def METHOD_NAME(self, reg_name):
    # On successful read, returns the value read from given
    # reg name and on failure rethrns 'ERR'
    cpld_dir = "/sys/devices/platform/dell-n3248pxe-cpld.0/"
    cpld_reg_file = cpld_dir + '/' + reg_name
    try:
        rv = open(cpld_reg_file, 'r').read()
    except IOError : return 'ERR'
    return rv.strip('\r\n').lstrip(' ')