serial: ns16550: Provide ->getinfo() implementation

New callback will supply necessary information, for example,
to ACPI SPCR table.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 9d78b1f..f3bd8db 100644 (file)
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -372,6 +372,25 @@ static int ns16550_serial_setconfig(struct udevice *dev, uint serial_config)
        return 0;
 }
 
+static int ns16550_serial_getinfo(struct udevice *dev,
+                                 struct serial_device_info *info)
+{
+       struct NS16550 *const com_port = dev_get_priv(dev);
+       struct ns16550_platdata *plat = com_port->plat;
+
+       info->type = SERIAL_CHIP_16550_COMPATIBLE;
+#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
+       info->addr_space = SERIAL_ADDRESS_SPACE_IO;
+#else
+       info->addr_space = SERIAL_ADDRESS_SPACE_MEMORY;
+#endif
+       info->addr = plat->base;
+       info->reg_width = plat->reg_width;
+       info->reg_shift = plat->reg_shift;
+       info->reg_offset = plat->reg_offset;
+       return 0;
+}
+
 int ns16550_serial_probe(struct udevice *dev)
 {
        struct NS16550 *const com_port = dev_get_priv(dev);
@@ -479,7 +498,8 @@ const struct dm_serial_ops ns16550_serial_ops = {
        .pending = ns16550_serial_pending,
        .getc = ns16550_serial_getc,
        .setbrg = ns16550_serial_setbrg,
-       .setconfig = ns16550_serial_setconfig
+       .setconfig = ns16550_serial_setconfig,
+       .getinfo = ns16550_serial_getinfo,
 };
 
 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)