The Raspberry Pi Compute Module 4 (CM4) are SoMs which contain the
following:
* BCM2711 quad core processor
* up to 8 GB RAM
* up to 32 GB eMMC
* a GPIO expander
* Gigabit PHY BCM54210PE
* Wifi/BT module with internal and external antenna
The eMMC and the Wifi/BT module are optional.
Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
---
arch/arm/boot/dts/bcm2711-rpi-cm4.dtsi | 112 +++++++++++++++++++++++++++++++++
1 file changed, 112 insertions(+)
create mode 100644 arch/arm/boot/dts/bcm2711-rpi-cm4.dtsi
diff --git a/arch/arm/boot/dts/bcm2711-rpi-cm4.dtsi b/arch/arm/boot/dts/bcm2711-rpi-cm4.dtsi
new file mode 100644
index 0000000..2fa8704
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2711-rpi-cm4.dtsi
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2711.dtsi"
+#include "bcm2711-rpi.dtsi"
+#include "bcm283x-rpi-wifi-bt.dtsi"
+
+/ {
+ compatible = "raspberrypi,4-compute-module", "brcm,bcm2711";
+
+ chosen {
+ /* 8250 auxiliary UART instead of pl011 */
+ stdout-path = "serial1:115200n8";
+ };
+
+ 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";
+ };
+
+ 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>;
+ };
+};
+
+&bt {
+ shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
+};
+
+/*
+ * EMMC2 is used to drive the eMMC
+ * Unfortunately the IP block seems to be limited to 100 MHz
+ */
+&emmc2 {
+ bus-width = <8>;
+ vqmmc-supply = <&sd_io_1v8_reg>;
+ vmmc-supply = <&sd_vcc_reg>;
+ broken-cd;
+ status = "okay";
+};
+
+&expgpio {
+ gpio-line-names = "BT_ON",
+ "WL_ON",
+ "PWR_LED_OFF",
+ "ANT1",
+ "VDD_SD_IO_SEL",
+ "CAM_GPIO",
+ "SD_PWR_ON",
+ "ANT2";
+
+ ant1: ant1-hog {
+ /* internal antenna enabled */
+ gpio-hog;
+ gpios = <3 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "ant1";
+ };
+
+ ant2: ant2-hog {
+ /* external antenna disabled */
+ gpio-hog;
+ gpios = <7 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "ant2";
+ };
+};
+
+&genet {
+ phy-handle = <&phy1>;
+ phy-mode = "rgmii-rxid";
+ status = "okay";
+};
+
+&genet_mdio {
+ phy1: ethernet-phy@0 {
+ /* No PHY interrupt */
+ reg = <0x0>;
+ };
+};
+
+/* uart0 communicates with the BT module */
+&uart0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32>;
+ uart-has-rtscts;
+};
+
+/* uart1 is mapped to the pin header */
+&uart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart1_gpio14>;
+ status = "okay";
+};
+
+&wifi_pwrseq {
+ reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
+};
--
2.7.4
