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Revert part of changes in rev 1.298: 

- it breaks cobalt's serial console as mentioned in PR port-cobalt/44292
 - MCR_PRESCALE doesn't affect unless EFR_EFCR is set in the EFR register
 - even if MCR_PRESCALE is enabled we should define appropriate sc_type
   variants and BRG values should be adjusted in comspeed() per sc_type
 - sc_frequency should be adjusted in MD attachment if necessary
Tested on cobalt by several people, ok from jklos@
This commit is contained in:
tsutsui 2011-01-22 16:59:26 +00:00
parent 6c793dc721
commit 434fbfac7f
1 changed files with 2 additions and 4 deletions
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6
sys/dev/ic/com.c
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@ -1,4 +1,4 @@
/* $NetBSD: com.c,v 1.298 2010/07/20 06:17:20 jklos Exp $ */
/* $NetBSD: com.c,v 1.299 2011/01/22 16:59:26 tsutsui Exp $ */
/*-
* Copyright (c) 1998, 1999, 2004, 2008 The NetBSD Foundation, Inc.
@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.298 2010/07/20 06:17:20 jklos Exp $");
__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.299 2011/01/22 16:59:26 tsutsui Exp $");
#include "opt_com.h"
#include "opt_ddb.h"
@ -465,8 +465,6 @@ com_attach_subr(struct com_softc *sc)
sc->sc_fifolen = 0;
} else {
SET(sc->sc_hwflags, COM_HW_FLOW);
SET(sc->sc_mcr, MCR_PRESCALE);
sc->sc_frequency /= 4;
sc->sc_fifolen = 32;
}
} else