[PATCH v6 10/12] ARM: dts: aspeed: anacapa: Add LPDB fuse monitor GPIO expander

From: Colin Huang via B4 Relay

Date: Tue Aug 25 2026 - 06:52:49 EST


From: Rex Fu <rex.fu.amd@xxxxxxxxx>

Add PCA9554 GPIO expanders for PDB fuse monitor signals on the
Anacapa DVT board.

The patch adds GPIO expander definitions for both the left and
right PDBs under the i2c8 multiplexer and updates the associated
gpio-line-names to reflect the final signal assignments.

Signed-off-by: Rex Fu <rex.fu.amd@xxxxxxxxx>
---
.../dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dts | 92 ++++++++++++++++++++++
1 file changed, 92 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dts
index 975d603ca540..923954cff7a2 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dts
@@ -8,6 +8,98 @@ / {
model = "Facebook Anacapa BMC";
};

+// MB - PDB
+&i2c8 {
+ i2c-mux@72 {
+ i2c@0 {
+ gpio@22 {
+ gpio-line-names =
+ "RPDB_FAN_FULL_SPEED_R_N", "RPDB_I2C_TMP432_U8_ALERT_R_N",
+ "RPDB_I2C_TMP432_U29_ALERT_R_N", "RPDB_GLOBAL_WP",
+ "RPDB_FAN_CT_FAN_FAIL_R_N", "RPDB_VERID_A0",
+ "RPDB_VERID_A1", "RPDB_VERID_A2",
+ "RPDB_ALERT_P50V_HSC2_R_N", "RPDB_ALERT_P50V_HSC3_R_N",
+ "RPDB_ALERT_P50V_HSC4_R_N", "RPDB_ALERT_P50V_STBY_R_N",
+ "RPDB_P12V_MB_VRM_ALERT_R_N",
+ "RPDB_P12V_STBY_VRM_ALERT_R_N",
+ "RPDB_PGD_P3V3_STBY_PWRGD_R",
+ "RPDB_P12V_STBY_VRM_PWRGD_BUF_R";
+ };
+
+ gpio@24 {
+ gpio-line-names =
+ "RPDB_EAM2_PRSNT_MOS_N_R", "RPDB_EAM3_PRSNT_MOS_N_R",
+ "RPDB_PWRGD_P50V_HSC4_SYS_R",
+ "RPDB_PWRGD_P50V_STBY_SYS_BUF_R",
+ "RPDB_P50V_FAN5_R2_PG", "RPDB_P50V_FAN6_R2_PG",
+ "RPDB_P50V_FAN7_R2_PG", "RPDB_P50V_FAN8_R2_PG",
+ "RPDB_SKU_ID0", "RPDB_FAN5_PRSNT_N_R",
+ "", "RPDB_FAN6_PRSNT_N_R",
+ "RPDB_FAN7_PRSNT_N_R", "RPDB_FAN8_PRSNT_N_R",
+ "", "";
+ };
+
+ gpio@38 {
+ compatible = "nxp,pca9554";
+ reg = <0x38>;
+ #gpio-cells = <2>;
+ gpio-controller;
+
+ gpio-line-names =
+ "RPDB_P50V_FUSE2_TVS1", "RPDB_P50V_FUSE2_TVS2",
+ "RPDB_P50V_FUSE3_TVS1", "RPDB_P50V_FUSE3_TVS2",
+ "RPDB_P50V_FUSE4_TVS1", "",
+ "", "";
+
+ interrupt-parent = <&sgpiom0>;
+ interrupts = <174 IRQ_TYPE_LEVEL_LOW>;
+ };
+ };
+
+ i2c@1 {
+ gpio@22 {
+ gpio-line-names =
+ "LPDB_FAN_FULL_SPEED_R_N", "LPDB_I2C_TEMP75_U8_ALERT_R_N",
+ "LPDB_I2C_TMP432_U29_ALERT_R_N", "LPDB_GLOBAL_WP",
+ "LPDB_FAN_CT_FAN_FAIL_R_N", "LPDB_VERID_A0",
+ "LPDB_VERID_A1", "LPDB_VERID_A2",
+ "LPDB_ALERT_P50V_HSC0_R_N", "LPDB_ALERT_P50V_HSC1_R_N",
+ "LPDB_ALERT_P50V_HSC5_R_N", "LPDB_I2C_P12V_SW_VRM_ALERT_R_N",
+ "LPDB_EAM0_PRSNT_MOS_N_R", "LPDB_EAM1_PRSNT_MOS_N_R",
+ "LPDB_PWRGD_P50V_HSC5_SYS_R", "BARKLIP_PRSNT_N_R3";
+ };
+
+ gpio@24 {
+ gpio-line-names =
+ "LPDB_P50V_FAN0_R2_PG", "LPDB_P50V_FAN1_R2_PG",
+ "LPDB_P50V_FAN2_R2_PG", "LPDB_P50V_FAN3_R2_PG",
+ "LPDB_P50V_FAN4_R2_PG", "LPDB_FAN0_PRSNT_N_R",
+ "LPDB_FAN1_PRSNT_N_R", "LPDB_FAN2_PRSNT_N_R",
+ "LPDB_FAN3_PRSNT_N_R", "LPDB_FAN4_PRSNT_N_R",
+ "LPDB_SKU_ID0", "",
+ "", "",
+ "", "LPDB_PG_P3V3_R";
+ };
+
+ gpio@38 {
+ compatible = "nxp,pca9554";
+ reg = <0x38>;
+ #gpio-cells = <2>;
+ gpio-controller;
+
+ gpio-line-names =
+ "LPDB_P50V_FUSE0_TVS1", "LPDB_P50V_FUSE0_TVS2",
+ "LPDB_P50V_FUSE1_TVS1", "LPDB_P50V_FUSE1_TVS2",
+ "LPDB_P50V_FUSE5_TVS1", "",
+ "", "";
+
+ interrupt-parent = <&sgpiom0>;
+ interrupts = <174 IRQ_TYPE_LEVEL_LOW>;
+ };
+ };
+ };
+};
+
&sgpiom0 {
bus-frequency = <2000000>;
gpio-line-names =

--
2.34.1