diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-1035-Add-overlay-for-Seeed-Studio-CAN-BUS-FD-HAT-4034.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-1035-Add-overlay-for-Seeed-Studio-CAN-BUS-FD-HAT-4034.patch | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-1035-Add-overlay-for-Seeed-Studio-CAN-BUS-FD-HAT-4034.patch b/target/linux/bcm27xx/patches-5.4/950-1035-Add-overlay-for-Seeed-Studio-CAN-BUS-FD-HAT-4034.patch deleted file mode 100644 index a5bbbdd4e6..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-1035-Add-overlay-for-Seeed-Studio-CAN-BUS-FD-HAT-4034.patch +++ /dev/null @@ -1,217 +0,0 @@ -From 4a314a9b9d91cacbf6be9dd521cf3abd3ae8bcef 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 -@@ -159,6 +159,7 @@ 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 - =================================== - -@@ -2422,6 +2460,14 @@ 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"; -+ }; -+ }; -+}; |