serial: 8250_lpss: enable MSI for Intel Quark

Intel Quark SoC supports MSI for LPSS, in particular for UART. Enable MSI for
Intel Quark.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index f3cf4e8..c0db2a8 100644 (file)
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -151,6 +151,20 @@ static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
        return 0;
 }
 
+static int qrk_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
+{
+       struct pci_dev *pdev = to_pci_dev(port->dev);
+       int ret;
+
+       ret = pci_alloc_irq_vectors(pdev, 1, 1, 0);
+       if (ret < 0)
+               return ret;
+
+       port->irq = pci_irq_vector(pdev, 0);
+
+       return 0;
+}
+
 static bool lpss8250_dma_filter(struct dma_chan *chan, void *param)
 {
        struct dw_dma_slave *dws = param;
@@ -261,6 +275,7 @@ static const struct lpss8250_board byt_board = {
 static const struct lpss8250_board qrk_board = {
        .freq = 44236800,
        .base_baud = 2764800,
+       .setup = qrk_serial_setup,
 };
 
 #define LPSS_DEVICE(id, board) { PCI_VDEVICE(INTEL, id), (kernel_ulong_t)&board }