USB: fix usb-serial/ftdi build warning

Fix annoying build warning:

drivers/usb/serial/ftdi_sio.c:890: warning: enumeration value `FT232RL' not handled in switch

Also add logic to detect FT232R chips (version 6.00, usb 2.0 full speed),
so that case isn't completely useless.  (NOTE:  FT232RL and FT232RQ are
the same chip in different packages:  L is SSOP, Q is QFN.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 1633a0f..8ff9d54 100644 (file)
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -879,6 +879,7 @@ static __u32 get_ftdi_divisor(struct usb_serial_port * port)
                break;
        case FT232BM: /* FT232BM chip */
        case FT2232C: /* FT2232C chip */
+       case FT232RL:
                if (baud <= 3000000) {
                        div_value = ftdi_232bm_baud_to_divisor(baud);
                } else {
@@ -1021,9 +1022,12 @@ static void ftdi_determine_type(struct usb_serial_port *port)
                /* (It might be a BM because of the iSerialNumber bug,
                 * but it will still work as an AM device.) */
                priv->chip_type = FT8U232AM;
-       } else {
+       } else if (version < 0x600) {
                /* Assume its an FT232BM (or FT245BM) */
                priv->chip_type = FT232BM;
+       } else {
+               /* Assume its an FT232R  */
+               priv->chip_type = FT232RL;
        }
        info("Detected %s", ftdi_chip_name[priv->chip_type]);
 }