Blackfin arch: emulate a TTY over the EMUDAT/JTAG interface

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/early_printk.c b/arch/blackfin/kernel/early_printk.c
index 60f67f90fe3..1f4e3d2e090 100644
--- a/arch/blackfin/kernel/early_printk.c
+++ b/arch/blackfin/kernel/early_printk.c
@@ -35,6 +35,9 @@
 extern struct console *bfin_earlyserial_init(unsigned int port,
                                                 unsigned int cflag);
 #endif
+#ifdef CONFIG_BFIN_JTAG_COMM
+extern struct console *bfin_jc_early_init(void);
+#endif
 
 static struct console *early_console;
 
@@ -142,6 +145,15 @@ int __init setup_early_printk(char *buf)
                 early_console = earlyserial_init(buf);
         }
 #endif
+
+#ifdef CONFIG_BFIN_JTAG_COMM
+        /* Check for Blackfin JTAG */
+        if (!strncmp(buf, "jtag", 4)) {
+                buf += 4;
+                early_console = bfin_jc_early_init();
+        }
+#endif
+
 #ifdef CONFIG_FB
                 /* TODO: add framebuffer console support */
 #endif