mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2024-10-20 14:38:20 +02:00
8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
218 lines
6.1 KiB
Diff
218 lines
6.1 KiB
Diff
From 0f49536b413a81aedb9635c7b2613ca5a8d554c4 Mon Sep 17 00:00:00 2001
|
|
From: menschel <menschel.p@posteo.de>
|
|
Date: Wed, 30 Dec 2020 21:55:34 +0100
|
|
Subject: [PATCH] Add overlay for Seeed Studio CAN BUS FD HAT (#4034)
|
|
|
|
This patch adds the overlay for the Seeed Studio CAN BUS FD HAT
|
|
with two CAN FD Channels and an RTC.
|
|
https://www.seeedstudio.com/CAN-BUS-FD-HAT-for-Raspberry-Pi-p-4742.html
|
|
|
|
The overlay was generated by
|
|
ovmerge -c mcp251xfd-overlay.dts,spi0-0,interrupt=25 \
|
|
mcp251xfd-overlay.dts,spi0-1,interrupt=24 \
|
|
i2c-rtc-overlay.dts,pcf85063
|
|
|
|
|
|
Also, add description on how to generate overlays
|
|
|
|
Signed-off-by: Patrick Menschel <menschel.p@posteo.de>
|
|
---
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
|
arch/arm/boot/dts/overlays/README | 46 +++++++
|
|
.../dts/overlays/seeed-can-fd-hat-overlay.dts | 117 ++++++++++++++++++
|
|
3 files changed, 164 insertions(+)
|
|
create mode 100644 arch/arm/boot/dts/overlays/seeed-can-fd-hat-overlay.dts
|
|
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
|
@@ -161,6 +161,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
|
|
sc16is752-spi1.dtbo \
|
|
sdhost.dtbo \
|
|
sdio.dtbo \
|
|
+ seeed-can-fd-hat.dtbo \
|
|
sh1106-spi.dtbo \
|
|
smi.dtbo \
|
|
smi-dev.dtbo \
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -81,6 +81,44 @@ Parameters usually have default values,
|
|
mandatory. See the list of overlays below for a description of the parameters
|
|
and their defaults.
|
|
|
|
+Making new Overlays based on existing Overlays
|
|
+==============================================
|
|
+
|
|
+Recent overlays have been designed in a more general way, so that they can be
|
|
+adapted to hardware by changing their parameters. When you have additional
|
|
+hardware with more than one device of a kind, you end up using the same overlay
|
|
+multiple times with other parameters, e.g.
|
|
+
|
|
+ # 2 CAN FD interfaces on spi but with different pins
|
|
+ dtoverlay=mcp251xfd,spi0-0,interrupt=25
|
|
+ dtoverlay=mcp251xfd,spi0-1,interrupt=24
|
|
+
|
|
+ # a realtime clock on i2c
|
|
+ dtoverlay=i2c-rtc,pcf85063
|
|
+
|
|
+While this approach does work, it requires knowledge about the hardware design.
|
|
+It is more feasible to simplify things for the end user by providing a single
|
|
+overlay as it is done the traditional way.
|
|
+
|
|
+A new overlay can be generated by using ovmerge utility.
|
|
+https://github.com/raspberrypi/utils/blob/master/ovmerge/ovmerge
|
|
+
|
|
+To generate an overlay for the above configuration we pass the configuration
|
|
+to ovmerge and add the -c flag.
|
|
+
|
|
+ ovmerge -c mcp251xfd-overlay.dts,spi0-0,interrupt=25 \
|
|
+ mcp251xfd-overlay.dts,spi0-1,interrupt=24 \
|
|
+ i2c-rtc-overlay.dts,pcf85063 \
|
|
+ >> merged-overlay.dts
|
|
+
|
|
+The -c option writes the command above as a comment into the overlay as
|
|
+a marker that this overlay is generated and how it was generated.
|
|
+After compiling the overlay it can be loaded in a single line.
|
|
+
|
|
+ dtoverlay=merged
|
|
+
|
|
+It does the same as the original configuration but without parameters.
|
|
+
|
|
The Overlay and Parameter Reference
|
|
===================================
|
|
|
|
@@ -2466,6 +2504,14 @@ Info: This overlay is now deprecated.
|
|
Load: <Deprecated>
|
|
|
|
|
|
+Name: seeed-can-fd-hat
|
|
+Info: Overlay for Seeed Studio CAN BUS FD HAT with two CAN FD channels and an
|
|
+ RTC.
