From f9b1ce97407f0077e8141cf7cd7cda1657bd1d05 Mon Sep 17 00:00:00 2001
From: Shirish Pargaonkar <Shirish.Pargaonkar@amd.com>
Date: Fri, 7 Aug 2026 16:57:12 -0500
Subject: [PATCH] Use getSubTreePaths to obtain fan objects that have interface
 xyz.openbmc_project.Sensor.Value using Object Mapper.

These fan objects are created under service
xyz.openbmc_project.FanSensor

With the current version of Entity Manager, it does not
have support for D-Bus interfaces "Associations" such as
cooled_by and it does not support "Exposes" within
"Type": "Chassis"

Tested: On congo

Signed-off-by: Shirish Pargaonkar <Shirish.Pargaonkar@amd.com>
---
 redfish-core/lib/fan.hpp | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/redfish-core/lib/fan.hpp b/redfish-core/lib/fan.hpp
index c10288df7e..08f3439b7e 100644
--- a/redfish-core/lib/fan.hpp
+++ b/redfish-core/lib/fan.hpp
@@ -36,7 +36,7 @@
 namespace redfish
 {
 constexpr std::array<std::string_view, 1> fanInterface = {
-    "xyz.openbmc_project.Inventory.Item.Fan"};
+    "xyz.openbmc_project.Sensor.Value"};
 
 inline void updateFanList(
     const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
@@ -65,16 +65,13 @@ inline void updateFanList(
 
 inline void getFanPaths(
     const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
-    const std::string& validChassisPath,
+    const std::string& /* validChassisPath */,
     const std::function<void(const dbus::utility::MapperGetSubTreePathsResponse&
                                  fanPaths)>& callback)
 {
-    sdbusplus::message::object_path endpointPath{validChassisPath};
-    endpointPath /= "cooled_by";
-
-    dbus::utility::getAssociatedSubTreePaths(
-        endpointPath,
-        sdbusplus::message::object_path("/xyz/openbmc_project/inventory"), 0,
+    dbus::utility::getSubTreePaths(
+        "/xyz/openbmc_project/sensors/fan_tach",
+        0,
         fanInterface,
         [asyncResp, callback](
             const boost::system::error_code& ec,