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20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
207 lines
5.4 KiB
Diff
207 lines
5.4 KiB
Diff
From 637535797f538a24a0ce2225185b24b14aa20d51 Mon Sep 17 00:00:00 2001
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From: GabyPCgeeK <GabyPCgeeK@users.noreply.github.com>
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Date: Mon, 27 Sep 2021 04:43:21 -0400
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Subject: [PATCH] overlays: Add generic mcp2515 overlay
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Can configure mcp2515 on spi0/1/2 without the need for multiple overlays.
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 15 ++
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.../arm/boot/dts/overlays/mcp2515-overlay.dts | 156 ++++++++++++++++++
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3 files changed, 172 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/mcp2515-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -113,6 +113,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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mbed-dac.dtbo \
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mcp23017.dtbo \
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mcp23s17.dtbo \
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+ mcp2515.dtbo \
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mcp2515-can0.dtbo \
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mcp2515-can1.dtbo \
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mcp251xfd.dtbo \
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1977,6 +1977,21 @@ Params: s08-spi<n>-<m>-present 4-bit in
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or INTB output of MCP23S17 is connected.
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+Name: mcp2515
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+Info: Configures the MCP2515 CAN controller on spi0/1/2
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+ For devices on spi1 or spi2, the interfaces should be enabled
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+ with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
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+Load: dtoverlay=mcp2515,<param>=<val>
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+Params: spi<n>-<m> Configure device at spi<n>, cs<m>
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+ (boolean, required)
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+
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+ oscillator Clock frequency for the CAN controller (Hz)
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+
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+ speed Maximum SPI frequence (Hz)
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+
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+ interrupt GPIO for interrupt signal
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+
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+
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Name: mcp2515-can0
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Info: Configures the MCP2515 CAN controller on spi0.0
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Load: dtoverlay=mcp2515-can0,<param>=<val>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/mcp2515-overlay.dts
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@@ -0,0 +1,156 @@
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+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
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+
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+/dts-v1/;
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+/plugin/;
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+
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+#include <dt-bindings/gpio/gpio.h>
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+#include <dt-bindings/interrupt-controller/irq.h>
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+#include <dt-bindings/pinctrl/bcm2835.h>
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+
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+/ {
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+ compatible = "brcm,bcm2835";
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+
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+ fragment@0 {
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+ target = <&spidev0>;
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&spidev1>;
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target-path = "spi1/spidev@0";
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target-path = "spi1/spidev@1";
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@4 {
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+ target-path = "spi1/spidev@2";
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@5 {
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+ target-path = "spi2/spidev@0";
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@6 {
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+ target-path = "spi2/spidev@1";
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@7 {
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+ target-path = "spi2/spidev@2";
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+ __dormant__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@8 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ mcp2515_pins: mcp2515_pins {
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+ brcm,pins = <25>;
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+ brcm,function = <BCM2835_FSEL_GPIO_IN>;
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+ };
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+ };
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+ };
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+
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+ fragment@9 {
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+ target-path = "/clocks";
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+ __overlay__ {
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+ clk_mcp2515_osc: mcp2515-osc {
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+ #clock-cells = <0>;
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+ compatible = "fixed-clock";
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+ clock-frequency = <16000000>;
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+ };
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+ };
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+ };
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+
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+ mcp2515_frag: fragment@10 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ status = "okay";
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ mcp2515: mcp2515@0 {
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+ compatible = "microchip,mcp2515";
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+ reg = <0>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&mcp2515_pins>;
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+ spi-max-frequency = <10000000>;
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+ interrupt-parent = <&gpio>;
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+ interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
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+ clocks = <&clk_mcp2515_osc>;
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+ };
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+ };
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+ };
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+
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+ __overrides__ {
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+ spi0-0 = <0>, "+0",
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+ <&mcp2515_frag>, "target:0=", <&spi0>,
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+ <&mcp2515>, "reg:0=0",
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+ <&mcp2515_pins>, "name=mcp2515_spi0_0_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi0-0-osc";
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+ spi0-1 = <0>, "+1",
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+ <&mcp2515_frag>, "target:0=", <&spi0>,
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+ <&mcp2515>, "reg:0=1",
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+ <&mcp2515_pins>, "name=mcp2515_spi0_1_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi0-1-osc";
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+ spi1-0 = <0>, "+2",
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+ <&mcp2515_frag>, "target:0=", <&spi1>,
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+ <&mcp2515>, "reg:0=0",
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+ <&mcp2515_pins>, "name=mcp2515_spi1_0_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi1-0-osc";
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+ spi1-1 = <0>, "+3",
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+ <&mcp2515_frag>, "target:0=", <&spi1>,
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+ <&mcp2515>, "reg:0=1",
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+ <&mcp2515_pins>, "name=mcp2515_spi1_1_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi1-1-osc";
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+ spi1-2 = <0>, "+4",
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+ <&mcp2515_frag>, "target:0=", <&spi1>,
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+ <&mcp2515>, "reg:0=2",
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+ <&mcp2515_pins>, "name=mcp2515_spi1_2_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi1-2-osc";
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+ spi2-0 = <0>, "+5",
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+ <&mcp2515_frag>, "target:0=", <&spi2>,
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+ <&mcp2515>, "reg:0=0",
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+ <&mcp2515_pins>, "name=mcp2515_spi2_0_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi2-0-osc";
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+ spi2-1 = <0>, "+6",
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+ <&mcp2515_frag>, "target:0=", <&spi2>,
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+ <&mcp2515>, "reg:0=1",
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+ <&mcp2515_pins>, "name=mcp2515_spi2_1_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi2-1-osc";
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+ spi2-2 = <0>, "+7",
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+ <&mcp2515_frag>, "target:0=", <&spi2>,
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+ <&mcp2515>, "reg:0=2",
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+ <&mcp2515_pins>, "name=mcp2515_spi2_2_pins",
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+ <&clk_mcp2515_osc>, "name=mcp2515-spi2-2-osc";
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+ oscillator = <&clk_mcp2515_osc>, "clock-frequency:0";
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+ speed = <&mcp2515>, "spi-max-frequency:0";
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+ interrupt = <&mcp2515_pins>, "brcm,pins:0",
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+ <&mcp2515>, "interrupts:0";
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+ };
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+};
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