-#define IOCTL_DEVICERESET 0x8004 /* Reset the cp210x */
-#define IOCTL_PORTCONFGET 0x8005 /* Get port configuration */
-#define IOCTL_PORTCONFSET 0x8006 /* Set port configuration */
-#define IOCTL_SETVID 0x8007 /* Set vendor id */
-#define IOCTL_SETPID 0x8008 /* Set product id */
-#define IOCTL_SETMFG 0x8009 /* Set manufacturer string */
-#define IOCTL_SETPRODUCT 0x800a /* Set product string */
-#define IOCTL_SETSERIAL 0x800b /* Set serial number string */
-#define IOCTL_SETDEVVER 0x800c /* Set device version id */
+#define CP210x_IOCTL_DEVICERESET (SIOCDEVPRIVATE + 4) /* Reset the cp210x */
+#define CP210x_IOCTL_PORTCONFGET (SIOCDEVPRIVATE + 5) /* Get port configuration */
+#define CP210x_IOCTL_PORTCONFSET (SIOCDEVPRIVATE + 6) /* Set port configuration */
+#define CP210x_IOCTL_SETVID (SIOCDEVPRIVATE + 7) /* Set vendor id */
+#define CP210x_IOCTL_SETPID (SIOCDEVPRIVATE + 8) /* Set product id */
+#define CP210x_IOCTL_SETMFG (SIOCDEVPRIVATE + 9) /* Set manufacturer string */
+#define CP210x_IOCTL_SETPRODUCT (SIOCDEVPRIVATE + 10) /* Set product string */
+#define CP210x_IOCTL_SETSERIAL (SIOCDEVPRIVATE + 11) /* Set serial number string */
+#define CP210x_IOCTL_SETDEVVER (SIOCDEVPRIVATE + 12) /* Set device version id */