From 104dcc1aff0ae5509ad9875c11e3e0d8c290709d Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Tue, 2 Jun 2020 17:19:51 +0100
Subject: [PATCH] ARM: dts: Add bcm2711-rpi-cm4.dts

Add initial DTS file for Compute Module 4.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 arch/arm/boot/dts/Makefile            |   3 +-
 arch/arm/boot/dts/bcm2711-rpi-cm4.dts | 586 ++++++++++++++++++++++++++
 arch/arm/boot/dts/overlays/README     |   6 +
 3 files changed, 594 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/dts/bcm2711-rpi-cm4.dts

--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -12,7 +12,8 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2710-rpi-3-b.dtb \
 	bcm2711-rpi-4-b.dtb \
 	bcm2710-rpi-3-b-plus.dtb \
-	bcm2710-rpi-cm3.dtb
+	bcm2710-rpi-cm3.dtb \
+	bcm2711-rpi-cm4.dtb
 
 dtb-$(CONFIG_ARCH_ALPINE) += \
 	alpine-db.dtb
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2711-rpi-cm4.dts
@@ -0,0 +1,586 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2711.dtsi"
+#include "bcm2835-rpi.dtsi"
+
+/ {
+	compatible = "raspberrypi,4-compute-module", "brcm,bcm2711";
+	model = "Raspberry Pi Compute Module 4";
+
+	chosen {
+		/* 8250 auxiliary UART instead of pl011 */
+		stdout-path = "serial1:115200n8";
+	};
+
+	/* Will be filled by the bootloader */
+	memory@0 {
+		device_type = "memory";
+		reg = <0 0 0>;
+	};
+
+	aliases {
+		ethernet0 = &genet;
+	};
+
+	leds {
+		act {
+			gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
+		};
+
+		pwr {
+			label = "PWR";
+			gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	wifi_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
+	};
+
+	sd_io_1v8_reg: sd_io_1v8_reg {
+		compatible = "regulator-gpio";
+		regulator-name = "vdd-sd-io";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+		regulator-settling-time-us = <5000>;
+		gpios = <&expgpio 4 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x1
+			  3300000 0x0>;
+		status = "okay";
+	};
+};
+
+&firmware {
+	expgpio: gpio {
+		compatible = "raspberrypi,firmware-gpio";
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "BT_ON",
+				  "WL_ON",
+				  "PWR_LED_OFF",
+				  "ANT1",
+				  "VDD_SD_IO_SEL",
+				  "CAM_GPIO",
+				  "SD_PWR_ON",
+				  "ANT2";
+		status = "okay";
+
+		ant1: ant1 {
+			gpio-hog;
+			gpios = <3 GPIO_ACTIVE_HIGH>;
+			output-high;
+		};
+
+		ant2: ant2 {
+			gpio-hog;
+			gpios = <7 GPIO_ACTIVE_HIGH>;
+			output-low;
+		};
+	};
+};
+
+&pwm1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm1_0_gpio40 &pwm1_1_gpio41>;
+	status = "okay";
+};
+
+/* SDHCI is used to control the SDIO for wireless */
+&sdhci {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_gpio34>;
+	bus-width = <4>;
+	non-removable;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	status = "okay";
+
+	brcmf: wifi@1 {
+		reg = <1>;
+		compatible = "brcm,bcm4329-fmac";
+	};
+};
+
+/* EMMC2 is used to drive the SD card */
+&emmc2 {
+	vqmmc-supply = <&sd_io_1v8_reg>;
+	broken-cd;
+	status = "okay";
+};
+
+&genet {
+	phy-handle = <&phy1>;
+	phy-mode = "rgmii-rxid";
+	status = "okay";
+};
+
+&genet_mdio {
+	phy1: ethernet-phy@1 {
+		/* No PHY interrupt */
+		reg = <0x1>;
+	};
+};
+
+/* uart0 communicates with the BT module */
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32>;
+	uart-has-rtscts;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		max-speed = <2000000>;
+		shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+/* uart1 is mapped to the pin header */
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_gpio14>;
+	status = "okay";
+};
+
+&vchiq {
+	interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+};
+
+&vc4 {
+	status = "okay";
+};
+
+&pixelvalve0 {
+	status = "okay";
+};
+
+&pixelvalve1 {
+	status = "okay";
+};
+
+&pixelvalve2 {
+	status = "okay";
+};
+
+&pixelvalve3 {
+	status = "okay";
+};
+
+&pixelvalve4 {
+	status = "okay";
+};
+
+&hdmi0 {
+	status = "okay";
+};
+
+&ddc0 {
+	status = "okay";
+};
+
+&hdmi1 {
+	status = "okay";
+};
+
+&ddc1 {
