There's nothing special on this device: it has just one port.

The only difference is that it uses a different register set.

Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
---
 drivers/usb/serial/xr_serial.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/usb/serial/xr_serial.c b/drivers/usb/serial/xr_serial.c
index f7edab61a3d6..78722502da63 100644
--- a/drivers/usb/serial/xr_serial.c
+++ b/drivers/usb/serial/xr_serial.c
@@ -99,6 +99,7 @@ struct xr_txrx_clk_mask {
 #define VIA_CDC_REGISTER               -1
 
 enum xr_model {
+       XR21B1411,
        XR21V141X,
        XR21B142X,
        MAX_XR_MODELS
@@ -132,6 +133,30 @@ enum xr_hal_type {
 };
 
 static const int xr_hal_table[MAX_XR_MODELS][MAX_XR_HAL_TYPE] = {
+       [XR21B1411] = {
+               [REG_ENABLE] =                          0xc00,
+               [REG_FORMAT] =                          VIA_CDC_REGISTER,
+               [REG_FLOW_CTRL] =                       0xc06,
+               [REG_XON_CHAR] =                        0xc07,
+               [REG_XOFF_CHAR] =                       0xc08,
+               [REG_TX_BREAK] =                        0xc0a,
+               [REG_RS485_DELAY] =                     0xc0b,
+               [REG_GPIO_MODE] =                       0xc0c,
+               [REG_GPIO_DIR] =                        0xc0d,
+               [REG_GPIO_SET] =                        0xc0e,
+               [REG_GPIO_CLR] =                        0xc0f,
+               [REG_GPIO_STATUS] =                     0xc10,
+               [REG_GPIO_INT_MASK] =                   0xc11,
+               [REG_CUSTOMIZED_INT] =                  0xc12,
+               [REG_GPIO_PULL_UP_ENABLE] =             0xc14,
+               [REG_GPIO_PULL_DOWN_ENABLE] =           0xc15,
+               [REG_LOOPBACK] =                        0xc16,
+               [REG_LOW_LATENCY] =                     0xcc2,
+               [REG_CUSTOM_DRIVER] =                   0x20d,
+
+               [REQ_SET] =                             0,
+               [REQ_GET] =                             1,
+       },
        [XR21V141X] = {
                [REG_ENABLE] =                          0x03,
                [REG_FORMAT] =                          0x0b,
@@ -190,6 +215,8 @@ static int xr_set_reg(struct usb_serial_port *port, u8 
block, u8 reg, u8 val)
        int ret;
 
        switch (port_priv->model) {
+       case XR21B1411:
+               break;
        case XR21V141X:
                if (port_priv->channel)
                        reg |= (port_priv->channel - 1) << 8;
@@ -226,6 +253,8 @@ static int xr_get_reg(struct usb_serial_port *port, u8 
block, u8 reg, u8 *val)
                return -ENOMEM;
 
        switch (port_priv->model) {
+       case XR21B1411:
+               break;
        case XR21V141X:
                if (port_priv->channel)
                        reg |= (port_priv->channel - 1) << 8;
@@ -874,6 +903,7 @@ static void xr_disconnect(struct usb_serial *serial)
 
 static const struct usb_device_id id_table[] = {
        { USB_DEVICE(0x04e2, 0x1410), .driver_info = XR21V141X},
+       { USB_DEVICE(0x04e2, 0x1411), .driver_info = XR21B1411},
        { USB_DEVICE(0x04e2, 0x1412), .driver_info = XR21V141X},
        { USB_DEVICE(0x04e2, 0x1414), .driver_info = XR21V141X},
 
-- 
2.29.2

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