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openwrt/target/linux/bcm27xx/patches-5.10/950-0385-mcp251xfd-add-over...

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From 6a028ad5aed9e68280c9ccf6d4ca5370fcfdb4a2 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Fri, 15 Nov 2019 00:54:07 +0100
Subject: [PATCH] mcp251xfd: add overlay
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 22 ++
.../boot/dts/overlays/mcp251xfd-overlay.dts | 226 ++++++++++++++++++
3 files changed, 249 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/mcp251xfd-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -108,6 +108,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
mcp23s17.dtbo \
mcp2515-can0.dtbo \
mcp2515-can1.dtbo \
+ mcp251xfd.dtbo \
mcp3008.dtbo \
mcp3202.dtbo \
mcp342x.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1779,6 +1779,28 @@ Params: oscillator Clock fr
interrupt GPIO for interrupt signal
+Name: mcp251xfd
+Info: Configures the MCP251XFD CAN controller family
+ For devices on spi1 or spi2, the interfaces should be enabled
+ with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
+Load: dtoverlay=mcp251xfd,<param>=<val>
+Params: spi<n>-<m> Configure device at spi<n>, cs<m>
+ (boolean, required)
+
+ oscillator Clock frequency for the CAN controller (Hz)
+
+ speed Maximum SPI frequence (Hz)
+
+ interrupt GPIO for interrupt signal
+
+ rx_interrupt GPIO for RX interrupt signal (nINT1) (optional)
+
+ xceiver_enable GPIO for CAN transceiver enable (optional)
+
+ xceiver_active_high specifiy if CAN transceiver enable pin is
+ active high (optional, default: active low)
+
+
Name: mcp3008
Info: Configures MCP3008 A/D converters
For devices on spi1 or spi2, the interfaces should be enabled
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/mcp251xfd-overlay.dts
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/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>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@1 {
+ target = <&spidev1>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@2 {
+ target-path = "spi1/spidev@0";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@3 {
+ target-path = "spi1/spidev@1";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@4 {
+ target-path = "spi1/spidev@2";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@5 {
+ target-path = "spi2/spidev@0";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@6 {
+ target-path = "spi2/spidev@1";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@7 {
+ target-path = "spi2/spidev@2";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@8 {
+ target = <&gpio>;
+ __overlay__ {
+ mcp251xfd_pins: mcp251xfd_pins {
+ brcm,pins = <25>;
+ brcm,function = <BCM2835_FSEL_GPIO_IN>;
+ };
+ };
+ };
+
+ fragment@9 {
+ target-path = "/clocks";
+ __overlay__ {
+ clk_mcp251xfd_osc: mcp251xfd-osc {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <40000000>;
+ };
+ };
+ };
+
+ mcp251xfd_frag: fragment@10 {
+ target = <&spi0>;
+ __overlay__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ mcp251xfd: 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@11 {
+ target = <&mcp251xfd>;
+ mcp251xfd_rx_int_gpios: __dormant__ {
+ microchip,rx-int-gpios = <&gpio 255 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ fragment@12 {
+ target = <&gpio>;
+ __dormant__ {
+ mcp251xfd_xceiver_pins: mcp251xfd_xceiver_pins {
+ brcm,pins = <255>;
+ brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+ };
+ };
+ };
+
+ fragment@13 {
+ target-path = "/";
+ __dormant__ {
+ reg_mcp251xfd_xceiver: reg_mcp251xfd_xceiver {
+ compatible = "regulator-fixed";
+ regulator-name = "mcp251xfd_xceiver";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ gpio = <&gpio 4 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcp251xfd_xceiver_pins>;
+ };
+ };
+ };
+
+ fragment@14 {
+ target = <&mcp251xfd>;
+ __dormant__ {
+ xceiver-supply = <&reg_mcp251xfd_xceiver>;
+ };
+ };
+
+ __overrides__ {
+ spi0-0 = <0>, "+0",
+ <&mcp251xfd_frag>, "target:0=", <&spi0>,
+ <&mcp251xfd>, "reg:0=0",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi0_0_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi0-0-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi0_0_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi0-0-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi0-0-xceiver";
+ spi0-1 = <0>, "+1",
+ <&mcp251xfd_frag>, "target:0=", <&spi0>,
+ <&mcp251xfd>, "reg:0=1",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi0_1_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi0-1-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi0_1_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi0-1-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi0-1-xceiver";
+ spi1-0 = <0>, "+2",
+ <&mcp251xfd_frag>, "target:0=", <&spi1>,
+ <&mcp251xfd>, "reg:0=0",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi1_0_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi1-0-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi1_0_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi1-0-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi1-0-xceiver";
+ spi1-1 = <0>, "+3",
+ <&mcp251xfd_frag>, "target:0=", <&spi1>,
+ <&mcp251xfd>, "reg:0=1",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi1_1_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi1-1-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi1_1_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi1-1-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi1-1-xceiver";
+ spi1-2 = <0>, "+4",
+ <&mcp251xfd_frag>, "target:0=", <&spi1>,
+ <&mcp251xfd>, "reg:0=2",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi1_2_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi1-2-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi1_2_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi1-2-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi1-2-xceiver";
+ spi2-0 = <0>, "+5",
+ <&mcp251xfd_frag>, "target:0=", <&spi2>,
+ <&mcp251xfd>, "reg:0=0",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi2_0_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi2-0-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi2_0_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi2-0-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi2-0-xceiver";
+ spi2-1 = <0>, "+6",
+ <&mcp251xfd_frag>, "target:0=", <&spi2>,
+ <&mcp251xfd>, "reg:0=1",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi2_1_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi2-1-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi2_1_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi2-1-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi2-1-xceiver";
+ spi2-2 = <0>, "+7",
+ <&mcp251xfd_frag>, "target:0=", <&spi2>,
+ <&mcp251xfd>, "reg:0=2",
+ <&mcp251xfd_pins>, "name=mcp251xfd_spi2_2_pins",
+ <&clk_mcp251xfd_osc>, "name=mcp251xfd-spi2-2-osc",
+ <&mcp251xfd_xceiver_pins>, "name=mcp251xfd_spi2_2_xceiver_pins",
+ <&reg_mcp251xfd_xceiver>, "name=reg-mcp251xfd-spi2-2-xceiver",
+ <&reg_mcp251xfd_xceiver>, "regulator-name=mcp251xfd-spi2-2-xceiver";
+ oscillator = <&clk_mcp251xfd_osc>, "clock-frequency:0";
+ speed = <&mcp251xfd>, "spi-max-frequency:0";
+ interrupt = <&mcp251xfd_pins>, "brcm,pins:0",
+ <&mcp251xfd>, "interrupts:0";
+ rx_interrupt = <0>, "+11",
+ <&mcp251xfd_pins>, "brcm,pins:4",
+ <&mcp251xfd_rx_int_gpios>, "microchip,rx-int-gpios:4";
+ xceiver_enable = <0>, "+12+13+14",
+ <&mcp251xfd_xceiver_pins>, "brcm,pins:0",
+ <&reg_mcp251xfd_xceiver>, "gpio:4";
+ xceiver_active_high = <&reg_mcp251xfd_xceiver>, "enable-active-high?";
+ };
+};
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