+	status = "okay";
+};
+
+// =============================================
+// Downstream rpi- changes
+
+#include "bcm270x.dtsi"
+
+/ {
+	soc {
+		/delete-node/ pixelvalve@7e807000;
+		/delete-node/ hdmi@7e902000;
+	};
+};
+
+#include "bcm2711-rpi.dtsi"
+#include "bcm283x-rpi-csi1-2lane.dtsi"
+#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
+
+/delete-node/ &emmc2;
+
+/ {
+	chosen {
+		bootargs = "coherent_pool=1M 8250.nr_uarts=1 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1";
+	};
+
+	aliases {
+		serial0 = &uart1;
+		serial1 = &uart0;
+		mmc0 = &emmc2;
+		mmc1 = &mmcnr;
+		mmc2 = &sdhost;
+		/delete-property/ i2c2;
+		i2c3 = &i2c3;
+		i2c4 = &i2c4;
+		i2c5 = &i2c5;
+		i2c6 = &i2c6;
+		/delete-property/ ethernet;
+		/delete-property/ intc;
+		pcie0 = &pcie0;
+		emmc2bus = &emmc2bus;
+	};
+
+	emmc2bus: emmc2bus {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <1>;
+
+		ranges = <0x0 0x7e000000  0x0 0xfe000000  0x01800000>;
+		dma-ranges = <0x0 0xc0000000  0x0 0x00000000  0x40000000>;
+
+		emmc2: emmc2@7e340000 {
+			compatible = "brcm,bcm2711-emmc2";
+			status = "okay";
+			interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clocks BCM2711_CLOCK_EMMC2>;
+			reg = <0x0 0x7e340000 0x100>;
+			vqmmc-supply = <&sd_io_1v8_reg>;
+			broken-cd;
+		};
+	};
+
+	/delete-node/ wifi-pwrseq;
+};
+
+&mmcnr {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdio_pins>;
+	bus-width = <4>;
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-0 = <&uart0_pins &bt_pins>;
+	status = "okay";
+
+	/delete-node/ bluetooth;
+};
+
+&uart1 {
+	pinctrl-0 = <&uart1_pins>;
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
+	cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
+
+	spidev0: spidev@0{
+		compatible = "spidev";
+		reg = <0>;	/* CE0 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <125000000>;
+	};
+
+	spidev1: spidev@1{
+		compatible = "spidev";
+		reg = <1>;	/* CE1 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <125000000>;
+	};
+};
+
+&gpio {
+	spi0_pins: spi0_pins {
+		brcm,pins = <9 10 11>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+	};
+
+	spi0_cs_pins: spi0_cs_pins {
+		brcm,pins = <8 7>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	spi3_pins: spi3_pins {
+		brcm,pins = <1 2 3>;
+		brcm,function = <BCM2835_FSEL_ALT3>;
+	};
+
+	spi3_cs_pins: spi3_cs_pins {
+		brcm,pins = <0 24>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	spi4_pins: spi4_pins {
+		brcm,pins = <5 6 7>;
+		brcm,function = <BCM2835_FSEL_ALT3>;
+	};
+
+	spi4_cs_pins: spi4_cs_pins {
+		brcm,pins = <4 25>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	spi5_pins: spi5_pins {
+		brcm,pins = <13 14 15>;
+		brcm,function = <BCM2835_FSEL_ALT3>;
+	};
+
+	spi5_cs_pins: spi5_cs_pins {
+		brcm,pins = <12 26>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	spi6_pins: spi6_pins {
+		brcm,pins = <19 20 21>;
+		brcm,function = <BCM2835_FSEL_ALT3>;
+	};
+
+	spi6_cs_pins: spi6_cs_pins {
+		brcm,pins = <18 27>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	i2c0_pins: i2c0 {
+		brcm,pins = <0 1>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+		brcm,pull = <BCM2835_PUD_UP>;
+	};
+
+	i2c1_pins: i2c1 {
+		brcm,pins = <2 3>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+		brcm,pull = <BCM2835_PUD_UP>;
+	};
+
+	i2c3_pins: i2c3 {
+		brcm,pins = <4 5>;
+		brcm,function = <BCM2835_FSEL_ALT5>;
+		brcm,pull = <BCM2835_PUD_UP>;
+	};
+
+	i2c4_pins: i2c4 {
+		brcm,pins = <8 9>;
+		brcm,function = <BCM2835_FSEL_ALT5>;
+		brcm,pull = <BCM2835_PUD_UP>;
+	};
+
+	i2c5_pins: i2c5 {
+		brcm,pins = <12 13>;
+		brcm,function = <BCM2835_FSEL_ALT5>;
+		brcm,pull = <BCM2835_PUD_UP>;
+	};
+
+	i2c6_pins: i2c6 {
+		brcm,pins = <22 23>;
+		brcm,function = <BCM2835_FSEL_ALT5>;
+		brcm,pull = <BCM2835_PUD_UP>;
+	};
+
+	i2s_pins: i2s {
+		brcm,pins = <18 19 20 21>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+	};
+
+	sdio_pins: sdio_pins {
+		brcm,pins =     <34 35 36 37 38 39>;
