.gitignore

@@ -4,4 +4,3 @@
 ###################
 *.o
 funkey_gpio_management
-termfix

README.md

@@ -1,4 +0,0 @@
-# FunKey-GPIO-Mapping
-Embedded Linux OS GPIO mapping daemon for the FunKey S retro-gaming console
-
-**Note**: This repository is archived and read-only, as this functionality is now handled by [fkgpiod](https://github.com/FunKey-Project/fkgpiod).

driver_pcal6416a.c

@@ -26,26 +26,11 @@
 	#define DEBUG_PRINTF(...)
 #endif
 
-/****************************************************************
- * Structures
- ****************************************************************/
-
-typedef struct {
-    unsigned int address;
-    char *name;
-} i2c_expander_t;
-
 /****************************************************************
  * Static variables
  ****************************************************************/
 static int fd_i2c_expander;
-static unsigned int i2c_expander_addr;
 static char i2c0_sysfs_filename[] = "/dev/i2c-0";
-static i2c_expander_t i2c_chip[] = {
-    {PCAL9539A_I2C_ADDR, "PCAL9539A"},
-    {PCAL6416A_I2C_ADDR, "PCAL6416A"},
-    {0, NULL}
-};
 
 /****************************************************************
  * Static functions
@@ -55,32 +40,20 @@ static i2c_expander_t i2c_chip[] = {
  * Public functions
  ****************************************************************/
 bool pcal6416a_init(void) {
-    int i;
-
     if ((fd_i2c_expander = open(i2c0_sysfs_filename,O_RDWR)) < 0) {
         printf("Failed to open the I2C bus %s", i2c0_sysfs_filename);
         // ERROR HANDLING; you can check errno to see what went wrong 
         return false;
     }
 
-    /// Probing known I2C GPIO expander chips
-    for (i = 0, i2c_expander_addr = 0; i2c_chip[i].address; i++) {
-
-        if (ioctl(fd_i2c_expander, I2C_SLAVE_FORCE, i2c_chip[i]) < 0 ||
-	    pcal6416a_read_mask_interrupts() < 0) {
-            DEBUG_PRINTF("In %s - Failed to acquire bus access and/or talk to slave %s at address 0x%02X.\n",
-		   __func__, i2c_chip[i].name, i2c_chip[i].address);
-    	} else {
-    	    DEBUG_PRINTF("Found I2C gpio expander chip %s at address 0x%02X\n",
-    	        i2c_chip[i].name, i2c_chip[i].address);
-    	    i2c_expander_addr = i2c_chip[i].address;
-            break;
+    if (ioctl(fd_i2c_expander,I2C_SLAVE,PCAL6416A_I2C_ADDR) < 0) {
+        printf("In pcal6416a_init - Failed to acquire bus access and/or talk to slave.\n");
+        // ERROR HANDLING; you can check errno to see what went wrong 
+        if (ioctl(fd_i2c_expander, I2C_SLAVE_FORCE, PCAL6416A_I2C_ADDR) < 0) {
+            printf("In pcal6416a_init - Failed to acquire FORCED bus access and/or talk to slave.\n");
+            // ERROR HANDLING; you can check errno to see what went wrong 
+            return false;
         }
-    }
-
-    /// GPIO expander chip found?
-    if(!i2c_expander_addr){
-        printf("In %s - Failed to acquire bus access and/or talk to slave, exit\n", __func__);
         return false;
     }
 

driver_pcal6416a.h

@@ -12,7 +12,6 @@
  ****************************************************************/
 // Chip physical address
 #define PCAL6416A_I2C_ADDR			0x20
-#define PCAL9539A_I2C_ADDR			0x76
 
 // Chip registers adresses
 #define PCAL6416A_INPUT				0x00 /* Input port [RO] */

gpio_mapping.c

@@ -491,3 +491,4 @@ int listen_gpios_interrupts(void)
 
 	return 0;
 }
+