From 7c1fff58cfaaf1c4b6a31a569e18cb7d2d8db0a6 Mon Sep 17 00:00:00 2001
From: Paul Fulghum <paulkf@microgate.com>
Date: Fri, 9 Sep 2005 13:02:14 -0700
Subject: [PATCH] [PATCH] synclink.c: add loopback to async mode

Add internal loopback support for asynchronous mode operation.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/char/synclink.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 26b421b74bb..ea2d54be484 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -6151,6 +6151,11 @@ static void usc_set_async_mode( struct mgsl_struct *info )
 		usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
 	}
 
+	if (info->params.loopback) {
+		info->loopback_bits = 0x300;
+		outw(0x0300, info->io_base + CCAR);
+	}
+
 }	/* end of usc_set_async_mode() */
 
 /* usc_loopback_frame()
-- 
2.41.0