From d8e9ffba072ce61bdf527d3a1ab51a69bf13cd03 Mon Sep 17 00:00:00 2001
From: joerg65 <joerg.wolff@gmx.de>
Date: Fri, 21 Feb 2020 18:10:42 +0100
Subject: [PATCH] Added i2C support C1/C2 for mainline kernel

---
 wiringPi/wiringPiI2C.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/wiringPi/wiringPiI2C.c b/wiringPi/wiringPiI2C.c
index 312e13e..44d183d 100755
--- a/wiringPi/wiringPiI2C.c
+++ b/wiringPi/wiringPiI2C.c
@@ -53,7 +53,7 @@
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <asm/ioctl.h>
-
+#include <sys/stat.h>
 #include "wiringPi.h"
 #include "wiringPiI2C.h"
 
@@ -224,12 +224,17 @@ int wiringPiI2CSetup (const int devId)
 {
 	int model, rev, mem, maker, overVolted ;
 	const char *device = NULL;
+	struct stat buffer;
 
 	piBoardId (&model, &rev, &mem, &maker, &overVolted) ;
 
 	switch(model)	{
 	case MODEL_ODROID_C1:	case MODEL_ODROID_C2:
-		device = "/dev/i2c-1";
+		if (stat ("/dev/i2c-0", &buffer) == 0) {
+			device = "/dev/i2c-0";
+		} else {
+			device = "/dev/i2c-1";
+		}
 	break;
 	case MODEL_ODROID_XU3:
 	case MODEL_ODROID_N1: