+++ /dev/null
-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";
-+ };
-+ };
-+};
projects / openwrt / staging / chunkeey.git / blobdiff