serial: 8250: Add Quark X1000 to 8250_pci.c

Quark X1000 contains two designware derived 8250 serial ports.
Each port has a unique PCI configuration space consisting of
BAR0:UART BAR1:DMA respectively.

Unlike the standard 8250 the register width is 32 bits for RHR,IER etc
The Quark UART has a fundamental clock @ 44.2368 MHz allowing for a
bitrate of up to about 2.76 megabits per second.

This patch enables standard 8250 mode

Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 61830b1792eb..14d3e6be8800 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1788,6 +1788,7 @@ pci_wch_ch353_setup(struct serial_private *priv,
 #define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022
 #define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a
 #define PCI_DEVICE_ID_AMCC_ADDIDATA_APCI7800 0x818e
+#define PCI_DEVICE_ID_INTEL_QRK_UART    0x0936
 
 #define PCI_VENDOR_ID_SUNIX             0x1fd4
 #define PCI_DEVICE_ID_SUNIX_1999        0x1999
@@ -1898,6 +1899,13 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .setup          = byt_serial_setup,
         },
+        {
+                .vendor         = PCI_VENDOR_ID_INTEL,
+                .device         = PCI_DEVICE_ID_INTEL_QRK_UART,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_default_setup,
+        },
         /*
          * ITE
          */
@@ -2740,6 +2748,7 @@ enum pci_board_num_t {
         pbn_ADDIDATA_PCIe_8_3906250,
         pbn_ce4100_1_115200,
         pbn_byt,
+        pbn_qrk,
         pbn_omegapci,
         pbn_NETMOS9900_2s_115200,
         pbn_brcm_trumanage,
@@ -3490,6 +3499,12 @@ static struct pciserial_board pci_boards[] = {
                 .uart_offset    = 0x80,
                 .reg_shift      = 2,
         },
+        [pbn_qrk] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 1,
+                .base_baud      = 2764800,
+                .reg_shift      = 2,
+        },
         [pbn_omegapci] = {
                 .flags          = FL_BASE0,
                 .num_ports      = 8,
@@ -5192,6 +5207,12 @@ static struct pci_device_id serial_pci_tbl[] = {
                 pbn_byt },
 
         /*
+         * Intel Quark x1000
+         */
+        {       PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_QRK_UART,
+                PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+                pbn_qrk },
+        /*
          * Cronyx Omega PCI
          */
         {       PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_CRONYX_OMEGA,