Set mangoh yellow nfc slave address back to default of 0x66

nfc_mangoh_slave_address.c

#include <linux/i2c.h>
#include <linux/i2c-help.h>
#include <sys/ioctl.h>

#include "legato.h"

#define ADAPTER "/dev/i2c-8"
#define BAD_ADDRESS 0x00
#define GOOD_ADDRESS 0x55

int open_nfc_file(uint8_t address) 
{
    int file = open(ADAPTER, O_RDWD);
    if (file < 0) 
    {
        LE_ERROR("Failed to open adapter.");
        goto exit;
    }
  
    if (ioctl(file, I2C_SLAVE_FORCE, address) < 0) 
        LE_ERROR("Failed i2c transaction: %m");
  
exit:
    return file;
}

COMPONENT_INIT
{
    LE_INFO("Starting...");
    int file = open_nfc_file(BAD_ADDRESS);
    if (file < 0)
        exit(-1);
  
    char unsigned buf[17];
  
    buf[0] = 0x00;
    buf[1] = GOOD_ADDRESS << 1; // This set the address back to 0x55
    buf[2] = 0x00; 
    buf[3] = 0x00;
    buf[4] = 0x00;
    buf[5] = 0x00; 
    buf[6] = 0x00; 
    buf[7] = 0x00;
    buf[8] = 0x00;
    buf[9] = 0x00;
    buf[10] = 0x00;
    buf[11] = 0x00;
    buf[12] = 0x00;
    buf[13] = 0xE1;
    buf[14] = 0x10;
    buf[15] = 0x6D;
    buf[16] = 0x00;
    
    int res = write(file, buf, 17);
    LE_ERROR_IF(res == -1, "ERROR: %m");
    LE_INFO_IF(res != -1, "%m);
    
    close(file);
}

https://community.nxp.com/t5/NFC/NTAG-NT3H2111-NT3H2211-I-C-Communication-Problem/m-p/1274330
https://community.nxp.com/t5/NFC/initialize-NT3H2111/m-p/1019784