|
|
+ https://www.seeedstudio.com/CAN-BUS-FD-HAT-for-Raspberry-Pi-p-4742.html
|
|
+Load: dtoverlay=seeed-can-fd-hat
|
|
+Params: <None>
|
|
+
|
|
+
|
|
Name: sh1106-spi
|
|
Info: Overlay for SH1106 OLED via SPI using fbtft staging driver.
|
|
Load: dtoverlay=sh1106-spi,<param>=<val>
|
|
--- /dev/null
|
|
+++ b/arch/arm/boot/dts/overlays/seeed-can-fd-hat-overlay.dts
|
|
@@ -0,0 +1,117 @@
|
|
+// redo: ovmerge -c mcp251xfd-overlay.dts,spi0-0,interrupt=25 mcp251xfd-overlay.dts,spi0-1,interrupt=24 i2c-rtc-overlay.dts,pcf85063
|
|
+
|
|
+// Device tree overlay for https://www.seeedstudio.com/CAN-BUS-FD-HAT-for-Raspberry-Pi-p-4742.html
|
|
+
|
|
+/dts-v1/;
|
|
+/plugin/;
|
|
+
|
|
+#include <dt-bindings/gpio/gpio.h>
|
|
+#include <dt-bindings/interrupt-controller/irq.h>
|
|
+#include <dt-bindings/pinctrl/bcm2835.h>
|
|
+
|
|
+/ {
|
|
+ compatible = "brcm,bcm2835";
|
|
+ fragment@0 {
|
|
+ target = <&spidev0>;
|
|
+ __overlay__ {
|
|
+ status = "disabled";
|
|
+ };
|
|
+ };
|
|
+ fragment@1 {
|
|
+ target = <&gpio>;
|
|
+ __overlay__ {
|
|
+ mcp251xfd_pins: mcp251xfd_spi0_0_pins {
|
|
+ brcm,pins = <25>;
|
|
+ brcm,function = <BCM2835_FSEL_GPIO_IN>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@2 {
|
|
+ target-path = "/clocks";
|
|
+ __overlay__ {
|
|
+ clk_mcp251xfd_osc: mcp251xfd-spi0-0-osc {
|
|
+ #clock-cells = <0>;
|
|
+ compatible = "fixed-clock";
|
|
+ clock-frequency = <40000000>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@3 {
|
|
+ target = <&spi0>;
|
|
+ __overlay__ {
|
|
+ status = "okay";
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ mcp251xfd@0 {
|
|
+ compatible = "microchip,mcp251xfd";
|
|
+ reg = <0>;
|
|
+ pinctrl-names = "default";
|
|
+ pinctrl-0 = <&mcp251xfd_pins>;
|
|
+ spi-max-frequency = <20000000>;
|
|
+ interrupt-parent = <&gpio>;
|
|
+ interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
|
|
+ clocks = <&clk_mcp251xfd_osc>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@4 {
|
|
+ target = <&spidev1>;
|
|
+ __overlay__ {
|
|
+ status = "disabled";
|
|
+ };
|
|
+ };
|
|
+ fragment@5 {
|
|
+ target = <&gpio>;
|
|
+ __overlay__ {
|
|
+ mcp251xfd_pins_1: mcp251xfd_spi0_1_pins {
|
|
+ brcm,pins = <24>;
|
|
+ brcm,function = <BCM2835_FSEL_GPIO_IN>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@6 {
|
|
+ target-path = "/clocks";
|
|
+ __overlay__ {
|
|
+ clk_mcp251xfd_osc_1: mcp251xfd-spi0-1-osc {
|
|
+ #clock-cells = <0>;
|
|
+ compatible = "fixed-clock";
|
|
+ clock-frequency = <40000000>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@7 {
|
|
+ target = <&spi0>;
|
|
+ __overlay__ {
|
|
+ status = "okay";
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ mcp251xfd@1 {
|
|
+ compatible = "microchip,mcp251xfd";
|
|
+ reg = <1>;
|
|
+ pinctrl-names = "default";
|
|
+ pinctrl-0 = <&mcp251xfd_pins_1>;
|
|
+ spi-max-frequency = <20000000>;
|
|
+ interrupt-parent = <&gpio>;
|
|
+ interrupts = <24 IRQ_TYPE_LEVEL_LOW>;
|
|
+ clocks = <&clk_mcp251xfd_osc_1>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@8 {
|
|
+ target = <&i2cbus>;
|
|
+ __overlay__ {
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ pcf85063@51 {
|
|
+ compatible = "nxp,pcf85063";
|
|
+ reg = <0x51>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ fragment@9 {
|
|
+ target = <&i2c_arm>;
|
|
+ i2cbus: __overlay__ {
|
|
+ status = "okay";
|
|
+ };
|
|
+ };
|
|
+};
|