[PATCH 5/5] ARM: dts: aspeed: Add Facebook Darwin (AST2600) BMC

rentao.bupt
2025-07-02T05:04:34Z

From: Tao Ren <rentao.bupt@gmail.com>

Add initial device tree for the Meta (Facebook) Darwin AST2600 BMC.

Darwin is Meta's rack switch platform with an AST2600 BMC integrated for
health monitoring purpose.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
---
arch/arm/boot/dts/aspeed/Makefile | 1 +
.../dts/aspeed/aspeed-bmc-facebook-darwin.dts | 92 +++++++++++++++++++
2 files changed, 93 insertions(+)
create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-darwin.dts

diff --git a/arch/arm/boot/dts/aspeed/Makefile b/arch/arm/boot/dts/aspeed/Makefile
index 2e5f4833a073..debbfc0151f8 100644
--- a/arch/arm/boot/dts/aspeed/Makefile
+++ b/arch/arm/boot/dts/aspeed/Makefile
@@ -20,6 +20,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
aspeed-bmc-facebook-bletchley.dtb \
aspeed-bmc-facebook-catalina.dtb \
aspeed-bmc-facebook-cmm.dtb \
+ aspeed-bmc-facebook-darwin.dtb \
aspeed-bmc-facebook-elbert.dtb \
aspeed-bmc-facebook-fuji.dtb \
aspeed-bmc-facebook-galaxy100.dtb \
diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-darwin.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-darwin.dts
new file mode 100644
index 000000000000..f902230dada3
--- /dev/null
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-darwin.dts
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2021 Facebook Inc.
+
+/dts-v1/;
+
+#include "ast2600-facebook-netbmc-common.dtsi"
+
+/ {
+ model = "Facebook Darwin BMC";
+ compatible = "facebook,darwin-bmc", "aspeed,ast2600";
+
+ aliases {
+ serial0 = &uart5;
+ serial1 = &uart1;
+ serial2 = &uart2;
+ serial3 = &uart3;
+ };
+
+ chosen {
+ stdout-path = &uart5;
+ };
+
+ iio-hwmon {
+ compatible = "iio-hwmon";
+ io-channels = <&adc0 0>, <&adc0 1>, <&adc0 2>, <&adc0 3>,
+ <&adc0 4>, <&adc0 5>, <&adc0 6>, <&adc0 7>,
+ <&adc1 0>, <&adc1 1>, <&adc1 2>, <&adc1 3>,
+ <&adc1 4>, <&adc1 5>, <&adc1 6>, <&adc1 7>;
+ };
+
+ spi_gpio: spi {
+ num-chipselects = <1>;
+ cs-gpios = <&gpio0 ASPEED_GPIO(X, 0) GPIO_ACTIVE_LOW>;
+ };
+};
+
+/*
+ * BMC's "mac3" controller is connected to BCM53134P's IMP_RGMII port
+ * directly (fixed link, no PHY in between).
+ * Note: BMC's "mdio0" controller is connected to BCM53134P's MDIO
+ * interface, and the MDIO channel will be enabled in dts later (when
+ * "bcm53xx" driver's probe failure is solved on the platform).
+ */
+&mac3 {
+ status = "okay";
+ phy-mode = "rgmii";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_rgmii4_default>;
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+};
+
+&i2c0 {
+ eeprom@50 {
+ compatible = "atmel,24c512";
+ reg = <0x50>;
+ };
+};
+
+&adc0 {
+ ref_voltage = <2500>;
+ status = "okay";
+
+ pinctrl-0 = <&pinctrl_adc0_default &pinctrl_adc1_default
+ &pinctrl_adc2_default &pinctrl_adc3_default
+ &pinctrl_adc4_default &pinctrl_adc5_default
+ &pinctrl_adc6_default &pinctrl_adc7_default>;
+};
+
+&adc1 {
+ ref_voltage = <2500>;
+ status = "okay";
+
+ pinctrl-0 = <&pinctrl_adc8_default &pinctrl_adc9_default
+ &pinctrl_adc10_default &pinctrl_adc11_default
+ &pinctrl_adc12_default &pinctrl_adc13_default
+ &pinctrl_adc14_default &pinctrl_adc15_default>;
+};
+
+&emmc_controller {
+ status = "okay";
+};
+
+&emmc {
+ status = "okay";
+
+ non-removable;
+ max-frequency = <25000000>;
+ bus-width = <4>;
+};
--
2.47.1