serial: UniPhier: add .pending handler

Without .pending handler, tstc() function always returns 1.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

diff --git a/drivers/serial/serial_uniphier.c b/drivers/serial/serial_uniphier.c
index 9114b3ed6002a1a0d9e3c6303ad07993060b07f9..faa69f0a27ec8ad7c735becda1ea2cc814c51335 100644 (file)
--- a/drivers/serial/serial_uniphier.c
+++ b/drivers/serial/serial_uniphier.c
@@ -93,6 +93,16 @@ static int uniphier_serial_putc(struct udevice *dev, const char c)
        return 0;
 }
 
+static int uniphier_serial_pending(struct udevice *dev, bool input)
+{
+       struct uniphier_serial __iomem *port = uniphier_serial_port(dev);
+
+       if (input)
+               return readb(&port->lsr) & UART_LSR_DR;
+       else
+               return !(readb(&port->lsr) & UART_LSR_THRE);
+}
+
 int uniphier_serial_probe(struct udevice *dev)
 {
        struct uniphier_serial_private_data *priv = dev_get_priv(dev);
@@ -134,6 +144,7 @@ static const struct dm_serial_ops uniphier_serial_ops = {
        .setbrg = uniphier_serial_setbrg,
        .getc = uniphier_serial_getc,
        .putc = uniphier_serial_putc,
+       .pending = uniphier_serial_pending,
 };
 
 U_BOOT_DRIVER(uniphier_serial) = {