From e4fdee8e3b41239242a8f421a28736ef8e08ca55 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 11 May 2005 11:34:32 -0700
Subject: [SUNSAB]: Defer register updates until transmitter is idle.

The chip can emit garbage characters if we touch the
settings while characters are going out.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/serial/sunsab.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/serial/sunsab.h')

diff --git a/drivers/serial/sunsab.h b/drivers/serial/sunsab.h
index 686086fcbbf5..b78e1f7b8050 100644
--- a/drivers/serial/sunsab.h
+++ b/drivers/serial/sunsab.h
@@ -126,6 +126,7 @@ union sab82532_irq_status {
 /* irqflags bits */
 #define SAB82532_ALLS			0x00000001
 #define SAB82532_XPR			0x00000002
+#define SAB82532_REGS_PENDING		0x00000004
 
 /* RFIFO Status Byte */
 #define SAB82532_RSTAT_PE		0x80
-- 
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