diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 089fd43e3784..a795bd971eaa 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1201,6 +1201,55 @@ pci_xr17v35x_setup(struct serial_private *priv,
 	return pci_default_setup(priv, board, port, idx);
 }
 
+#define PCI_DEVICE_ID_COMMTECH_4222PCI335 0x0004
+#define PCI_DEVICE_ID_COMMTECH_4224PCI335 0x0002
+#define PCI_DEVICE_ID_COMMTECH_2324PCI335 0x000a
+#define PCI_DEVICE_ID_COMMTECH_2328PCI335 0x000b
+
+static int
+pci_fastcom335_setup(struct serial_private *priv,
+		  const struct pciserial_board *board,
+		  struct uart_8250_port *port, int idx)
+{
+	u8 __iomem *p;
+
+	p = pci_ioremap_bar(priv->dev, 0);
+	if (p == NULL)
+		return -ENOMEM;
+
+	port->port.flags |= UPF_EXAR_EFR;
+
+	/*
+	 * Setup Multipurpose Input/Output pins.
+	 */
+	if (idx == 0) {
+		switch (priv->dev->device) {
+		case PCI_DEVICE_ID_COMMTECH_4222PCI335:
+		case PCI_DEVICE_ID_COMMTECH_4224PCI335:
+			writeb(0x78, p + 0x90); /* MPIOLVL[7:0] */
+			writeb(0x00, p + 0x92); /* MPIOINV[7:0] */
+			writeb(0x00, p + 0x93); /* MPIOSEL[7:0] */
+			break;
+		case PCI_DEVICE_ID_COMMTECH_2324PCI335:
+		case PCI_DEVICE_ID_COMMTECH_2328PCI335:
+			writeb(0x00, p + 0x90); /* MPIOLVL[7:0] */
+			writeb(0xc0, p + 0x92); /* MPIOINV[7:0] */
+			writeb(0xc0, p + 0x93); /* MPIOSEL[7:0] */
+			break;
+		}
+		writeb(0x00, p + 0x8f); /* MPIOINT[7:0] */
+		writeb(0x00, p + 0x91); /* MPIO3T[7:0] */
+		writeb(0x00, p + 0x94); /* MPIOOD[7:0] */
+	}
+	writeb(0x00, p + UART_EXAR_8XMODE);
+	writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
+	writeb(32, p + UART_EXAR_TXTRG);
+	writeb(32, p + UART_EXAR_RXTRG);
+	iounmap(p);
+
+	return pci_default_setup(priv, board, port, idx);
+}
+
 static int
 pci_wch_ch353_setup(struct serial_private *priv,
                     const struct pciserial_board *board,
@@ -1250,6 +1299,10 @@ pci_wch_ch353_setup(struct serial_private *priv,
 #define PCI_VENDOR_ID_AGESTAR		0x5372
 #define PCI_DEVICE_ID_AGESTAR_9375	0x6872
 #define PCI_VENDOR_ID_ASIX		0x9710
+#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0019
+#define PCI_DEVICE_ID_COMMTECH_4224PCIE	0x0020
+#define PCI_DEVICE_ID_COMMTECH_4228PCIE	0x0021
+
 
 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */
 #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584	0x1584
@@ -1845,6 +1898,59 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
 		.subdevice	= PCI_ANY_ID,
 		.setup		= pci_asix_setup,
 	},
+	/*
+	 * Commtech, Inc. Fastcom adapters
+	 *
+	 */
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_4222PCI335,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_fastcom335_setup,
+	},
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_4224PCI335,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_fastcom335_setup,
+	},
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_2324PCI335,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_fastcom335_setup,
+	},
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_2328PCI335,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_fastcom335_setup,
+	},
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_4222PCIE,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_xr17v35x_setup,
+	},
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_4224PCIE,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_xr17v35x_setup,
+	},
+	{
+		.vendor = PCI_VENDOR_ID_COMMTECH,
+		.device = PCI_DEVICE_ID_COMMTECH_4228PCIE,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.setup		= pci_xr17v35x_setup,
+	},
 	/*
 	 * Default "match everything" terminator entry
 	 */
@@ -1921,6 +2027,10 @@ enum pci_board_num_t {
 
 	pbn_b0_4_1152000,
 
+	pbn_b0_2_1152000_200,
+	pbn_b0_4_1152000_200,
+	pbn_b0_8_1152000_200,
+
 	pbn_b0_2_1843200,
 	pbn_b0_4_1843200,
 
@@ -2118,6 +2228,27 @@ static struct pciserial_board pci_boards[] = {
 		.uart_offset	= 8,
 	},
 
+	[pbn_b0_2_1152000_200] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 2,
+		.base_baud	= 1152000,
+		.uart_offset	= 0x200,
+	},
+
+	[pbn_b0_4_1152000_200] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 4,
+		.base_baud	= 1152000,
+		.uart_offset	= 0x200,
+	},
+
+	[pbn_b0_8_1152000_200] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 2,
+		.base_baud	= 1152000,
+		.uart_offset	= 0x200,
+	},
+
 	[pbn_b0_2_1843200] = {
 		.flags		= FL_BASE0,
 		.num_ports	= 2,
@@ -4356,6 +4487,38 @@ static struct pci_device_id serial_pci_tbl[] = {
 		PCI_ANY_ID, PCI_ANY_ID,
 		0, 0, pbn_b0_bt_2_115200 },
 
+	/*
+	 * Commtech, Inc. Fastcom adapters
+	 */
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4222PCI335,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_b0_2_1152000_200 },
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4224PCI335,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_b0_4_1152000_200 },
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_2324PCI335,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_b0_4_1152000_200 },
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_2328PCI335,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_b0_8_1152000_200 },
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4222PCIE,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_exar_XR17V352 },
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4224PCIE,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_exar_XR17V354 },
+	{	PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4228PCIE,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0,
+		0, pbn_exar_XR17V358 },
+
 	/*
 	 * These entries match devices with class COMMUNICATION_SERIAL,
 	 * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 0199a7a76fcb..0f8447376ddb 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2326,6 +2326,8 @@
 
 #define PCI_VENDOR_ID_TOPSPIN		0x1867
 
+#define PCI_VENDOR_ID_COMMTECH		0x18f7
+
 #define PCI_VENDOR_ID_SILAN		0x1904
 
 #define PCI_VENDOR_ID_RENESAS		0x1912