serial: sandbox: Allow serial output without device tree

At present sandbox assumes that device-tree control is active, but this
may not be the case in SPL or TPL. Add some conditions to handle this.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/serial/sandbox.c b/drivers/serial/sandbox.c
index 4fbc595..9e9bf3e 100644 (file)
--- a/drivers/serial/sandbox.c
+++ b/drivers/serial/sandbox.c
@@ -22,6 +22,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+
 /*
  *
  *   serial_buf: A buffer that holds keyboard characters for the
@@ -142,6 +144,7 @@ static int sandbox_serial_getc(struct udevice *dev)
        serial_buf_read = increment_buffer_index(serial_buf_read);
        return result;
 }
+#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
 
 #ifdef CONFIG_DEBUG_UART_SANDBOX
 
@@ -173,6 +176,7 @@ static int sandbox_serial_setconfig(struct udevice *dev, uint serial_config)
        return 0;
 }
 
+#if CONFIG_IS_ENABLED(OF_CONTROL)
 static const char * const ansi_colour[] = {
        "black", "red", "green", "yellow", "blue", "megenta", "cyan",
        "white",
@@ -232,3 +236,4 @@ U_BOOT_DEVICE(serial_sandbox_non_fdt) = {
        .name = "serial_sandbox",
        .platdata = &platdata_non_fdt,
 };
+#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */