linux-kernel - [PATCH] synclink_gt add serial bit order control

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Date:	Thu, 17 Jul 2008 11:54:55 -0500
From:	Paul Fulghum <paulkf@...rogate.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] synclink_gt add serial bit order control

Add control of hardware serial bit order between
LSB first (default/standard) and MSB first.

Signed-off-by: Paul Fulghum <paulkf@...rogate.com>

--- a/include/linux/synclink.h	2008-07-17 11:45:48.000000000 -0500
+++ b/include/linux/synclink.h	2008-07-17 11:46:52.000000000 -0500
@@ -136,6 +136,7 @@
 #define MGSL_INTERFACE_RTS_EN   0x10
 #define MGSL_INTERFACE_LL       0x20
 #define MGSL_INTERFACE_RL       0x40
+#define MGSL_INTERFACE_MSB_FIRST 0x80
 
 typedef struct _MGSL_PARAMS
 {
--- a/drivers/char/synclink_gt.c	2008-07-17 08:39:06.000000000 -0500
+++ b/drivers/char/synclink_gt.c	2008-07-17 11:45:10.000000000 -0500
@@ -4430,6 +4430,8 @@ static void msc_set_vcr(struct slgt_info
 		break;
 	}
 
+	if (info->if_mode & MGSL_INTERFACE_MSB_FIRST)
+		val |= BIT4;
 	if (info->signals & SerialSignal_DTR)
 		val |= BIT3;
 	if (info->signals & SerialSignal_RTS)


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