {
+ target = <&spi0>;
+ __overlay__ {
+ /* needed to avoid dtc warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ status = "okay";
+
+ eth1: w5500@0{
+ compatible = "wiznet,w5500";
+ reg = <0>; /* CE0 */
+ pinctrl-names = "default";
+ pinctrl-0 = <ð1_pins>;
+ interrupt-parent = <&gpio>;
+ interrupts = <25 0x8>;
+ spi-max-frequency = <30000000>;
+// local-mac-address = [aa bb cc dd ee ff];
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@3 {
+ target = <&gpio>;
+ __overlay__ {
+ eth1_pins: eth1_pins {
+ brcm,pins = <25>;
+ brcm,function = <0>; /* in */
+ brcm,pull = <0>; /* none */
+ };
+ };
+ };
+
+ __overrides__ {
+ int_pin = <ð1>, "interrupts:0",
+ <ð1_pins>, "brcm,pins:0";
+ speed = <ð1>, "spi-max-frequency:0";
+ cs = <ð1>, "reg:0",
+ <0>, "!0=1";
+ };
+};
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