dt-uart: Clarify log messages at init time.

- Don't log at all if console=dtuart (the default) was not present, in
  that case the user has asked for something else, no need for every
  other driver to tell them this.
- Use "dtuart" in all other messages, rather than just "console" or
  "uart".
- Be more explicit if we are exiting because dtuart= wasn't given.
- Log the options which we've parsed.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Julien Grall <julien.grall@linaro.org>

diff --git a/xen/drivers/char/dt-uart.c b/xen/drivers/char/dt-uart.c
index 45a87a6e572960f766eeb5ec7f14cade23f340aa..04dbb9706a5aab0fc956f800593a940f16af8fdc 100644 (file)
--- a/xen/drivers/char/dt-uart.c
+++ b/xen/drivers/char/dt-uart.c
@@ -41,9 +41,12 @@ void __init dt_uart_init(void)
     const char *devpath = opt_dtuart;
     char *options;
 
-    if ( !console_has("dtuart") || !strcmp(opt_dtuart, "") )
+    if ( !console_has("dtuart") )
+        return; /* Not for us */
+
+    if ( !strcmp(opt_dtuart, "") )
     {
-        printk("No console\n");
+        printk("No dtuart path configured\n");
         return;
     }
 
@@ -53,7 +56,7 @@ void __init dt_uart_init(void)
     else
         options = "";
 
-    printk("Looking for UART console %s\n", devpath);
+    printk("Looking for dtuart at \"%s\", options \"%s\"\n", devpath, options);
     if ( *devpath == '/' )
         dev = dt_find_node_by_path(devpath);
     else
@@ -68,7 +71,7 @@ void __init dt_uart_init(void)
     ret = device_init(dev, DEVICE_SERIAL, options);
 
     if ( ret )
-        printk("Unable to initialize serial: %d\n", ret);
+        printk("Unable to initialize dtuart: %d\n", ret);
 }
 
 /*