[PATCH v7 09/11] ARM: dts: aspeed: anacapa: Add LPDB fuse monitor GPIO expander
From: Colin Huang via B4 Relay
Date: Tue Sep 01 2026 - 08:28:17 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>
---
.../aspeed/aspeed-bmc-facebook-anacapa-dvt.dtsi | 92 ++++++++++++++++++++++
1 file changed, 92 insertions(+)
diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dtsi b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dtsi
index 6650a5e4e130..cb4c41bd8b8f 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dtsi
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-dvt.dtsi
@@ -3,6 +3,98 @@
/dts-v1/;
#include "aspeed-bmc-facebook-anacapa-evt2.dtsi"
+// 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 {
gpio-line-names =
/*in - out */
--
2.34.1