USB: serial: mos7840: add a product ID for the new product

Add a new PID 0x7843 to the driver.
Let the new products be able to set up 3 serial ports with the driver.

Note that this depends on e8603076f540 ("USB: serial: mos7840: clean up
register handling").

Signed-off-by: JackyChou <jackychou@asix.com.tw>
[ johan: mention dependency in case anyone wants to backport this ]
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 4159d31..6ff6d67 100644 (file)
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -94,6 +94,7 @@
 /* The native mos7840/7820 component */
 #define USB_VENDOR_ID_MOSCHIP           0x9710
 #define MOSCHIP_DEVICE_ID_7840          0x7840
+#define MOSCHIP_DEVICE_ID_7843          0x7843
 #define MOSCHIP_DEVICE_ID_7820          0x7820
 #define MOSCHIP_DEVICE_ID_7810          0x7810
 /* The native component can have its vendor/device id's overridden
@@ -176,6 +177,7 @@ enum mos7840_flag {
 
 static const struct usb_device_id id_table[] = {
        {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
+       {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7843)},
        {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
        {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
        {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
@@ -2028,7 +2030,8 @@ static int mos7840_probe(struct usb_serial *serial,
        int device_type;
 
        if (product == MOSCHIP_DEVICE_ID_7810 ||
-               product == MOSCHIP_DEVICE_ID_7820) {
+               product == MOSCHIP_DEVICE_ID_7820 ||
+               product == MOSCHIP_DEVICE_ID_7843) {
                device_type = product;
                goto out;
        }
@@ -2062,7 +2065,10 @@ static int mos7840_calc_num_ports(struct usb_serial *serial,
        int device_type = (unsigned long)usb_get_serial_data(serial);
        int num_ports;
 
-       num_ports = (device_type >> 4) & 0x000F;
+       if (device_type == MOSCHIP_DEVICE_ID_7843)
+               num_ports = 3;
+       else
+               num_ports = (device_type >> 4) & 0x000F;
 
        /*
         * num_ports is currently never zero as device_type is one of