From 2c7791a42728ffce5474fa8b7c60b9685ae74013 Mon Sep 17 00:00:00 2001
From: Darren Hsu <darrenhsu@google.com>
Date: Thu, 4 May 2023 11:12:25 +0800
Subject: [PATCH] powerstats: update NFC sysfs path

Bug: 280560362
Test: pts-tradefed run singleCommand pts -m PtsPowerTestCases
Change-Id: I727627a343c9c52e67f252a0ce6362667f411efd
Signed-off-by: Darren Hsu <darrenhsu@google.com>
---
 powerstats/felix/service.cpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/powerstats/felix/service.cpp b/powerstats/felix/service.cpp
index 2ccabb0..2de3797 100644
--- a/powerstats/felix/service.cpp
+++ b/powerstats/felix/service.cpp
@@ -28,6 +28,7 @@
 #include <android/binder_manager.h>
 #include <android/binder_process.h>
 #include <log/log.h>
+#include <sys/stat.h>
 
 using aidl::android::hardware::power::stats::DevfreqStateResidencyDataProvider;
 using aidl::android::hardware::power::stats::DisplayStateResidencyDataProvider;
@@ -140,6 +141,18 @@ void addGPU(std::shared_ptr<PowerStats> p) {
             stateCoeffs));
 }
 
+std::string getNfcPath() {
+    struct stat buffer;
+    int size = 128;
+    char path[size];
+    for (int i = 0; i < 10; i++) {
+        std::snprintf(path, size,
+                "/sys/devices/platform/10970000.hsi2c/i2c-%d/i2c-st21nfc/power_stats", i);
+        if (!stat(path, &buffer)) break;
+    }
+    return std::string(path);
+}
+
 int main() {
     LOG(INFO) << "Pixel PowerStats HAL AIDL Service is starting.";
 
@@ -160,7 +173,7 @@ int main() {
     addWifi(p);
     addTPU(p);
     addUfs(p);
-    addNFC(p, "/sys/devices/platform/10970000.hsi2c/i2c-4/i2c-st21nfc/power_stats");
+    addNFC(p, getNfcPath());
     addUwb(p);
     addPowerDomains(p);
     addDevfreq(p);