+		brcm,function = <BCM2835_FSEL_ALT3>; // alt3 = SD1
+		brcm,pull =     <0 2 2 2 2 2>;
+	};
+
+	bt_pins: bt_pins {
+		brcm,pins = "-"; // non-empty to keep btuart happy, //4 = 0
+				 // to fool pinctrl
+		brcm,function = <0>;
+		brcm,pull = <2>;
+	};
+
+	uart0_pins: uart0_pins {
+		brcm,pins = <32 33>;
+		brcm,function = <BCM2835_FSEL_ALT3>;
+		brcm,pull = <0 2>;
+	};
+
+	uart1_pins: uart1_pins {
+		brcm,pins;
+		brcm,function;
+		brcm,pull;
+	};
+
+	uart2_pins: uart2_pins {
+		brcm,pins = <0 1>;
+		brcm,function = <BCM2835_FSEL_ALT4>;
+		brcm,pull = <0 2>;
+	};
+
+	uart3_pins: uart3_pins {
+		brcm,pins = <4 5>;
+		brcm,function = <BCM2835_FSEL_ALT4>;
+		brcm,pull = <0 2>;
+	};
+
+	uart4_pins: uart4_pins {
+		brcm,pins = <8 9>;
+		brcm,function = <BCM2835_FSEL_ALT4>;
+		brcm,pull = <0 2>;
+	};
+
+	uart5_pins: uart5_pins {
+		brcm,pins = <12 13>;
+		brcm,function = <BCM2835_FSEL_ALT4>;
+		brcm,pull = <0 2>;
+	};
+};
+
+&i2c0if {
+	clock-frequency = <100000>;
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2s {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+};
+
+/ {
+	__overrides__ {
+		/delete-property/ i2c2_baudrate;
+		/delete-property/ i2c2_iknowwhatimdoing;
+	};
+};
+
+// =============================================
+// Board specific stuff here
+
+/ {
+	sd_vcc_reg: sd_vcc_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc-sd";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		enable-active-high;
+		gpio = <&expgpio 6 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&sdhost {
+	status = "disabled";
+};
+
+&emmc2 {
+	vmmc-supply = <&sd_vcc_reg>;
+	bus-width = <8>;
+};
+
+&phy1 {
+	led-modes = <0x00 0x08>; /* link/activity link */
+};
+
+&gpio {
+	audio_pins: audio_pins {
+		brcm,pins = <40 41>;
+		brcm,function = <4>;
+	};
+};
+
+&leds {
+	act_led: act {
+		label = "led0";
+		linux,default-trigger = "mmc0";
+		gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
+	};
+
+	pwr_led: pwr {
+		label = "led1";
+		linux,default-trigger = "default-on";
+		gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&pwm1 {
+	status = "disabled";
+};
+
+&audio {
+	pinctrl-names = "default";
+	pinctrl-0 = <&audio_pins>;
+};
+
+&vc4 {
+	status = "disabled";
+};
+
+&pixelvalve0 {
+	status = "disabled";
+};
+
+&pixelvalve1 {
+	status = "disabled";
+};
+
+&pixelvalve2 {
+	status = "disabled";
+};
+
+&pixelvalve3 {
+	status = "disabled";
+};
+
+&pixelvalve4 {
+	status = "disabled";
+};
+
+&hdmi0 {
+	status = "disabled";
+};
+
+&ddc0 {
+	status = "disabled";
+};
+
+&hdmi1 {
+	status = "disabled";
+};
+
+&ddc1 {
+	status = "disabled";
+};
+
+/ {
+	__overrides__ {
+		act_led_gpio = <&act_led>,"gpios:4";
+		act_led_activelow = <&act_led>,"gpios:8";
+		act_led_trigger = <&act_led>,"linux,default-trigger";
+
+		pwr_led_gpio = <&pwr_led>,"gpios:4";
+		pwr_led_activelow = <&pwr_led>,"gpios:8";
+		pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
+
+		eth_led0 = <&phy1>,"led-modes:0";
+		eth_led1 = <&phy1>,"led-modes:4";
+
+		ant1 =  <&ant1>,"output-high?=on",
+			<&ant1>, "output-low?=off",
+			<&ant2>, "output-high?=off",
+			<&ant2>, "output-low?=on";
+		ant2 =  <&ant1>,"output-high?=off",
+			<&ant1>, "output-low?=on",
+			<&ant2>, "output-high?=on",
+			<&ant2>, "output-low?=off";
+		noant = <&ant1>,"output-high?=off",
+			<&ant1>, "output-low?=on",
+			<&ant2>, "output-high?=off",
+			<&ant2>, "output-low?=on";
+
+		spi_dma4 = <&spi0>, "dmas:0=", <&dma40>,
+			   <&spi0>, "dmas:8=", <&dma40>;
+	};
+};
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -92,6 +92,12 @@ Name:   <The base DTB>
 Info:   Configures the base Raspberry Pi hardware
 Load:   <loaded automatically>
 Params:
+        ant1                    Select antenna 1 (default). CM4 only.
+
+        ant2                    Select antenna 2. CM4 only.
+
+        noant                   Disable both antennas. CM4 only.
+
         audio                   Set to "on" to enable the onboard ALSA audio
                                 interface (default "off")
 
