[SERIAL] serial_cs: Add quirk for brainboxes 2-port RS232 card

Mauro Ziliani reports that this card has a higher clock rate.
Rather than tweak the 8250 driver to handle this, add a quirk to
pass the correct clock rate to the driver.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/serial/serial_cs.c b/drivers/serial/serial_cs.c
index 704922073bbf..1267cbed52f5 100644
--- a/drivers/serial/serial_cs.c
+++ b/drivers/serial/serial_cs.c
@@ -85,6 +85,7 @@ struct serial_quirk {
         unsigned int prodid;
         int multi;              /* 1 = multifunction, > 1 = # ports */
         void (*config)(struct pcmcia_device *);
+        void (*setup)(struct pcmcia_device *, struct uart_port *);
         void (*wakeup)(struct pcmcia_device *);
         int (*post)(struct pcmcia_device *);
 };
@@ -108,6 +109,16 @@ struct serial_cfg_mem {
         u_char buf[256];
 };
 
+/*
+ * vers_1 5.0, "Brain Boxes", "2-Port RS232 card", "r6"
+ * manfid 0x0160, 0x0104
+ * This card appears to have a 14.7456MHz clock.
+ */
+static void quirk_setup_brainboxes_0104(struct pcmcia_device *link, struct uart_port *port)
+{
+        port->uartclk = 14745600;
+}
+
 static int quirk_post_ibm(struct pcmcia_device *link)
 {
         conf_reg_t reg = { 0, CS_READ, 0x800, 0 };
@@ -192,6 +203,11 @@ static void quirk_config_socket(struct pcmcia_device *link)
 
 static const struct serial_quirk quirks[] = {
         {
+                .manfid = 0x0160,
+                .prodid = 0x0104,
+                .multi  = -1,
+                .setup  = quirk_setup_brainboxes_0104,
+        }, {
                 .manfid = MANFID_IBM,
                 .prodid = ~0,
                 .multi  = -1,
@@ -386,6 +402,10 @@ static int setup_serial(struct pcmcia_device *handle, struct serial_info * info,
         port.dev = &handle_to_dev(handle);
         if (buggy_uart)
                 port.flags |= UPF_BUGGY_UART;
+
+        if (info->quirk && info->quirk->setup)
+                info->quirk->setup(handle, &port);
+
         line = serial8250_register_port(&port);
         if (line < 0) {
                 printk(KERN_NOTICE "serial_cs: serial8250_register_port() at "