dm: serial: add "serial_dev_" API for normal serial device

"serial_" API is designed for UART debug and "serial_stub_" API
is designed for stdio device(e.g. keyboard, video, lcd...).

We need new API for normal serial device, e.g. a UART working
with other peripheral device.

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ifc2cb2ca9c1d4a395e89ceb5e059ec05a07b1967

drivers/serial/serial-uclass.c

@@ -307,6 +307,58 @@ void serial_clear(void)
 	__serial_clear(gd->cur_serial_dev);
 }
 
+void serial_dev_putc(struct udevice *dev, char ch)
+{
+	if (!dev)
+		return;
+
+	_serial_putc(dev, ch);
+}
+
+void serial_dev_puts(struct udevice *dev, const char *str)
+{
+	if (!dev)
+		return;
+
+	_serial_puts(dev, str);
+}
+
+int serial_dev_getc(struct udevice *dev)
+{
+	if (!dev)
+		return 0;
+
+	return _serial_getc(dev);
+}
+
+int serial_dev_tstc(struct udevice *dev)
+{
+	if (!dev)
+		return 0;
+
+	return _serial_tstc(dev);
+}
+
+void serial_dev_setbrg(struct udevice *dev, int baudrate)
+{
+	struct dm_serial_ops *ops;
+
+	if (!dev)
+		return;
+
+	ops = serial_get_ops(dev);
+	if (ops->setbrg)
+		ops->setbrg(dev, baudrate);
+}
+
+void serial_dev_clear(struct udevice *dev)
+{
+	if (!dev)
+		return;
+
+	__serial_clear(dev);
+}
+
 void serial_stdio_init(void)
 {
 }

include/serial.h

@@ -207,4 +207,12 @@ void sh_serial_initialize(void);
 void uartlite_serial_initialize(void);
 void zynq_serial_initialize(void);
 
+/* serial device */
+int serial_dev_getc(struct udevice *dev);
+int serial_dev_tstc(struct udevice *dev);
+void serial_dev_putc(struct udevice *dev, char ch);
+void serial_dev_puts(struct udevice *dev, const char *str);
+void serial_dev_setbrg(struct udevice *dev, int baudrate);
+void serial_dev_clear(struct udevice *dev);
+
 #endif