ARM: dts: Add Raspberry Pi Compute Module 4 IO Board

This adds the matching carrier for Raspberry Pi Compute Module 4.
Instead of xHCI USB host controller there is just a USB 2.0 interface
connected to the DWC2 controller from the BCM2711. As a result
there is a free PCIe Gen 2 socket. Also there are 2 full-size HDMI 2.0
connectors.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1628334401-6577-10-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Nicolas Saenz Julienne <nsaenz@kernel.org>

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 7e09341..ce8f508 100644 (file)
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -92,6 +92,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
        bcm2837-rpi-cm3-io3.dtb \
        bcm2711-rpi-400.dtb \
        bcm2711-rpi-4-b.dtb \
+       bcm2711-rpi-cm4-io.dtb \
        bcm2835-rpi-zero.dtb \
        bcm2835-rpi-zero-w.dtb
 dtb-$(CONFIG_ARCH_BCM_5301X) += \

diff --git a/arch/arm/boot/dts/bcm2711-rpi-cm4-io.dts b/arch/arm/boot/dts/bcm2711-rpi-cm4-io.dts
new file mode 100644 (file)
index 0000000..19600b6
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2711-rpi-cm4-io.dts
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2711-rpi-cm4.dtsi"
+#include "bcm283x-rpi-usb-host.dtsi"
+
+/ {
+       model = "Raspberry Pi Compute Module 4 IO Board";
+
+       leds {
+               led-act {
+                       gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
+               };
+
+               led-pwr {
+                       label = "PWR";
+                       gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
+                       default-state = "keep";
+                       linux,default-trigger = "default-on";
+               };
+       };
+};
+
+&ddc0 {
+       status = "okay";
+};
+
+&ddc1 {
+       status = "okay";
+};
+
+&gpio {
+       /*
+        * Parts taken from rpi_SCH_4b_4p0_reduced.pdf and
+        * the official GPU firmware DT blob.
+        *
+        * Legend:
+        * "FOO" = GPIO line named "FOO" on the schematic
+        * "FOO_N" = GPIO line named "FOO" on schematic, active low
+        */
+       gpio-line-names = "ID_SDA",
+                         "ID_SCL",
+                         "SDA1",
+                         "SCL1",
+                         "GPIO_GCLK",
+                         "GPIO5",
+                         "GPIO6",
+                         "SPI_CE1_N",
+                         "SPI_CE0_N",
+                         "SPI_MISO",
+                         "SPI_MOSI",
+                         "SPI_SCLK",
+                         "GPIO12",
+                         "GPIO13",
+                         /* Serial port */
+                         "TXD1",
+                         "RXD1",
+                         "GPIO16",
+                         "GPIO17",
+                         "GPIO18",
+                         "GPIO19",
+                         "GPIO20",
+                         "GPIO21",
+                         "GPIO22",
+                         "GPIO23",
+                         "GPIO24",
+                         "GPIO25",
+                         "GPIO26",
+                         "GPIO27",
+                         "RGMII_MDIO",
+                         "RGMIO_MDC",
+                         /* Used by BT module */
+                         "CTS0",
+                         "RTS0",
+                         "TXD0",
+                         "RXD0",
+                         /* Used by Wifi */
+                         "SD1_CLK",
+                         "SD1_CMD",
+                         "SD1_DATA0",
+                         "SD1_DATA1",
+                         "SD1_DATA2",
+                         "SD1_DATA3",
+                         /* Shared with SPI flash */
+                         "PWM0_MISO",
+                         "PWM1_MOSI",
+                         "STATUS_LED_G_CLK",
+                         "SPIFLASH_CE_N",
+                         "SDA0",
+                         "SCL0",
+                         "RGMII_RXCLK",
+                         "RGMII_RXCTL",
+                         "RGMII_RXD0",
+                         "RGMII_RXD1",
+                         "RGMII_RXD2",
+                         "RGMII_RXD3",
+                         "RGMII_TXCLK",
+                         "RGMII_TXCTL",
+                         "RGMII_TXD0",
+                         "RGMII_TXD1",
+                         "RGMII_TXD2",
+                         "RGMII_TXD3";
+};
+
+&hdmi0 {
+       status = "okay";
+};
+
+&hdmi1 {
+       status = "okay";
+};
+
+&genet {
+       status = "okay";
+};
+
+&pixelvalve0 {
+       status = "okay";
+};
+
+&pixelvalve1 {
+       status = "okay";
+};
+
+&pixelvalve2 {
+       status = "okay";
+};
+
+&pixelvalve4 {
+       status = "okay";
+};
+
+&vc4 {
+       status = "okay";
+};
+
+&vec {
+       status = "disabled";
+};