From 417d54649dc945460010913d98223e9272f3f888 Mon Sep 17 00:00:00 2001
From: mstroh76 <m.stroh76@gmail.com>
Date: Tue, 27 Feb 2024 20:22:54 +0100
Subject: [PATCH] #25

---
 gpio/gpio.c         |  2 +-
 wiringPi/wiringPi.c | 13 +++++++++++++
 wiringPi/wiringPi.h |  1 +
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/gpio/gpio.c b/gpio/gpio.c
index 0f0dd06..c4d698e 100644
--- a/gpio/gpio.c
+++ b/gpio/gpio.c
@@ -1338,7 +1338,7 @@ static void doVersion (char *argv [])
     }
   }
 
-  if (stat ("/dev/gpiomem", &statBuf) == 0)		// User level GPIO is GO
+  if (wiringPiUserLevelAccess())		// User level GPIO is GO
     printf ("  * This Raspberry Pi supports user-level GPIO access.\n") ;
   else
     printf ("  * Root or sudo required for GPIO access.\n") ;
diff --git a/wiringPi/wiringPi.c b/wiringPi/wiringPi.c
index d0bce4f..bbf1713 100644
--- a/wiringPi/wiringPi.c
+++ b/wiringPi/wiringPi.c
@@ -2553,6 +2553,19 @@ void wiringPiVersion (int *major, int *minor)
 }
 
 
+int wiringPiUserLevelAccess(void)
+{
+  struct stat statBuf ;
+  const char* gpiomemModule = gpiomem_BCM;
+
+  if (PI_MODEL_5 == RaspberryPiModel) {
+    gpiomemModule = gpiomem_RP1;
+  }
+
+  return stat(gpiomemModule, &statBuf) == 0 ? 1 : 0;
+}
+
+
 /*
  * wiringPiSetup:
  *	Must be called once at the start of your program execution.
diff --git a/wiringPi/wiringPi.h b/wiringPi/wiringPi.h
index 462900e..94875b2 100644
--- a/wiringPi/wiringPi.h
+++ b/wiringPi/wiringPi.h
@@ -206,6 +206,7 @@ extern struct wiringPiNodeStruct *wiringPiNewNode  (int pinBase, int numPins) ;
 extern int GPIOToSysFS(const int pin) ;
 
 extern void wiringPiVersion	(int *major, int *minor) ;
+extern int  wiringPiUserLevelAccess (void) ;
 extern int  wiringPiSetup       (void) ;
 extern int  wiringPiSetupSys    (void) ;
 extern int  wiringPiSetupGpio   (void) ;