From d351bcc03373d42abd07f6462fdb76964d61adee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?William=20B=C3=A9rub=C3=A9?= <wberube@null.net>
Date: Fri, 31 May 2024 20:01:50 -0400
Subject: [PATCH] Preparing to support GPIOs on older kernels

---
 src/gpio.c | 9 +++++++--
 src/gpio.h | 7 ++++---
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/gpio.c b/src/gpio.c
index 7038647..9a2b278 100644
--- a/src/gpio.c
+++ b/src/gpio.c
@@ -1,7 +1,9 @@
 #include "gpio.h"
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
 const char *paths[] = {"/dev/gpiochip0", "/sys/class/gpio/gpiochip0"};
 const char **path = paths;
+
 int fd_gpio = 0;
 
 char gpio_count = 0;
@@ -12,7 +14,6 @@ void gpio_deinit(void) {
     fd_gpio = 0;
 }
 
-#ifdef __arm__
 int gpio_init(void) {
     while (*path++) {
         if (access(*path, 0)) continue;
@@ -81,6 +82,10 @@ int gpio_write(char pin, bool value) {
     return EXIT_SUCCESS;
 }
 #else
+void gpio_deinit(void) {
+
+}
+
 int gpio_init(void) {
     return EXIT_SUCCESS;
 }
@@ -92,4 +97,4 @@ int gpio_read(char pin, bool *value) {
 int gpio_write(char pin, bool value) {
     return EXIT_SUCCESS;
 }
-#endif
+#endif
\ No newline at end of file
diff --git a/src/gpio.h b/src/gpio.h
index 6489945..2ec53f1 100644
--- a/src/gpio.h
+++ b/src/gpio.h
@@ -1,13 +1,14 @@
 #include <fcntl.h>
+#include <linux/version.h>
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/ioctl.h>
 #include <unistd.h>
 
-#ifdef __arm__
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
 #include <linux/gpio.h>
+#include <sys/ioctl.h>
 #endif
 
 #define GPIO_ERROR(x, ...) fprintf(stderr, "%s \033[31m%s\033[0m\n", "[gpio] (x)", ##__VA_ARGS__)
@@ -15,4 +16,4 @@
 void gpio_deinit(void);
 int gpio_init(void);
 int gpio_read(char pin, bool *value);
-int gpio_write(char pin, bool value);
+int gpio_write(char pin, bool value);
\ No newline at end of file