From: Mike Frysinger <vapier.adi@gmail.com>
Date: Fri, 10 Oct 2008 09:37:52 +0000 (+0800)
Subject: Blackfin arch: emulate a TTY over the EMUDAT/JTAG interface
X-Git-Tag: firefly_0821_release~17712^2~14
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a88c71e4367aada2065c5e247477c891d2ca952f;p=firefly-linux-kernel-4.4.55.git

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>
---

diff --git a/arch/blackfin/kernel/early_printk.c b/arch/blackfin/kernel/early_printk.c
index 60f67f90fe35..1f4e3d2e0901 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